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Measuring Depth with a Dive Computer

Do you ever wonder how deep the ocean is? When you sink into the surface and enter into the blue world, it seems like an endless abyss that could go on forever. Well, the ocean may seem like a fantasy world.

Scuba diving itself requires great skill and the right equipment. This includes a dive computer to measure the depth you’ve swum to since it impacts how many stops (if any) you’ll make while you rise to the surface. So let’s dive right into it.

Measuring Depth with a Dive Computer

What exactly is a Dive Computer?

Dive computers are often shaped like a watch or are mounted in a console. They play an important role of monitoring a diver’s depth in the water, the temperature, the amount of time a diver can safely spend under the surface as well as some other, additional features.

Their main role is to track the diver’s oxygen and nitrogen levels to inform the diver of the amount of time they can spend underwater without the danger of the formation of gas bubbles.

Dive computers compare the amount of nitrogen a diver takes in and breathes out. When deep diving, this is used to recommend when the diver should take decompression stops and for how long.

Certain high tech computers, such as the air-integrated ones will actually measure the exact time period of your dive and track  how much gas you have left in the tank.

Measuring Depth with a Dive Computer

Why Measure Depth

As mentioned earlier, dive computers track nitrogen levels to recommend the right decompression stops. The aim is to stop at the right depth and time to prevent the formation of gas bubbles in your system as their presence can lead to decompression sickness.

While it’s in many cases serious but not deadly, decompression sickness can cause pain in your joints and muscles. If the problem gets serious, it may even lead to paralysis. In the worst case it can lead to the death of a diver.

A dive computer is essential to give you accurate measurements of your depth under the surface and the time period you have to ascend to the surface. This helps in drastically lowering the risk of decompression sickness.

How is Depth Measured?

A mechanical dive computer works with the help of a Bourdon tube pressure gauge. This gauge comprises an oil-filled spiral tube with a closed gauge at the end along with a diaphragm.

As you sink into the water, the water pressure presses the diaphragm and the tube starts to straighten out. The degree of the curve remaining in the spiral is one of the factors used to measure depth under water.

Dive computers make their calculations with the help of algorithms for accuracy. In a dive computer, these algorithms are similar in their calculations as if you use dive tables. Algorithms may be:

1.   Conservative- they rely more on safety and keep the dive time restricted to reduce any risk of decompression sickness.

2.   Liberal- they keep a longer time span for the dive and the risk of decompression sickness is relatively higher.

Dive computers may make use of one or more algorithms in tandem to give more accurate measurements and ensure your safety underwater. Different algorithms may be used for different water temperatures, different nitrogen levels and so on. They also store information from your past dives and incorporate that history when calculating your depth and stopping points.

Diving safely with a dive computer

Looking at the Different Algorithms

Different dive computers make use of different models and algorithms when measuring depth. Most high tech dive computers will be making use of a combination of the famous Bühlmann Model and the Bubble model. They take into account the movement of gases in and out of the body as well as the development of gaseous bubbles.

Both of these are affected by the depth you’re diving to and the rate at which you make your ascent to the surface. In addition, your short-term dive history is taken intp consideration. Let’s look at how some of them work.

Oceanic Dual Algorithm

As the name suggests, Oceanic uses two different algorithms to calculate depth to give customized readings for different dives.

1.   The Pelagic DSAT: It calculates your total time spent under the surface by providing values for no decompression time, time spent outside the water and also the adjusted no decompression time.

2.   The Pelgaic Z+: This one takes temperature into account as well, more specifically suited for colder climates. It relies on the Bühlmann Model and is used for deeper dives with a longer dive time.

The Reduced Gradient Bubble Model

This model supports deeper dives. It on the formation of gas bubbles in the system, the amount of gas inhaled and exhaled and the growth of gas bubbles in the bloodstream.

Using a dive computer to find out how deep you are

What Impacts Calculated Depth?

Let’s take a look at the factors which can impact the calculations made by your dive computer.

Calibration

Dive computers must be calibrated according to the type of water they are being used in. This essentially refers to whether you are going scuba diving in salty or sweet water.

Salty water has a higher density and a greater weight value per meter depth. This impacts the points where a diver makes their decompression stops and for how long.

Your device must be calibrated accordingly to account for the salinity of the water to obtain accurate measurements.

Water Density

Water density differs in sweet and salty water and this directly impacts the effort a diver must exert to move around underwater. This is also known as drag.

Divers are more buoyant (likely to float) in salty water and must attach additional weight for scuba diving. This may include having a more weighted wetsuit and other diving equipment.

When diving, your total weight is not just your body weight; it is the sum of your body weight and your diving equipment. This will impact dive computer calculations as the greater the weight, the more time will be required to rise to the surface due to a higher drag.

Temperature

The temperature of the water is important for your health, safety and level of comfort in the water. However, it does not have any significant impact on depth calculations and hence is not taken into consideration.

Dive computers do provide the option of calculating water temperature for your personal safety and comfort during your dive.

How accurate does a dive computer measure depth

How Accurate is the Depth Measured?

No dive computer is 100% accurate. There is always a margin of error with most dive computers having a standard 0.3 meters (or 30cm) deviation from the actual reading.

These errors may vary among different brands and are also affected by whether your device is calibrated, according to salty water or sweet water. The saltier the water, the shallower the depth measured.

There are a few ways to work around these factors. As far as the water salinity is concerned, it does not affect the decompression calculations made by your dive computer. Those focus more on water pressure than depth.

Hence, this will not have a significant impact on your dive calculations. You can hold on to two dive computers if you want a greater accuracy in your readings. This is not essential, but if your dive computer seems to be giving an error that is very high, such as 2-3 feet, it is advisable to get your device checked by a professional and potentially replaced.

Dive computers may not always offer complete accuracy or work with algorithms you are familiar with. It is always advisable that you do a little prior research on the different manufacturers of dive computers and their specifications so that you end up with a device that you’re comfortable using during your dive.

Having the right dive computer is especially important during deep dives to measure your depth underwater. It then has to measure the depths at which you need to take your decompression stops in order to ensure that you do not contract decompression sickness which can potentially be very harmful.

How to Clean and Maintain Your Dive Computer

Diving is an exciting and magical experience. But since we’re not native to the sea, we have to be well-equipped with the right items to have a successful dive.

How to Maintain and Clean your Dive Computer

One such piece of equipment is your dive computer. Your dive computer is one of the key components needed for your dive. It tells you how deep in the water you are, where you need to make a stop and helps you through the process of ascending to the water surface.

It is essential to ensure that you clean and maintain your dive computer properly.

Why It’s Important to Clean It

Your diving equipment is what helps to keep you alive underwater so it’s always a good idea to keep your equipment in good shape by taking the right maintenance measure before and after your dive.

Scuba is an expensive sport, and one of the factors that makes it so expensive is the diving equipment you need to purchase.

The cost is reason alone that you can’t neglect the maintenance of your equipment if you expect it to provide great performance over the years. While you can find dive computers that are relatively cheap, you usually will have to spend several hundred dollars for one. Even though they’ve been designed for rough use, they are electronic devices that need proper care and cleanliness to function properly.

Fully equipped scuba diver

Pre-Dive Care

Battery Check

Before you plunge into the water, make sure that your dive computer is running properly. Check the battery to see if it’s fine or needs to be replaced.

If you’re doing this yourself, keep an eye out for the battery orientation before placing it in. Make sure that the battery compartment is sealed tight so you avoid any water to get in. If your computer is a bit more complex, seek the help of a professional.

O-ring Inspection

These handy rubber rings are used on a lot of your scuba equipment, including to secure the closure of the battery compartment on your dive computer. However, these rings suffer from wear and tear and can break under water pressure. Before your dive, make sure that they are intact or replace them as required.

Note: O-rings need somewhat frequent replacement. Even if you’ve got stored equipment that hasn’t been used at all, your O-rings might still need to be replaced.

Wireless Transmitter Connections

Air-integrated dive computers are a little more high-tech. They have a wireless transmitter that connects them to your tank to provide information on how much gas you’ve got left.

These wireless transmitters usually have a battery that provides the juice to to keep them sending signals to your dive computer. Check the transmitter battery to see if it’s running properly or needs replacement.

Diver pointing at her working dive computer

Checking Straps & Connections

Check the straps of your dive computer to ensure that they are intact. If your computer has any hose connections, have a look at them for any signs of wear and tear.

The Screen Protector

Water currents are strong and can force debris against your dive computer. That may damage your screen protector. Check for scratches or other damages and replace it if necessary.

Backlight

Most modern dive computers come with a backlight. While it is not absolutely essential if you have a torch, it’s a good idea to keep it in working condition. Test to see if it’s working and get it fixed if it’s not lighting up the way it should.

Dive Log Capacity

Dive computers store a limited amount of dive information, known as the dive log. Once their memory is full, old dive data is automatically deleted to make space for new data.

Transfer all your previous data onto your PC to ensure no information is lost and your dive computer has plenty of storage for your next dive. On your PC you can also analyze your previous dives in detail. This allows you to improve your breathing and plan your next dives.

Maintaining your dive computer

Post Dive Care

Clean & Dry

After your dive, rinse your dive computer with fresh water. While rinsing it, press all the buttons and twiddle any knobs of the computer to get out any bits of sand or grit stuck in between.

You can also use a bit of soap for this step. Keep a close eye on the sensors and other metal contacts attached to your computer. For a more thorough cleaning, you can use a toothbrush to get into the crevices of the device.

Finish the process by cleaning the device with a soft towel and leaving it in the open till it is completely dry. Don’t leave it out for too long or directly under the sun since this will damage your equipment.

Once it is dry, store it in a well-ventilated space, free of moisture and excess sunlight. A padded case is ideal for this.

Checking the Parts

All the measure you took before your dive should be taken again to ensure the longevity of your dive computer. Here are the steps to take:

  • Checking the batteries of your computer and any attached transmitters to see if they’re functioning properly or need replacement.
  • Inspecting the O-rings for signs of damage or breakage.
  • Checking the straps and other connections to see if they’re still secure or if they’ve suffered wear and tear due to water pressure.
  • Downloading the dive log onto your PC to have a backup of the data to avoid losing your diving history and having easy access to all your diving information.
Scuba diving requires functioning gear

Getting Professional Help

If you want your dive computer to perform well for many years to come, it is advisable to get your device serviced by a professional once a year or once every two years. They’ll take care of the calibration, battery checking and servicing of your computer.

Over the years, diving computers have become an essential piece of equipment for scuba divers. In order to have a safe diving experience, you should be able to rely on your device to work properly and give you accurate information about your current dive as well as store data about your past dives. Keep your diving computer in shape and have a safe and enjoyable dive.

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Best Dive Computer under $500 – Editor’s Picks for 2019

Finding the best dive computer under $500 should not be a challenge. That is if you are looking for a DC for recreational diving. Don’t expect to get a device that has features that you’ll need for technical diving.

We cover what you can expect from a device at that price point and what you won’t get. Lastly, we showcase ​five dive computers that stay under the $500 mark.

Best Dive Computer under 500

List of the Best Dive Computers under $500

In a rush? Check out our list here:

Buying Guide to the Best Dive Computer for less than $500

What Features can you expect?

At this price point you’ll get the basics. You can expect a reliable device that will keep you safe during a dive.

Regarding specific features you can expect the following:

RGBM with Adjustments

A safe RGBM algorithm that continuously calculates your dive data to keep your dive within healthy limits. Pretty much each dive computer manufacturer has their own variation of a RGBM algorithm.

Some are more conservative than others. If you dive with a buddy that has a DC from a different brand then you have to expect your dive limit calculations to be different!

Most algorithms also offer the ability to change the conservatism of the calculations. The settings allow to change the limits within the algorithm to be more conservative which ultimately means they end up providing you a larger safety margin.

Oceanic Geo 2.0 Display Detail

One or Multiple Gas Mixes

Most dive computers in this price range will provide the ability to have one nitrox mix. Usually they support oxygen levels up to 50%.

For most beginners and recreational divers being able to manage one gas mix is good enough. If you’re relatively new to the sport then diving with a single gas mix will cover you for usually the first few years if not even for a lifetime.

You find more and more dive computers that can handle up to two gas mixes. Most newer models are capable to do that. Depending on your dive needs this might or might not be an important feature for you. For recreational diving it often is of less importance to have this feature.

Audible and Visual Alarms

All dive computers in this price range offer various audible and visual alarms. Typically, you can expect the following types of alarms to be setup for a dive:

  • Dive Time​
  • High pO2
  • Violation of decompression ceiling
  • Maximum depth violation
  • Ascent too fast

These are the alarms that are most important for a recreational diver and they are usually all covered by a DC at this price point.

Mares Smart Dive Computer

Dive Log

You should expect the DC to have a solid dive log with enough memory to store dive data for at least 20 dives. Some models even provide enough capacity for over 100 hours of dive data to be collected.

Usually, the dive data will be collected at a fixed rate. Some models will allow to adjust the collection rate.

Connectivity to Computer (optional)

Dive computers offering a dive log will also offer the (optional) ability to connect the DC to your computer. All brands have their own software to install on your PC and in most cases you can get the software for Windows or for the Mac.

Cressi Giotto Dive Computer

What will you be missing?

Dive Planner

Usually you will not find a built-in dive planner in this price category. However, you should be able to offload the data to your computer and perform dive plans on the PC.

Air integration

Air integration is nothing you will find in this price category. You might get lucky and find a DC on sale that is capable of air integration but you most certainly will not get a device that has an air transmitter included.

Digital Compass

Integrated digital compasses are something you will have to look at the next price level. Usually, these devices will be more in the $800 to $1,000 range where you can see digital compasses being part of the feature set of the DC.

The 5 Best Dive Computers under $500

Let’s have a quick look at the 5 best dive computers under $500 below. These are not ranked in a specific order but do show our picks for the best wrist scuba computers in that price category.

Mares Smart Wrist Dive Computer

The Mares Smart is a wrist watch sized dive computer that packs a lot of features. It’s one of the few dive computers in this category that actually can handle two gas mixes.

Mares Smart Wrist Dive Computer, Black/Red

It checks off all the required features you’d expect in this class. The dive log on the Smart can hold around 36 hours of dive data that you can then transfer to your PC or Mac for further analysis or to plan future dives.

We reviewed the Mares Smart in detail. If you are interested to learn more about it then check out the in-depth evaluation here: https://www.deepbluediving.org/mares-smart-dive-computer-review/

Oceanic Geo 2.0 Air/Nitrox Scuba Computer Watch

The Oceanic Geo 2.0 is a feature rich dive computer in this price category. It offers Oceanic’s unique dual algorithm. This allows you to switch between two different algorithms allowing you to pick the one you feel more comfortable with.

Oceanic Geo 2.0 Wrist Computer, Slate Blue Grey

This feature also is great if you dive with a buddy that has a different dive computer. Chances are that one of your algorithms will match that of your buddies DC and as such you won’t get conflicting data and alarms.

The Geo 2.0 is also capable of handling two gas mixes. It can even go up to 100% oxygen on the mixes which is quite unique at this price point. The dive log is capable of keeping the data of up to 24 dives.

If the Oceanic Geo 2.0 is the dive computer you want to read more about then check out our detailed evaluation. You can find it here: https://www.deepbluediving.org/oceanic-geo-2-0-dive-computer-review/

Suunto Zoop Novo Dive Computer

The Zoop Novo is the updated model of the very successful Zoop. It is a huge upgrade in capabilities and it definitely is one of the best entry-level dive computers you can find.

SUUNTO Zoop Novo Wrist Scuba Diving Computer, Black, Without USB

It can handle one gas mix up to 50% oxygen. The dive log can keep an astonishing 140 hours of dive data. Connected to your PC you can also upload the data to Suunto’s Movescount portal where you can enrich the dive data with pictures and video and share it with friends and family.

The Suunto Zoop Novo is one of the best dive computers under $500. You can read more about it in our in-depth review: https://www.deepbluediving.org/suunto-zoop-novo-dive-computer-review/

Aqua Lung i200 Scuba Dive Computer

The i200 is the entry level dive computer from Aqua Lung. It offers all the features you expect and quite a little more. Similar as the Mares Smart, it’s roughly the size of a wrist watch.

Aqua Lung i200 Scuba Dive Computer

It handles up to two gas mixes with up to 100% oxygen. The dive log is capable of handling the data for up to 24 dives. The optional connection to your computer enables you to download the dive data from the device to your computer.

Aqua Lung has a whole lineup of great dive computers. You can find more information in our post here: https://www.deepbluediving.org/aqua-lung-dive-computers/

Cressi Giotto Watch Scuba Computer

The Cressi Giotto is one of the entry-level dive computers by Cressi. The level underneath it is the Leonardo which is probably the most complete beginner and entry-level dive computer available.

Cressi Giotto Wrist Computer, Black/Yellow

The Giotto is capable of handling two gas mixes with oxygen levels up to 99%. That’s more than sufficient for recreational diving. The dive log is generously sized at up to 70 hours of data to be stored. Connecting the Giotto to your computer allows you to download the dive data for further analysis and to plan future dives.

Everyone knows about the Cressi Leonardo. In our opinion the Giotto delivers additional useful features for a slightly higher price. Check out the detailed review of the Cressi Giotto here: https://www.deepbluediving.org/cressi-giotto-dive-computer-review/

Conclusion

There’s a good selection of highly capable dive computers in the category under $500. Looking at any of the five devices shown above as well as the many other scuba computers in this price range will provide you with a solid dive computer that’ll last you for years to come.

Which device you eventually pick depends somewhat on your personal preferences. Ask yourself whether you want an oversized device like the Suunto Zoop Novo or the Cressi Giotto. Or do you prefer a watch sized model like any of the other three? Larger displays often allow for better reading of the information on the screen under water. It also often means that it’s easy for you to switch the battery. Watch sized dive computers often have to be sent to a service center or to a dive shop to have the battery changed.

Let us know what dive computer you like best under $500 in the comments below. We’re looking forward to hearing from you.

Update for 2019

We’re constantly checking the market for new models that might replace one of the five listed here. While there are new introductions to the market, none of them so far has had features that would have made us want to replace the currently listed dive computers.

Update for 2018

When we check this best of list for dive computers under $500 for the year 2018 we didn’t change our picks. Why? They still are overall the best you can get. Now, having said that, we did discuss for a long time whether we should replace the Mares Smar​t with the new Mares Puck Pro Plus. They offer somewhat similar features yet the Puck Pro Plus is larger in size.

This has advantages when it comes to readability as the screen simply is larger. The downside is that you can only it for diving. The Smart can be worn as an everyday watch and as we did want to have a balance in our picks we decided to keep the Smart in the list due to it’s potential everyday use.

We had a similar discussion about whether to keep the Cressi Giotto in the list or replace it with the Cressi Leonardo. Why you wonder? Well, the Leonardo is a little cheaper due to not having all the features and is probably the most bought scuba computer available. Yet, again due to giving you a few more different choices we decided to stick with the Giotto. It offers more features for a slightly higher price and we feel that in the long run you might get more out of it than of the Leonardo!

Best Dive Computers in 2019 – Editor’s Picks

Buyers Guide to Finding the Best Dive Computer 2019

There is nothing more tranquil than plunging into the abyss and watching the rays of light wafting into the water above you. It’s just you and the never-ending blue. You have corals for company and the occasional Great White.

Scuba Diving is fun, it’s surreal, it’s ethereal, and it can be dangerous.

How to find the Best Dive Computer

If you are a first timer, you want to ensure that you spend more time awing at the many delights the ocean will throw at you, rather than fiddling with multiple pieces of equipment, trying to figure out how much time you have before you run out of air. That’s always the first timers’ most important concern, isn’t it?

If you are an experienced diver who scrounges the ocean floor for wrecks, you already know the importance of having a good diver computer. Those wrist-watched sized data crunchers that do all the hard work of computing a thousand different probabilities and displaying on a colorful screen that, ‘Hey buddy, it’s time to head back up. Civilization calls‘.

Personal scuba computers can be lifesavers. Not to mention that with a few many additives thrown in, you get exclusive bragging rights in the scuba diving community. But if trying to select one off the shelf doesn’t make your head spin, then you are not aware of the tech specifications and the gobbledygook you will have to navigate through, just to get numbers on the screen.

Thankfully, we help you pick the top dive computers for you, irrespective of your skill level or the tech that you are looking for. But before we wear our flippers and plunge headlong into it, let’s quickly take a moment to understand what dive computers are all about and a few desirable features that can make or break you, when you are submerged 100 feet under the ocean.

We structured this post by highlighting what you need to know about picking the top choice diving computer for yourself and our suggestions of specific models to look at.

Our top picks

 
Product Features
Best for
Shearwater Research Teric

Shearwater Research Teric Wrist Dive Computer


Read full review
  • Brilliant, Configurable Display
  • Optional Air Integration
  • 3D Compass
Overall
Cressi Leonardo

Cressi Leonardo, Black/Orange


Read full review
  • Simple one button navigation
  • Air and Nitrox
  • Complete Reset Capability
Beginners
  • Simple two button navigation/li>
  • Optional air integration
  • Strong backlight
Entry-level with small display
Oceanic Geo 2.0

Oceanic Geo 2.0 Wrist Computer, Slate Blue Grey


Read full review
  • Dual Algorithm
  • Straightforward four button navigation
  • Gas switching during dive
Affordable dual algorithm
Suunto Vyper Novo

SUUNTO Vyper Novo Wrist Computer with USB Cable, Grey, Without Transmitter


Read full review
  • Easy to read display
  • Large Log Book
  • Four button navigation
Mid-level wrist mounted
Atomic Aquatics Cobalt 2

Atomic Aquatics Cobalt 2 Dive Computer with PC Download Kit & Quick Disconnect, Black


Read full review
  • Brilliant color display
  • Up to 6 nitrox gas mixes
  • Integrated 3D compass
Console Mount
  • Ultra-sharp colorful display
  • Up to 4 gas mixes
  • Bluetooth connectivity
Overall Display
Shearwater Research Perdix

Shearwater Research Perdix-AI Dive Computer


Read full review
  • Large color display
  • Trimix ready
  • Closed circuit rebreather capable
Technical Diving

How to Pick the Best Scuba Diving Computer for Yourself

First things first, a dive computer is a computing device used by scuba divers that’s worn on the wrist or inside a console. It resembles a smart phone screen and does some lifesaving calculations for you.

It measures your depth (built-in depth gauge), time of the dive (timer) and then it calculates and informs you about the amount of nitrogen you have absorbed in your body. The higher your nitrogen saturation, the longer time you’ll need for your ascent. It shows this time on a large and often colorful screen that is easily visible under water.

Does that simplify things a little? Now it’s time to venture into more complicated turf.

How do you pick the best scuba diving computer for yourself? Here’s how.

What’s your skill level?

Beginners should stick to the basics. Look for something that has a clear and visible screen and does what it’s supposed to do without you having to fiddle with it. There are a lot of good scuba diving computers which do just that.

Some standard features you’d want in one are depth, time, no stop limits, ascent rate, no decompression limit (NDL) or no stop time, emergency decompression and information about the previous dives. More advanced or recreational divers may want additional features like open circuit air/nitrox/trimix compatibility.

Dive computer working hard underwater

Reliability and Durability

Your dive computer tracks potentially life-impacting environmental information. Don’t go just for the lowest price on a device that in a certain situation your health could depend on.

You want to get a computer that is reliable and durable. Diving is not kind to your gear. No matter whether you dive in the ocean, in caves, or just in a lake, you will expose your gear to harsh environments. Constantly changing temperatures, scratches, bumps, salt water, many travels, to just name a few…

They build these computers tough to withstand all of these challenges. Just strapping on a waterproof sports watch or slightly improved fitness tracker will not do it.

Grab a specialized dive computer that is built to work reliably under those conditions. Flexible straps, scratch and shatterproof screens will make sure that your device won’t let you down when you most need it.

Display

You want to see the data large and clear. So look for a big (colorful) screen with a backlit display. A dot matrix display works equally well too as long as it is visible.

Some newer models offer the latest technology to display data. Top of the line displays today are OLED based, similar to high-end TV’s. They offer brilliant colors and clarity that is hard to beat and makes reading the data underwater a lot easier.

Screen Size

With our trend to make everything smaller you might think having a smaller screen underwater is better. That somewhat depends on yourself. Many divers prefer a smaller screen as they can use the dive watch also on land.

However, the purpose of a dive computer is first of all to be able to see important information underwater. Light conditions can vary and it’s hard to read the data on a small screen. Soon this will improve as they will introduce more and more devices that use high-contrast and colorful displays that use OLED technology. Data displayed can in that case easily be read even on a small screen.

Specifically, if you are vision impaired or you dive with prescription lenses, then pick a display size that is rather large. It will display the data on a bigger screen making it easier for you to read even if you can’t rely on the corrective lenses in a dangerous situation.

Scuba diving couple with wrist mounted computer

Backlight

Nearly all available models today offer a backlit screen. Even LED or OLED variants use some sort of backlight to produce the vibrant displays on the device.

Some older low-end models do not have a backlight. You must use a flashlight or torch to be able to read the data on the screen.

Not having a backlight results in less battery consumption. A strong backlight potentially drains the battery nearly as much as the rest of the computer itself. Use it sparingly to conserve battery during diving.

If your dive computer does not have a backlight, then shining a flashlight against it to read the display sounds easy. It’s not that easy when you have to fumble for the torch first to be able to read the data on the screen.

You should definitely go for a backlit screen as it’s easy to read in darkness and even in sunlight. You’ll avoid having to search for your torch to be able to read the data. One quick thought though. If you’re looking at some of the latest dive computers with OLED based displays, then please know that they have minor issues when you try to look at the display in bright sunlight.

backlight on computer

Sizing and Weight

Considerations on screen sizes we pointed out above have a direct impact on the weight and overall size of the device. Underwater, the weight aspect is of a lesser importance than on land as you don’t have to lift the weight. Usually, these devices are also too light to make a difference in your weight calculations for buoyancy.

However, the physical size of the device can very well have an impact. You most likely would not want a huge piece of equipment on your wrist during a dive. It can be a nuisance and you can’t easily get to see the important information.

Similarly, a device that’s too small can be hard to grab and read when you’re immersed. Most devices you can get today are reasonably sized and allow for ergonomic handling underwater with or without gloves. Some technical dive computers end up on the larger side. They have a lot of features that need to be packed into a device so you potentially have to get used to such a larger device on your wrist if you get into sophisticated technical diving.

Lastly, having a small device works well in warm environments where you’re probably only wearing a rash guard. If you dive in colder waters and you need a wet suit or even a drysuit, then most of these small computers offer the problem of not having a long strap. You will have trouble to mount them on your wrist on top of your suite as the straps are not long enough.

User Friendly

As we said before, you don’t want to be fiddling too much with your dive computer under water. Look for something that’s as hands free as it can be. For the tasks that demand your fingers, look for models with large buttons. Remember that you potentially will wear thick gloves.

Another aspect of being user friendly is how you prefer to navigate through the different options. Some entry-level models offer a single button. While this is simplifying things on one hand, it makes it harder on another.

If there’s a few menu options then using one button can make life a lot easier. Multiple buttons are necessary when you have a device with many features. In that case it’s easy to navigate to the specific option/display you’re looking for without having to step through the whole set of menu choices.

Trimix capable Dive Computer

Comfort

One thing many don’t think about is that your dive computer should be comfortable to wear. It’ll be with you at every dive and one thing it should not be is that it irritates you.

If you intend to use a small system you wear on land and in water then check that the straps are comfortable to wear all the time. If you use them on top of your wetsuit, then a slightly rougher material might not be an issue. If you wear it on your skin all the time, then you want something that can be worn comfortably.

Price

The average price for a personal scuba computer with standard features is around $250-$500. Advanced ones will make you poorer by $800-$1000. Beginners should pick an entry-level device that is not only more affordable, but that reduces the complexity of the computer.

More features usually result in a higher price. If you want a technical dive computer where you can change algorithms, have air integration, an integrated compass, etc. then you not only have to expect to pay more but you will also need to get a much better understanding of how to use the system.

Scuba diving with a personal decompression calculator

Mount Style

You have two different styles to choose from. One is a wrist watch styled dive computer which once again has two different varieties, one that looks like a hockey puck and the other which resembles a normal wrist watch and can be worn on land too.

The second style is a console or boot mount styled computer that has all the features packed into a compact device. You can often find the same device to be available in either a wrist- or a console-mount. It is somewhat of a personal preference and not necessarily a safety or capability question on which type to choose.

In our opinion it can be easier to use a wrist-mounted system as you always know where it is. A console, if not setup correctly, can have a life of its own and you potentially could end up trying to look for it. It can be a problem if you end up in a dangerous situation and you’re not instantly able to see the data you’re looking for as search for the console first.

Dive Modes

Pretty much any modern dive computer will offer you several modes. Most common in all models are gauge mode and air.

Nowadays pretty much any device will also be able to deal with at least one nitrox/gas mix. If you’re thinking of venturing into technical diving, then having a computer that provides different models to deal with gas blends is of essence. The modes to consider are multiple gas mixes including Tri-mix you can switch during a dive.

If you also enjoy freediving, then you want that mode to be part of the offered features. Technical divers that use a re-breather require a computer that can calculate limits for re-breathers.

Staying safe without violating decompression limits

Algorithms

All dive computers use an underlying algorithm that is tracking your absorption of nitrogen under pressure while you dive. These algorithms are based on a variety of different models and the goal is to keep you safe while you dive.

Every manufacturer has their own little tweaks on this and these algorithms are not all the same. Some are more conservative (less time underwater) while others are possibly even based on different models and are more liberal (more time underwater).

Nearly all available computers will allow you to influence and adjust the calculations. Usually, it means you can change them to be more conservative. This can be a good idea specifically if you are a beginner or just diving again after a while.

You’ll often experience these differences when you dive with a buddy or group where everybody has a different brand of dive computer. Some will alarm for decompression limits earlier while others will do that later. If you don’t cheat your dive computer, you should be safe no matter how conservative or liberal the calculations are.

Oceanic tries to overcome this dilemma by having dual algorithms in their computers. You can pick which algorithm to use when you dive with a group or buddy that uses a different brand. That way you get your calculations close to each other.

Air Integration

Last but not the least, air integration is one of the most sought after technologies in the top dive computers. It allows you to connect it to the oxygen tank using a transmitter and it will display the amount of air time remaining and the PSI reading of the tank.

This sounds straightforward but there are a few things you need to consider. First, how do you want your air integration to work? If you use a console mounted dive computer, then it might have a pressure gauge integrated that connects to your tank via a hose.

Otherwise, the most common air integration is done through wireless transmitters on your tank. These typically work well.

If you are a dive guide or teacher, then you might need a more advanced setup where you can wirelessly track the air levels of all the members of your group. You can find dive computers that can connect to multiple wireless transmitters allowing you to track the pressure in each tank so you can safely get everyone to the surface.

Diving safely within limits

Connectivity

One often overseen aspect of your dive computer is to be able to log your data and to download it to your PC. Log capabilities are different in nearly all devices and some can store data for many dives while others have a limited log capability.

The latest generations of dive computers often offer Bluetooth connectivity with your smart phone or computer. You can download your dive data wirelessly. Other options are that you can connect through a USB cable which most times is optional and will cost you extra.

Being able to analyze your dive log can be helpful. Not only does it give you bragging rights, but you actually can compare the data collected on different dives, so you can work on your air consumption, etc. That might not be your priority but once you gained enough experience, it can be an interesting aspect of using a dive computer.

Changeable Battery

All dive computers run off batteries. Some even come with rechargeable ones. That sounds at first glance like a great thing but is it?

Having a rechargeable battery has advantages. First, you won’t have to change the batteries when they are empty. However, it can be quite a negative when you’re on a dive trip and you forgot the charger. Once the battery is drained you’re stuck with no computer.

Another obstacle found with some models is that you can’t change the battery yourself. It’s required that you send your device to a service center where the battery gets changed. That many times is not an issue as you can plan around your dive trips but it can be if you miss having them changed early enough and during a dive vacation you find out that the battery won’t last long enough. If you are in an area that offers lots of diving then you might be able to find such a service center and have the battery switched in a short period of time

The potentially best solution is that you get a dive computer where you can change the batteries yourself. In that case you have a spare battery with you or at least you can purchase one of these standard batteries pretty much anywhere worldwide. The downside is that you will have to open the case to change batteries. Make sure that the system is protected from water after you change and most battery replacement kits from the different manufacturers include O-rings that should be changed, etc.

The Best Dive Computers in 2019

Keep the issues listed in the above buying guide in mind. We have compiled the list of the best dive computers for 2019. We highlight their strengths and weaknesses and also suggest what each model is best used for.

Shearwater Teric – Best Overall

It’s not that easy to introduce the Shearwater Research Teric. Why you wonder? It’s just an amazing new dive computer that was introduced recently and it’s hard to figure out what would be missing.

The screen is amazing. Yes, it’s a smaller size and you use the Teric as an everyday watch if you have a large wrist but it’s crystal-clear and displays all important information. You won’t have any issues reading the data underwater.

Shearwater Research Teric Wrist Dive Computer

The Teric is the best technology available today packed into a top-quality case that also looks quite attractive. The glass is made from sapphire crystal and is highly scratch resistant. Even hard impacts won’t result in a broken display!

You navigate the features in the menu through four separate buttons along the sides of the case. You can even program one button to quickly get you to a specific menu option. The screen itself can be configured to show any data you want in whatever font-size and color you prefer.

The dive watch is a little large to be worn every day (except if you have a pretty large wrist), and it is designed to not only have vibrating and audible alerts for dive limit violations and warnings but also so you can have up to two daily alarms.

Even more amazing is that this small device comes with an integrated 3D compass for diving. The readings are displayed along the outer edge of the display making it easy and intuitive to use.

The Teric offers air-integration. You can connect it to two separate wireless transmitters to track gas and air consumption in up to two tanks. It can deal with Air, Nitrox and Trimix. You can even use it with a re-breather or in freediving mode.

It comes with a rechargeable battery you can’t replace yourself. Battery life is up to 50 hours between charges and you can charge it wirelessly.

The Teric has a logbook with up to 500 hours of dive data. You can connect it through Bluetooth to your PC or mobile device to offload and analyze your dive information.

We’ve evaluated a lot of dive computers and this is truly the best we have come across in our opinion. You can also have a look at our in-depth review of the Shearwater Research Teric to get a better idea whether this is the right device for you.

Best Features

  • Easy to use four button navigation
  • Brilliant, colorful display
  • Five modes for recreational, technical, gauge, rebreather and freediving models and an everyday watch
  • Fully configurable display
  • Integrated 3D compass
  • Optional air integration

What Could Have Been Better

  • User-replaceable battery
  • High in price as you would expect with the offered feature set

Summary

There’s not much else to say than ‘Wow’. The Shearwater Research Teric offers it all. It’s overkill for a beginner. Otherwise, it’s a great scuba computer that has all the features and functions you could ever require.

We honestly don’t know why anyone wouldn’t be excited to have this technological marvel to keep you safe underwater. The only reason not to look at the Teric is if you’re opposed to wrist-mounted diving computers. Besides that, it’s hard to imagine a better computer on the market at the current time.

Cressi Leonardo – Best for Beginners

One of the most important features that beginner divers look for, is to get access to important information when they need it the most, without having to fiddle through unwanted screens. That’s precisely what they get with the Cressi Leonardo. With a one button user interface to get information and customize the dive computer, it is one of the most user friendly models in the market.

You can toggle through the various modes and settings in the blink of an eye without getting lost while doing it. The Leonardo features a module design which allows you to use it as a wristwatch and also remove it and mount it to a console. It comes in a variety of color combinations.

Cressi Leonardo, Black/Orange

It includes an air and Nitrox mode (up to 50%), has a large segmented dot-matrix backlit display which displays all the information clearly. While it uses a conservative algorithm, it offers users enough options to tailor this level.

An in-built log stores data for up to 60 dives and there are critical audible alarms to sound the most important information. The backlight is not the strongest and could use improvements.

We’ve compiled a detailed review on the Leonardo if you want to dive deeper into what it offers and what features you’ll be missing compared to more expensive alternatives.

Best Features

  • One button user interface
  • Air and Nitrox compatible
  • Nitrox settings can be retained
  • Audible alarms for critical information

What Could Have Been Better

  • Poor quality backlight
  • No air integration

Summary

This is a great dive computer for beginners and also a great choice for a backup dive computer for recreational dives.

If you’re willing to spend a little more, then check out the Cressi Giotto (click here for a detailed review). It’s a step up and offers some better features. You can also check out our head-to-head comparison of the two devices to learn more about the differences in detail.

Mares Smart – Best entry-level with a small display

The Mares Smart is a minimalist but efficient entry level dive computer that trumps a lot of high-priced models with its intuitive user interface and two button control. It may lack the bells and whistles you’ll find in higher end devices. But it more than makes up for it with its well thought out dive mode screen and comprehensive data.

It has a stylish and sleek design with both the buttons and the bezel ring made of stainless steel. This also gives it a more solid feel unlike flimsy all-plastic models. The Smart can also double up as a sporty wrist watch when you are not diving. It comes in a variety of colors to match your style.

Mares Smart Wrist Dive Computer, Black/Red

The main display shows you the vitals such as NDL, water depth, dive time and temperature. Besides this, there is an ascent rate indicator and tissue loading bar graph. There is an alternate screen which shows the gas mix, the average depth, the max depth, the current time and the oxygen toxicity.

The two button controls make it easy to change the screen. The top button can be used to tweak the settings in the upper part of the display and the lower button allows you to navigate through the alternate displays.

It allows two gas mixes (21 – 99% Oxygen) and the Surface interval countdown is another stellar feature of the Mares Smart, which makes it a versatile choice at this price point.

There are visual and audible alarms for critical alerts and the backlight is excellent allowing clear visibility even in the dark. If you make the noob mistake of ascending too quickly, it sounds an alert with a large ‘SLOW’ on the screen.

We’ve compiled a detailed review of the Mares Smart that you can find here. It’ll go more into depth on showing the available and missing features of this model.

Best Features

  • Two button easy navigation
  • Air and Nitrox
  • ​Dive log
  • Clear visible backlit screen
  • Audible and visible alerts

What Could Have Been Better

  • No air integration
  • No compass

Summary:

Priced at under $350, the Mares Smart offers enough features to make it a great buy at this price point. It may be considered as an entry level dive computer because of the innocuous appearance and lack of a colored display. But it packs a punch with its features and is even used by professional divers.

Mares introduced another model of the Smart that comes with air integration. It’s basically the same set of features as the Mares Smart except that it offers (optional) air integration through a wireless transmitter on the tank.

Oceanic Geo 2.0 – Best affordable dual algorithm

The Oceanic Geo 2.0 is a somewhat unique, affordable computer that targets beginners and recreational divers. What makes it unique is Oceanic’s dual algorithm setup. You can switch between two different versions which makes it ideal if you’re often diving with different buddies.

You can pick which algorithm to use based on what dive computer is used by your buddy. That will give a more equal match of computations and you are closer matched to the alarms and warnings of your partner.

Oceanic Geo 2.0 Wrist Computer, Slate Blue Grey

The Geo is a wrist-watch sized device you can wear all day. It comes in several color combinations. It doesn’t have all the bells and whistles of more expensive devices but it has features you wouldn’t necessarily expect at this price point like automatic altitude adjustments.

The display is a little cramped, but it’s still easy to read all the information shown. The backlight is good and allows to read the information in less than perfect lighting conditions. Navigation of the menu items and overall use is simple through four buttons placed evenly around the display.

The Geo 2.0 can handle two gas mixes that can range between 21% and 100% Oxygen. The dive log is small with data being kept for up to 24 dives.

They do not offer air integration for the Geo. That’s not surprising at the price point it’s offered. Besides that, it offers anything a recreational diver could look for. You can even switch the battery by yourself.

You can checkout our in-depth evaluation of the Oceanic Geo 2.0 here. There you can find a lot more detail on this amazing dive computer.

Best Features

  • Straightforward navigation with four buttons
  • Two gas mixes (Air and Nitrox)
  • Dual Algorithm with conservatism settings
  • Switch gases during a dive
  • ​Automatic altitude adjustments

What Could Have Been Better

  • Smallish screen
  • Limited size of logbook

Summary:

The Geo 2.0 checks all the boxes for an entry-level and recreational dive computer. It offers Oceanic’s unique dual-algorithm setup which makes it easy to adjust your computer to the one of your buddy to avoid getting alarms and warnings that don’t line up.

The logbook is small and if you are looking at a scuba computer with air integration, then you’re out of luck with the Oceanic Geo 2.0. The logbook can easily be downloaded to a PC so you usually won’t run into an issue losing any data. The only time it can be a tight squeeze is if you go on a longer dive vacation and don’t have a PC with you.

For the price you pay you get a stylish dive computer you can use every day. It’ll last you for years to come until you require additional features like air integration. If you like to have the dual algorithm setup, then you’d be looking at the Oceanic OCi at that point. We have a detailed review of this device to be found here.

Suunto Vyper Novo – Best mid-level wrist mounted

The Vyper Novo is the upgraded version of the very successful and widely used Vyper (check the differences between the Vyper and the Vyper Novo here[GS16] ). The Novo model received some impressive upgrades like air integration, handling of multiple gases, etc.

These features make it also one of the best scuba diving computers you can find today. It’s a great device if you’re an experienced diver but is also not too complex to be managed by a beginner. The Novo can manage up to three different gas mixes.

SUUNTO Vyper Novo Wrist Computer with USB Cable, Grey, Without Transmitter

Compared to models that are sized like a day-to-day watch, the Vyper Novo is large. The benefit is that the larger display shows all important information at-a-glance.

The number of buttons to press to get any information you might need is minimized. This way the gadget is what it should be, a device to help you stay safe while diving and not yet another technical nightmare you need a PhD to understand!

The large size makes it easy to press the buttons even when you wear thick gloves. The display is sharp and easy to read in any light condition. The backlight allows to see data even in the darkest spots under water.

We prepared an in-depth evaluation of the Suunto Vyper Novo. Check it out if you’re interested in this particular model that’ll be a trusted device for years to come.

Best Features

  • ​Easy to read display
  • ​Navigation is intuitive with 4 buttons
  • ​Large log book for up to 140 hours
  • ​Capable to integrate up to 3 wireless gas transmitters

What Could Have Been Better

  • ​Large size which can’t be worn as a daily watch.

Summary

The Suunto Vyper Novo is a feature-rich scuba computer that offers everything that an experienced diver needs. As a recreational diver there are no capabilities you could require that are not delivered.

The features you get even include a 3D compass. If you combine that with the wireless air integration you end up not needing a bunch of other gauges and devices.

Even if you are in your early days of diving, you can have a closer look at the Vyper Novo. The air integration can be something you add later as it’s optional. The base device offers features that will be satisfactory for years to come!

Atomic Aquatics Cobalt 2 – Best Console Mount

The Atomic Aquatics Cobalt2 is our pick for the best console mounted dive computer. It’s feature-rich and offers a brilliant color display. It offers all the bells-and-whistles you could look for as a recreational diver that uses air or nitrox for diving and prefers the console setup over the wrist mount.

Most other manufacturers offer a range of dive computers to choose from. Atomic Aquatics offers only the Cobalt 2. For good reason as it is a solid system that will usually not have you missing any features if you dive recreationally.

Atomic Aquatics Cobalt 2 Dive Computer with PC Download Kit & Quick Disconnect, Black

The display is colorful, provides graphics and can be configured by you. You can set up what data you want to see on the screen. Navigation is performed through four buttons on the device.

The computer offers air integration. It uses a hose to connect the Cobalt 2 to your regulator to measure the pressure in the tank and display it.

Another high end feature that is part of the device is the integrated 3D compass. Having a rather large and colorful display helps with being able to get an instant view on your bearings through the compass. It can be harder to use a compass on smaller screens.

There’s a lot of menu options for you to choose from. You can easily navigate through them with the four buttons on the bottom. The Cobalt 2 allows to switch between up to six nitrox gas mixtures.

The computer is powered by a built-in lithium ion battery you can recharge. Each charge allows the device to work for up to 60 hours so be sure to bring the charging cable if you go on an extended dive trip.

The logbook is large at around 600 hours of dive time. The color display makes it easy to display detailed dive data from past dives including graphics. You can connect the Cobalt2 to your PC to download dive data through USB cable.

Best Features

  • ​Brilliant color display that can display curves and charts
  • ​Intuitive navigation with 4 buttons
  • Log book for up to 600 hours of detailed dive data
  • ​Up to 6 nitrox gas mixes
  • ​Integrated 3D compass for navigation

What Could Have Been Better

  • Rechargeable battery that can’t be switched

Summary

The Atomic Aquatics Cobalt 2 is a console-mounted dive computer that leaves no wishes unfulfilled. It offers features you expect from a high-end device such as this.

Having air integration and a 3D compass together with up to 6 different nitrox mixes makes it a great scuba computer for experienced divers. The only things you might miss are trimix or rebreather setups.

We’re also not that excited about the rechargeable battery. While in theory it’s great and environmentally friendly we think a user-switchable battery is helpful if you are on dive trips where you potentially have a hard time to find a charging possibility.

Oceanic VTX – Best Overall Display

The Oceanic VTX has a visibly different design than many other diving computers. The screen alone is amazing and displays the information clearly and in vibrant color.

The overall navigation and usage of the device is easy. The buttons are placed strategically and can be used even when you’re in thick gloves.

Oceanic VTX OLED Complete Scuba Computer with Transmitter

The VTX is worn on the wrist. It is a very specialized device so it can’t be worn as a regular watch! Looking at the features it is amazing though to have all those capabilities packed into a reasonably small device.

The Oceanic VTX targets experienced divers with demanding needs for features and data. It is feature rich and allows to do a lot of data gathering and programming. It easily connects to a computer through Bluetooth.

The log book is a little on the small side with enough capacity for around 24 dives. Going on a scuba vacation might push you over the limit here. The other caveat is that the battery life could be a little longer. It’s around 20 hours. Diving trips where you’re not having a computer handy to offload dive data and where you use the computer more than usual can easily end up with frustrating moments where you run low on battery and/or dive log!

Best Features

  • ​Fantastic, colorful display
  • ​Easy navigation
  • ​Up to 4 gas mixes
  • ​Bluetooth connectivity

What Could Have Been Better

  • ​Somewhat bulky​
  • ​Logbook could be larger​

Summary

The Oceanic VTX is definitely considered a high-end scuba diving computer. That’s not only reflected in the features and capabilities it offers but also in the price.

Besides all the bells and whistles that this device offers, the highlight is the display. Colorful and vibrant, yet very clean. It shows all information you need in a clear and concise way.

If you’re not an experienced diver and do not you require all the data collection so you can slice and dice it as you please, then you’ll definitely find other scuba computers that are cheaper and offer a set of features that matches your needs. The VTX has it all but that can end up being a little too much for many divers.

Shearwater Research Perdix – Best Technical

The Shearwater Research Perdix is one of the latest and flagship offerings from the Canadian manufacturer who commands a cult following among diving enthusiasts, ever since they launched into the market with the ‘Predator’, their first dive computer.

The Perdix is an upgrade worthy of every accolade it is receiving. This is a smartly designed dive computer that can be taken along for anything from recreational dives to deep water technical dives. It is small, has a slim profile and a long-lasting battery.

Shearwater Research Perdix-AI Dive Computer

What greets you out of the box is a large 2.2-inch color screen display with ample space for displaying all the information you’d ever need. You can see adaptive safety stops, the number of stops, the depth and the duration of stops that is tailored according to your dive time and previous dive history.

The Time to Surface is displayed clearly and shows you the most important information, considering all the safety stops.

You can customize or choose from four different dive modes, OC recreational, OC technical, CC-INT and gauge. It’s aimed at advanced and technical divers and can handle a rebreather.

Best Features

  • Large colorful display
  • Multiple modes including technical and closed circuit rebreather
  • Trimix compatible
  • Lots of customization options

What Could Have Been Better

  • Nothing. This is one of the top dive computers that you can invest in.

Summary

The Shearwater Research Predix bridges the gap between a recreational dive computer and a technical one. It is a flawless package. If you intend to go beyond the average recreational dive or into deeper waters, this is what you need.

Common Questions you might have

How much does a dive computer cost?

Dive computers are not a cheap piece of your scuba equipment. On the low side you must estimate at least $200 to $300 to get an entry-level model.

On the high-end side you can expect to spend more than $1,000 for the personal dive monitoring device plus a few hundred for wireless sensors. However, there’s really no ceiling on how much you spend.

Should beginners use a dive computer?

There’s no doubt that any diver should use one of these decompression calculators. Whether you’re a beginner or an experienced diver, these computers will keep you safe and out of harm’s way.

You can use dive tables to calculate your dives but the real-time tracking you get from using a computer can’t be overvalued. It adds a level of safety as it measures data during your dive while using dive tables only allows you to plan your dive without taking the actual data into consideration.

A dive computer takes the guesswork out of whether you should do a deco stop, need a safety stop or whether you can just ascent slowly and safely. Tracking your dive history also allows to take remaining nitrogen levels in your body from previous dives into consideration.

Dive computer for beginners

What is air integration on a scuba computer?

Basic devices only monitor and track the time you spend underwater and the depth you reach. You still need a console that measures the air left in your cylinder and provides (usually) a compass to help to navigate.

More feature rich dive computers usually offer (optional) air integration. Most modern systems connect your dive computer to your tank wirelessly. You have to connect a sensor/transmitter to your tank that then provides the information for your dive computer.

This way you can track the pressure in the tank and the dive computer can calculate time-remaining, provide warnings on when to come up, etc.

How does a dive computer work and what is it used for?

A dive computer is a computational device that tracks in the simplest case your time underwater and the depth you’ve been diving to. It then uses an algorithm to provide you with data on when you have to come up, what decompression limits you have to adhere to, etc. The data is used to compute limits on ascent speed and timing to prevent decompression sickness for the diver.

Higher-end personal decompression computers will also track multiple dives, air consumption, provide navigational help with an integrated compass, etc. Technical dive computers also let you influence the limits for diving to push boundaries and analyze collected dive data.

Calling a dive pointing at dive computer

What do you do when your dive computer stops to work in the middle of a dive?

First things first. The safest action is to end your dive. You’ll signal your dive buddy to call the dive and start your ascent together with him or her. Use her dive computer as a guide to do your ascent.

If you and your buddy have different dives just before the current one then add a safety stop on your ascent to make sure that his or her computations don’t endanger your health and potentially lead to decompression sickness.

Once you’re safely above water, you want to change or charge your batteries. That should get you back on track quickly.

Some divers also have a backup computer with them. If you do then use that but keep in mind that the calculations can be off if the backup does not have all the dive data from your previous dives!

What is Nitrox and Trimix diving?

Most recreational diving is performed using compressed air. If you want to be able to extend your time underwater, then using Nitrox gas mixes can help you with that. In that case the amount of oxygen is increased in the gas mix to allow to stay underwater longer. This has side-effects you have to be aware off though. You can read more here.

Trimix adds Helium to the gas you’re breathing underwater. This is necessary to prevent negative impacts of high oxygen and nitrogen levels underwater. Specifically, it’s used for commercial deep diving. It can go as far as a mix of only Oxygen and Helium which is known as Heliox.

Do you still need to use Dive Tables when you use a Scuba Computer?

There’s technically no need to use compression tables when you use a diving computer. All the calculations done with the tables are handled in real-time with the computer.

Having the computing device take over results in much easier, yet usually safer diving. Your computer tracks your dive history automatically and you don’t have to constantly take that into consideration when you try to calculate your safety and dive limits with the help of dive tables.

This makes using a dive computer a much more reliable and safer planning and tracking tool than the old-fashioned tables. However, you should still be able to use the tables to calculate your dives so you get a better understanding about those limits and where they come from.

Conclusion

We hope you enjoyed browsing through our list of the best dive computers. We have tried to include a few entry level models, something mid-range and something for the serious guys to play with. Always do your research and make an informed decision.

If you are just starting to scuba dive, then you want to check out our guide to find the top dive computer for beginners.​

Cressi Leonardo vs. Suunto Zoop Novo

Comparing the Suunto Zoop Novo with the Cressi Leonardo

​Both the Cressi Leonardo and the Suunto Zoop Novo are dive computers designed for the beginner diver. They are affordable and provide a set of capabilities that matches the entry-level diver.

When we talk about ‘limited’ functionality then please know that many divers will never need more capabilities as any of these two dive computers offer. Will there be things you might miss if you have dived over 100 dives? Yes, but even then it won’t be essential to have those capabilities in most cases

Suunto Zoop Novo compared to Cressi Leonardo

At first glance both dive computers are not that different. They both come with large screens which makes them too large to use and wear as a day-to-day watch.

Functionality Differences

The first difference you will see is that the navigation on the Cressi Leonardo uses a single button. The Suunto Zoop Novo features four buttons to navigate through the functions.

Both approaches have their advantages and disadvantages. The upside of a single button navigation is that it’s super-easy to use and that you can’t confuse any buttons when you dive with gloves. The downside is that you have to step through all menu items to get to where you want to get.

Using multiple buttons to navigate allows you to reach certain menu selections faster as you don’t have to step through all of them. However, you have to memorize which button does what and if the buttons are too close together, you can easily confuse them or not be able to touch the right one if you wear thicker gloves. The Suunto Zoop Novo features a good compromise in this area as the buttons are spaced very far apart so you won’t press the wrong button by accident.

SUUNTO Zoop Novo Wrist Scuba Diving Computer, Black, Without USB

While the navigation has differences by how many buttons you have to use, the overall functionality of both dive computers is not that different. Both offer the basic features you will need to dive safely.

They both can handle Air, Nitrox and Gauge modes. The Suunto Zoop can also handle free diving and has an off mode. This can be helpful if you hit the water but don’t want it to measure any time or depth which would impact your next dive.

One feature that the Leonardo has which is helpful for dive shops is that you can reset the dive computer. This allows dive shops and dive schools to have the dive computer start fresh for every new diver.

When you use the Leonardo as your dive computer then do not reset the device. To calculate the correct and safe times for your dives, it requires having information about your previous dives available. If you reset between two dives to gain more time underwater, you can risk your health!

The Zoop Novo only comes as a wrist dive computer. The Leonardo is available as a personal wrist dive computer and a console. It comes in two different console setups. One with a pressure gauge and the other with a compass.

Diving with the Cressi Leonardo or the Suunto Zoop Novo

The logbook on the Suunto Zoop is larger which means you can store more dive data on the device itself. Both scuba computers are capable to connect to a PC or Mac to transfer the data off of the device. You can then analyze and store the data on your PC. You can also plan future dives based on those historic records.

If you dive a lot and want to share your dive data with your friends and family, then the Suunto offers the better features for that. You can upload the data from your dives to the Suunto Movescount portal where you can add pictures, video and geo-location. This allows you to create a multi-media scrapbook of your dives and share it with the world!

Nitrox Handling and Sophisticated Functions

Both dive computers can handle Nitrox up to 50%. They are, as is to be expected with an entry-level model, not capable to switch gases during a dive. More sophisticated capabilities like these can be found on higher end devices.

Cressi Leonardo Dive Computer Watch -Wrist (Black/Blue)

Both dive computers use an RGBM model for their calculations. The Zoop Novo uses the Suunto own RGBM while the Leonardo is using the Cressi RGBM. Overall, the Cressi algorithm is a little more liberal while the Suunto is more on the conservative side. It’s hard to say what is better. The one thing you want to keep in mind is that if you for example use a Leonardo and your dive buddy uses a Zoop Novo then the Suunto algorithm might require a deco stop while the Leonardo does not (yet).

Reset Capability

As already mentioned, the Cressi Leonardo offers the ability to do a complete reset. This makes it a great device for dive schools and dive shops that rent out equipment. The reset will erase all data from previous dives and all calculations will start with no consideration of the past.

Other than being an advantage for this specific use case, there’s no advantage if you own the dive computer and use it as your personal scuba watch. In that case it can be problematic if you reset the device to have it ignore previous dives. You can endanger yourself and your buddy/buddies if you do that!

Missing Capabilities

Neither of them has air integration capabilities or a digital compass built-in. That is not a problem for beginners and divers that don’t dive too often.

Cressi Sub Leonardo 3 Scuba Diving Computer Console with Pressure Gauge and Compass (Imperial)

The lack of more sophisticated features doesn’t allow either of these devices to grow with your experience. This does not mean though that you will need more features anytime soon if you start to dive. You should easily be able to dive for a few hundred hours before you reach the point that you would require more functionalities. Even then you can use either of these dive computers as a backup to a higher end model.

If you want more information and detailed reviews of both devices, then check out our in-depth reviews. We have a closer look at the Cressi Leonardo here where you can find out all the details you need to know about this model. If the Suunto Zoop Novo is more of interest to you, then have a look at our in-depth review that you can find by clicking on this link.

If you want to check out how the Leonardo compares to the Cressi Giotto, then check out this post where we highlight the differences between those two dive computers. We also had a closer look at the differences between the Zoop Novo and its predecessor the Zoop.

The Zoop Novo is a good entry level dive computer. The next level up in Suunto’s lineup is the Vyper Novo. You can get an overview of the differences between these two devices in this comparison. One of the major differences when looking at any more sophisticated models is that they will offer functions to track your air consumption among other higher-end features.

Verdict

Either of these dive computers is a great choice for an entry-level diver or if you dive only a few times a year. There’s no need to think of a device with more features that costs more.

Cressi Console Leonardo 2 (Imperial)

If you are beginning to dive and you think you might end up diving a lot, it still would make sense to start with an entry-level device such as the Suunto Zoop Novo or the Leonardo Cressi. Most divers that do not live close to the water will need quite a while before they gain the experience to outgrow the capabilities of either of these two devices.

Both dive computers use a rather conservative algorithm. Some divers complain about that, but reality is that these devices make sure you stay safe underwater. For beginners it should not be a problem. If you upgrade to a more sophisticated dive computer at a later point in time you might think of going for a model that has a less conservative algorithm like for example the ones from Oceanic.

It rarely makes sense to buy a more high-end model right at the start. When a beginner gained enough experience to look the next level of dive computers, they will by then possibly have additional features that today’s models don’t have. Get the latest model of these more sophisticated scuba computers when you need one and keep your entry-level device as a backup.

If you are looking for other dive computers, then check out our buying guide and list of recommended devices. We update these recommendations regularly as there are new dive computers entering the market all the time that offer better features or are easier to use.

Cressi Leonardo vs. Giotto

Comparing the Cressi Leonardo and the Giotto

Cressi designed two dive computers themselves. The Leonardo and the Giotto. While the Leonardo targets the entry-level market, the Giotto targets pretty much any experience level in the recreational diving market.

After giving them a first glance, you see they have quite a few differences. And no, that’s not only the price point. The Leonardo is cheaper by around $100 and is one of the most affordable scuba computers you can find. The price point of the Giotto but it does in return offer more functionality.

Cressi Giotto vs Leonardo Comparison

Functionality Differences

The immediate difference you will see is that the Giotto has three navigation buttons vs. one on the Leonardo. This has advantages and disadvantages. It makes for a quicker and easier navigation through the menus as you can go back and forth with two of the buttons. The single-button navigation on the Leonardo forces you to step through each menu choice to get to the one you want to go.

However, having a single button also has a nice advantage. You won’t press the wrong button by accident. That is true if you’re diving with thicker gloves. Having three buttons can make it a little hard to press the right one in that case. Assuming though that the Giotto is used by a more experienced diver also means that one would expect that the diver is calm enough to take the time to press the correct one.

Both dive computers are very similar in size. They both provide a large and sharp display. The data displayed on the screen displays clearly and easy to read. The Giotto besides showing the standard data like depth, dive time, etc. also has a graphic CNS oxygen toxicity indicator. This measures and displays the oxygen toxicity level for the Central Nervous System (CNS).

Cressi Giotto Wrist Computer, Black/Yellow

The Leonardo and the Giotto have user exchangeable batteries. They cannot be hot-switched, meaning the current data stays while you switch,but you don’t have to bring or send the dive watch to a service center or dive shop. This makes it easier to have a spare battery with you so you change it yourself if needed. They display the current battery level on the display of both models.

Nitrox Handling and Sophisticated Functions

The Leonardo provides the basic functionality you’d expect from an entry-level scuba computer. It allows to use one gas mix up to a 50% oxygen level. Being designed for a beginner, it does not provide the capability to switch from air to Nitrox during a dive.

The Giotto can handle two Nitrox mixes up to 99% oxygen. To support more experienced and technical divers, you can switch between gases during a dive. It is also equipped with handling a Nitrox dive after a dive with air even if you’re desaturating.

Cressi Leonardo Dive Computer Watch -Wrist (Black/Blue)

Reset Capability

A feature that makes both models attractive for rental shops is that they can be reset after a dive. Many other dive computers don’t have this capability and at that moment they take data from previous dives into consideration when they calculate dive limits for the current dive. Both the Cressi Leonardo and the Cressi Giotto can be completely reset so they calculate the current dive without considering a previous dive.

Missing Capabilities

Neither the Giotto nor the Leonardo offer functionality you can find in higher end computers. Specifically, you won’t find any sort of air integration on these scuba computers. For most recreational divers this does not pose a problem. If you are a scuba instructor that needs to monitor the air levels of students or like the convenience of seeing your tank levels on your wrist, then neither the Giotto nor the Leonardo will be a good choice for you.

Cressi Console Leonardo 2 (Imperial)

The same is true for both devices not having an integrated compass. Both dive computers come in a console variant though instead of a wrist computer. The console is equipped with a second instrument which can either be a compass or a pressure gauge.

Cressi Console Giotto 2, imperial

Both the Giotto and the Leonardo come as consoles. They combine the computer with either a compass or a pressure gauge. While this is a tempting proposition, it also has its disadvantages. Go for the console if you want to see the data which can be tricky if you have your hands full, e.g. in an emergency when you help your buddy. It’s easier to look at your wrist in those cases.

This comparison only highlights the major differences between the two models. You can check out our detailed review of the Giotto here. If you lean towards the Leonardo, then have a look at this in-depth review which should answer all your questions.

Cressi Sub Leonardo 3 Scuba Diving Computer Console with Pressure Gauge and Compass (Imperial)

Verdict

If you’re a beginner and you know you will stick with the sport, then you might be better off investing the additional money into the Giotto. The additional functions allow it to grow with your experience.

The Leonardo is a fantastic beginner and budget dive computer but it has its limitations when it comes to the functionality offered. Does it have enough capability to get you through your first 100 or even 200 dives? Yes, it does. Will you hit the ceiling with what it offers afterward? There’s a chance you might.

If you’re able to pay a little more by getting the Giotto, then you push that ceiling farther out. You most likely will never run out of functionality on it if you’re recreational diving.

A big advantage of the Giotto vs the Leonardo for more experienced divers is the three-button navigation. As a beginner it might end up being a little confusing to use three buttons to step through the different features but with some experience it’s faster and more intuitive.

Before you buy any of the two models think about how long you might need to reach 100 or 150 dives. If that’ll take you a few years then go with the Leonardo. By the time you will require more functionality, there’s a good chance that the technology has evolved and you get a newer model than what is available today.

Finding the best scuba dive computer

If you think you’ll be able to reach that number in a year or two then opt for the Giotto. It offers what you need for the next years to come. There’s a good chance that there won’t be any significant technology changes by the time you reach the need to take advantage of the more sophisticated functions.

Neither of these two models will be a good choice for divers that already have numerous dives under their belt and that look for features like air integration. There are numerous scuba computers available that offer all the bells and whistles. Have a look at our overview of the best dive computers you can get. You can find this selection of top products here.

If you’re furthermore interested in devices that compare tothe Leonardo then we have done several other comparisons that might be of interest. First, we compared the Suunto Zoop Novo to the Leonardo. Both are entry-level devices that match up pretty closely in their capabilities. You can have a look at the comparison to get the information to make a good buying decision.

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Guide to Find the Best Dive Computers for Beginners – Editor’s Picks for 2019

Beginners Dive Computers

Eager, first-time divers, want to know everything about their newfound hobby. We’ve got the scoop for you on everything you need to know about dive computers. A dive computer is your digital writer lifeline, allowing you access to real-time information for the perfect dive.

Best Dive Computer for beginning divers

In a hurry?

Here are our suggestions for the best dive computer for beginners:

When you are looking to buy a new dive computer that is suitable for beginners then you should be aware of the features that such a device should offer. These standard features include:

  • Depth
  • Time
  • Emergency decompression
  • Ascent rate
  • No stop time remaining
  • Previous dive information
  • No stop limits
  • Low battery warning
  • Enriched air (Nitrox) compatibility

Quick tips for purchasing a dive computer include:

  • Being able to read the dive computer with your mask on.
  • Is your dive computer going to be compatible with your equipment?
  • Do you 100% understand the information you’re reading? If not, you’re putting your life at risk.

Navigation is Critical

When going diving you need to have a good idea where you are and where you’re going underwater. Having supporting equipment to help with navigation is important for your safety.

The more pressure you find yourself in, the more disorienting it can be. No matter how much you think you know, under the water is another story. Navigation is critical and owning a dive computer with an old-fashioned compass is pivotal in your safety. Without this, you may not know how to get to shore, or back to your boat for safety.

Life-Saving Depth Gauge

Without the life-saving component of a depth gauge, you may wander a little too far down to where you’re too disoriented to function and ask for help. A depth gauge works hand in hand with your decompression stops and calculates how much time you spent at a particular depth. If you’re left guessing, it will negatively affect your calculations for decompression stops.

The Perfect Calculations

When you’re at a low depth, it can be hard or near impossible to make any calculations yourself while functioning in the water world around you. Dive computers take out this stressful aspect for you and perform the calculations for you. These life-saving calculations work alongside decompression calculations, decompression stops, and specific models offer calculations of no-fly times for those who are diving on vacation.

It sounds morbid, but when you ascend in a plane after diving into a certain depth, the nitrogen in your body will expand because of the pressure. You may explode! (No, seriously, it’s a thing and you need to adhere to some safety precautions). Some dive computers will let you know when you can safely fly again.

Finding the best dive computer for beginners

On-Board Memory

Most modern dive computers will have an onboard memory feature for you to review all the information stored away during your ascent into the aqua world. It’s a nifty little feature and can help you predict and plan for future trips down.

Activation of Your Dive Computer

Any dive computer bought will have to go through an activation process, much like a phone. Thankfully, you don’t have to activate your phone with water, though! There are two ways to enable a dive computer for beginners including manual or water activation. The manual option requires the diver to press a button before going in the water.

If you’re new, I should forewarn you that many divers FORGET this aspect of preparation, causing companies to come up with a solution that allows instant water activation as soon as divers are in. Now that you’ve got the scoop on the different life-saving and data recording components, we’ll go over our top three picks (and our top recommendation!) for the perfect dive computers for beginners.

#1 – Cressi Leonardo

Cressi Leonardo, black/blue

Not overly clunky and super fashionable, the Cressi Leonardo is one of the best on the market. Its design is sleek and not bulky/heavy, so you won’t worry about it in the water constantly, with features that include:

  • Audible alarm
  • Easy on button
  • Air and nitrox modes
  • Large digits for better reading underwater
  • Backlit screen for night dives

Not only does this dive computer give you a readout for the different depths during your dive, but you can also read these numbers with no issues at night. The backlit screen function allows for safe tracking during dangerously dark dives. This device also has a data reset feature, which is perfect for rental companies working with beginners. This may be the only downside, as beginners may accidentally stumble into this section and delete their hard-earned data.

Another significant aspect of this computer dive watch is the audible and visual automatic safety stop countdown at 15 ft or 3 minutes. A wrist-held safety buddy, there’s no real reason you shouldn’t purchase this as a beginner! This dive computer has a 24-month limited warranty.

We have reviewed the Leonardo in detail and you can view it at https://www.deepbluediving.org/cressi-leonardo-dive-computer-review/

#2 – ​Suunto Zoop Novo

SUUNTO Zoop Novo Wrist Scuba Diving Computer, Black, Without USB

The Suunto Zoop Novo is the successor of the Zoop. It’s gotten a little bulkier and has several added features and functions compared to the first version of entry-level wrist mounted scuba diving computers by Suunto.

The size is overall easy to manage and navigation is super easy with four dedicated buttons placed around the display.

Both other devices we listed in this guide have a single button for navigation. At first glance this is an easier design, but it has a disadvantage. If you page through the different menu options with a single button you have to step through each option as you cannot go back and forth with a single button. A design with multiple buttons lets you go back and forth as needed and can make it easier to get to where you want to be in your menu options. Having a single button simplifies the overall handling but can make it a lengthy process to get where you want to be in your navigation options.

The Zoop Novo is the entry-level dive computer by Suunto. It comes in different mounting options with the standard variant being a wrist mounted design but there are also versions where you can get it as a console mounted device. The overall features are targeting divers that only need the basic set of features and functions:

  • Air/Nitrox/Gauge/Freedive/Off modes
  • Audible and visual warnings and alerts
  • Four-button navigation
  • Large display with all data at-a-glance
  • Large log book with up to 140 hours of data

This is a no-nonsense dive computer with all essential features and functions for a beginner. It’s easy to use and makes it easy to read the information on the display. The back light is strong enough to allow you to read the data on the screen in dark and murky waters..

The computer uses Suunto’s own RGBM algorithm. This specific algorithm is seen as rather conservative. You can adjust the algorithm if needed, but that only allows you to make it even more conservative.

The Suunto Zoop Novo is a great scuba dive computer, and it’s hard to find real negatives about it. You won’t get all the bells and whistles but that’s what you’d expect from an entry-level device for a beginner. It offers all the required basic features and you’ll be diving for a while before you look at any higher-end functions.

Our in-depth review of the Suunto Zoop Novo can be found here. Please check it out if you need any further detailed information.

#3 – Mares Puck Pro Plus

Mares New Puck Pro Plus Black/White

The Mares Puck Pro Plus is the latest rendition of the original Puck scuba diving computer. In case there’s any confusion about the name, it refers to a hockey puck regarding shape and size.

You can find many other wrist mounted dive computers that are smaller or that you can even wear as your daily watch. If that’s your criteria then the Puck Pro Plus is not the best device for you!

It’s designed as an entry level gadget that provides all basic features you would expect and need:

  • Air/Nitrox/Gauge modes
  • Visual and audible alarms
  • Single button navigation
  • Clear and easy to read display​
  • Bluetooth connectivity

The biggest improvement Mares had in store for the Puck Pro Plus is the Bluetooth connectivity. No more cables required to exchange dive data with your computer!

The display received a few minor changes and is as excellent as it has been on the Puck Pro. Large numbers that make it easy to read combined with a strong back light so you can still see all information in dark environments.

The Mares Puck Pro Plus is a solid contender with all necessary features and functions you’d expect from an entry-level scuba computer!

If the Mares Puck Pro+ is a scuba computer that is of interest to you then check out our in-depth review!

Recommendation

We think the best dive computer for beginners is the Cressi Leonardo. While the version with the stand and USB connector are nice, it’s not a necessity.

You might as well save yourself some money and go with the basic model without all the connectivity items.

You’d thought we would recommend the last one? While the added features are helpful, they aren’t essential to most dives, and you can get those higher end features with a more complex device at a later time. For beginner divers, it’s important to feel out the piece of equipment instead of splurging on the biggest package possible. If you enjoy this watch and want those added features of a download cable and stand, those accessories are available online.

For beginners, this watch is fantastic. With large fonts, sounds, and all the readings you can hope for no matter the time of day, the Cressi Leonardo hits the nail on the head.

Aqua Lung Dive Computers

Aqua Lung is a legendary name in underwater equipment, having produced the first diving regulator to reach worldwide popularity after it was developed by Jacques-Yves Cousteau and Émile Gagnan in 1943. The company continues to represent a standard of quality in scuba equipment.

Dive computers are one of the most helpful advances in the field, and it’s no surprise that Aqualung has a diverse selection of highly regarded models. In this article, we’ll review a selection of their dive computers, including a new unit just coming to market.

 
Product Features
Best for
Aqua Lung i100

Aqua Lung I100 Wrist Dive Computer Blue


Read full review
  • Wrist-mount
  • Easy to use
  • Single button navigation
Beginner
Aqua Lung i200

Aqua Lung i200 Scuba Dive Computer


Read full review
  • Mounted on wrist
  • Lightweight
  • 4 Button Navigation
Somewhat experienced diver
Aqua Lung i300C

Aqua Lung I300c Wrist Dive Computer with Bluetooth Black/Blue


Read full review
  • 2 button navigation
  • Wrist or console mount
  • Plenty of features
All around recreational diver
Aqua Lung i450t

Aqua Lung i450t Hoseless Air Integrated Wrist Watch Dive Computer w/ USB, Black


Read full review
  • 4 button navigation
  • Wrist mounted
  • Tons of features
Serious recreational diver
Aqua Lung i550

Aqua Lung i550 Dive Computer (i550 Dive Computer)


Read full review
  • Console mount
  • 2 button navigation
  • Optional compass
Divers prefering console
Aqua Lung i770R

Aqua Lung i770R Dive Computer W/USB (i770r w/Trans)


Read full review
  • Wrist mount
  • Color screen
  • Wireless air integration
Technical Diving

Choosing a Dive Computer

Overview

Dive computers have become popular in scuba diving for their ability to make the experience safer and more convenient. These high-tech devices monitor and centralize data such as dive total time and time remaining, depth, mixture status—and handle the calculations that experienced divers have been doing for decades.

Considering the volume of metrics and ongoing computations necessary for a safe trip, dive computers represent an almost revolutionary advance for both recreational and technical users.

There are a few critical factors that go into the decision. You will want to evaluate price and aesthetics, but these are personal preferences. The most important qualities to consider for a recreational dive computer are reliability and convenience. It’s not necessary to acquire every feature to gain a lot of benefit from these handy devices.

Reliability

Safe diving is the utmost priority in scuba gear. You need to be able to rely on your equipment. This is why brand manufacturers are so important in diving: you want the experience and quality that come with a well-regarded name.

Convenience

Recreational diving should be as safe as possible, but the motivation is enjoyment and discovery. Regardless of your experience level, you want a dive computer that is straightforward to setup, intuitive to learn, and easy to operate. No diver at any level wants to fight with their equipment.

Choosing a Dive Computer

Finding the right dive computer begins by answering some questions about your needs.

Q: What is your experience level?

It may seem that high-end automation is the way to go for beginning divers, but that’s not always the case. A good dive computer helps monitor your equipment and perform the calculations needed for a safe dive: but it is not necessarily a beginner’s tool. Too many options and information streams can cause overload and, ideally, newcomers should learn about sound diving practices before automating them away.

Q: What kind of diving trips do you plan?

The dive you’re making determines the equipment you need. You want appropriate complexity and useful scope–not blinking, beeping overload.

If you intend to make long, technical, deep dives, you will require precision and sufficient monitoring to handle decompression times and other limits. Even the most occasional recreational user benefits from automated tracking and alarm signals. It’s good to have a pocket buddy—though it doesn’t replace a real one.

Q: What are your technical requirements?

Your equipment dictates the computer you need. Wireless air integration is a convenience, for example, but some divers still swear by their console gauges. If you use a rebreather, your computer should be able to track your gas mix and offer a reliable bailout system.

On the other hand, if you’re only interested in shallow recreational diving, you don’t need—or want—to have enough computational power for the space program on your arm.

Important Features

While many features of dive computers are widely useful, some are reserved for specific diving practices … and some are mere preferences.

Mounting

Dive computers can be console-mounted, but recent technology allows for miniaturized systems contained in a wrist-mounted unit. Such wonders come at a cost, but it’s hard to beat the convenience. Also, the coolness factor is definitely in play with watch-sized units.

Modes

The operating mode is set according to the dive you plan. The 4 basic modes used by Aqua Lung are Air, Nitrox, Gauge and Free Dive. Some specialized units offer other gas mixes such as Trimix.

The Air setting is based on the natural profile of air (21% oxygen), and is the main mode for recreational diving. Nitrox mode allows you to choose the gas mix, for which the computer will adjust its algorithm.

Free dive mode provides more frequent sampling. You can swim up and down as much as you’d like, as the computer keeps you within table limits. The Gauge Mode turns off the fancy computations and just gives basic information about your depth and submerged time.

Display & Navigation

Many dive computers have a basic two color display, but there are an increasing number of full color models coming to market. Thin Film Transistor (TIF) technology makes a vivid color display, but be aware all that beauty eats batteries and can be hard to see in sunlight. An intuitive layout is important, and you want a coherent menu system with nice-sized buttons. Buttons can get very small when wearing gloves.

Power Options

Dive computers are battery powered, and some models require the user to mail their camera off to have its battery replaced. This is rather a pain, especially when there are user-replaceable models that take rechargeables.

Connectivity

If keeping dive logs is important to you, make sure you get a unit that automates downloading onto your preferred device. It saves you a lot of manual entry work, plus it makes it easy to stay current with software updates. You can get integration with Bluetooth too.

Extras

Various dive computers offer an assortment of features, so it’s best to have answered the above questions and have an idea of what you want. You don’t end up too deep in extraneous gadgets.

Air integration

This is a big one. Wireless gas integration via transmitter is a popular and convenient addon. The best units quickly restore a lost connection.

Built-in compass

This is basic equipment, so if you need this feature its best to check out reviews before deciding. Some dive computer compasses are far better than others.

Gas Mix Settings

If you dive using a gas mix, you can have the settings programmed for fast switching. There are different mixes and computer capabilities to match your diving profile.

Check out this video for a discussion of the history and other information about dive computers.

Aqua Lung i Series Reviews

Aqua Lung i100 Wrist Computer

The i100 is Aqua Lung’s most basic dive computer. This wrist-mounted unit is a stripped-down model designed for light recreational use, and it establishes a performance standard for the rest of the line.

The i100 is lightweight at just over 8 ounces, and carries a buckled strap long enough to fit dry suits. The interface includes a large high-visibility LED display with big letters, and audio for safety alerts. Screens show your status, including no-fly and full desaturation times, and a record of your last dive time made within 24 hours. Measurements can be imperial or metric.

Aqua Lung I100 Wrist Dive Computer Blue

The single button menu system is easy to read as it cycles through each set of options. You can choose between 4 operating modes: Air, Nitrox, Gauge and Free Dive. You can program 2 Nitrox gases, which are changeable underwater, and choose between salt or fresh water.

The i100 offers automatic altitude detection, and allows switching between Dive and Free Modes without waiting for a stop period—a convenient feature, though caution should be exercised.

The lithium ion battery can be conveniently changed by the user, and offers data retention so you can keep your settings during a switch.

It’s a great basic unit with just a few downsides. You can purchase an add-on cable for networking, though options are minimal. The LED display lacks backlighting, so the display can be hard to see without another light source. Bummer.

If you’re looking for a wrist-mounted dive computer without a lot of extras, the i100 handles the basic computations that make these devices so valuable. It’s a good basic unit from a premier name.

Pros

  • Lightweight wrist mount with long strap
  • Simple, easy-to-read menu navigation
  • Automatic altitude detection
  • User-changeable battery with data retention
  • Unrestricted switching between Dive and Free modes

Cons

  • Separate cable required for downloading
  • No backlighting on LED display screen

Aqua Lung i200

The i200 wrist-mounted dive computer has all the features of the i100 with a beefier performance profile. It can also do double duty as a land wristwatch and receive only complements.

The display is smaller than the i100, but it does come with a backlight. The i200 ships out at 9.6 ounces, and has a high visibility LED alarm light. Status information such as depth, dive time, ascent rate and safety stops are easily checked.

The straps are an attractive black and have a velvety feel. An extender section is included that lengthens over a wetsuit.

Aqua Lung i200 Scuba Dive Computer

The multi-button menu is intuitive—though the manual is not. The graphics-oriented manual has proven unintelligible to some. On the plus side, the battery is user-replaceable and keeps your data alive during a switch. There are 4 operating modes—Air, Nitrox, Gauge and Free Dive.

Downloading can be done with the separately-purchased cable. You can also purchase the DiverLog software to view Logs and profile information, and use it to manage your dive computer settings and add photos and other trip details.

This is a great entry level dive computer that can handle most recreational needs. It’s nice looking, has reliable performance and is easy to operate.

Pros

  • Attractive wrist-mounted design
  • Simple menu navigation with multiple buttons
  • Automatic Altitude detection
  • User-changeable battery and data retention
  • Unrestricted switching between Dive and Free modes

Cons

  • Separate cable required for downloading
  • Indicator light fragile attachment

Aqualung i200 vs Mares Smart

The Aqua Lung i200 and Mares Smart are pretty similar in looks and capabilities. Both are designed to be worn at the wrist. They are not too large so some people can use them as their regular wrist watch too.

Both of these dive watches are for recreational divers. They do not offer air integration or other advanced features but instead are easy to use.

The feature set on both is very similar with gauge, free diving, air, and gas mixture modes. A slight difference is in the way the devices are navigated. The i200 has four buttons vs the two on the Smart. It’s neither a big advantage nor disadvantage to have more or less buttons as you get used to both. Usually, on a small device like this it can be a little more tricky to use four buttons when you have thick gloves underwater. But in the end it comes down to what you’re used to.

They both are affordable dive computers that will keep you safe underwater. With features lining up that closely and pricing being around the same, it’s hard to give a straight recommendation. The Smart is probably a little better established and more commonly found. It’s also available in a number of color combinations while the i200 only comes in black.

In the end you can’t go wrong with either of these dive computers if you look for a device for beginner or occasional divers. Both of them can also be used as reliable backup devices should you outgrow their offered capabilities.

Aqua Lung i300C

The newest model on the list, the i300 is great all around dive computer with a few extra features that won’t overpower a newcomer. It takes a step forward in connectivity too.

The screen is sharp and clear high-def LED. Backlighting has a whole button dedicated to its use, a radical upgrade of function since the i100. The menu system is straightforward to navigate, with prominent stainless steel buttons. The LED screen is a bit smaller than some competitors, and is slightly less legible than sharper dot-matrix displays.

Aqua Lung I300c Wrist Dive Computer with Bluetooth Black/Blue

The computer itself is reliable and capable. A Pre-Dive planning feature gives you a safety preview of your dive, and there’s a water activation feature so you can jump in without worry about missing a start.

The i300 supports the standard 4 operating modes for Air, Nitrox, Gauge and Free diving, and handles up to 3 gas mixes. You can switch immediately between Free and Dive modes. The battery is conveniently user-replaceable.

Where this model should shine is the advertised enhanced connectivity that includes Bluetooth. The DiverLog+ app is free, but you have to pay for the software … and you still have to buy the proprietary overpriced cable for downloading. It’s hard to say this major marketing point is much in evidence.

There are other reasons to choose the i300 though. It outperforms many dive computers on the market despite with its recreationally-focused features. It’s the new kid on the block, but with the Aqua Lung name behind it you have a very complete piece of equipment. The i300 may be all you ever need if you’re just starting out and have recreational or light technical goals.

Pros

  • Attractive wrist-mounted design
  • Easy menu navigation
  • Automatic Altitude detection
  • Pre-Dive planning preview
  • User-changeable battery and data retention
  • Unrestricted switching between Dive and Free modes

Cons

  • Separate cable required for downloading
  • Indicator light has a fragile attachment

Aqualung i200 vs i300C

It’s clear that both the i200 and the i300C are excellent wrist-mounted dive computers. They both target the recreational diver.

The i300C, as indicated by the higher model number, is clearly geared towards a more experienced diver and the needs that come with that experience. It offers better connectivity as well as planning capabilities that the i200 does not have.

That does not make the i200 a bad device in any way. It is probably better suited for the occasional diver or as a backup computer. The higher end model on the other hand is a great companion for a diver that regularly is underwater and has more demanding requirements.

Take a hard look at your diving needs before you decide between either one. If you’re torn then go for the i300C as it won’t run out of features and options anytime soon while it still can be used by an inexperienced diver. The i200 is a good model but you might ask for more capabilities if you dive a lot.

Aqua Lung i450T

There’s a competent look of solid gear to the i450’s boxy exterior. The attractive metallic housing has a 4-button operation, each placed within raised molding. The little things matter. It wears comfortably due to a specially conditioned inner strap that reduces slipping, chafing and heat spots.

Up to 3 Nitrox mixes can be managed with 3 unique transmitters. There’s an easy-to-read, sectioned screen with a crisp dot matrix display in the center area. It is water-activated, and Auto Altitude adjustment is included too.

Aqua Lung i450t Hoseless Air Integrated Wrist Watch Dive Computer w/ USB, Black

You can add a transmitter for wireless air integration, and the i450 will pair up with a transmitter for life. There’s a visual ascent warning for safety, a built-in compass, and a download cable and strap extender. Pre-Dive planning feature allows a preview of a planned trip.

There are potential issues and some quirks. Interestingly, the i450t in black has a PVD (Physical Vapor Deposition) finish and is priced higher than the other colors of blue and white. Also the compass is accurate but a bit small, and a little practice on the surface is advised before relying on it. Some i450 users resort to an analog compass for serious navigation.

There’s not much against this model, but some owners have had issues with losing charge quickly. The good news is that the problem appears immediately upon use if it exists, and Aqua Lung is known for taking care of customers. Just pay attention to the warranty period. To ease the odds, the battery is user-replaceable and your data is retained.

Since you must know, their DiverLog software is widely panned. It seems the light free version is actually better. If you are interested in download and electronic log book functions, you should probably test this out before committing.

Overall this is a reliable machine for experienced divers who want high performance and a great-looking design … or serious new divers who want room to grow. This solid unit also makes a backup able to stand in for a more sophisticated computer if needed.

Pros

  • Attractive wrist-mounted design
  • Easy menu navigation
  • Dot matrix center display section
  • Air integration with up to 3 independent transmitters
  • Automatic Altitude detection
  • Pre-Dive planning preview
  • User-changeable battery and data retention
  • Unrestricted switching between Dive and Free modes

Cons

  • Separate cable required for downloading
  • Battery power can drain quickly

Aqua Lung i550

The i550 is a console design that offers the underlying functionality of the standard line. It includes Gas integration and has a notably easy-to-read display. The bold display letters and clean layouts make it easy to check the screen with a glance—but be warned some of the acronyms require the instruction book to understand.

There is a simple two-button interface and a straightforward menu. It can handle 3 gas mixes and 3 modes: Air, Nitrox, and Gauge. The battery is user-replaceable and has data retention. The inner workings have the normal safety alarms and an exterior LED for a visual signal.

Aqua Lung i550 Dive Computer (i550 Dive Computer)

The i550 has a few extra options, including an analog Compass and a quick-disconnect system. You can also purchase their download cable to automate your log entries.

The i550 is great if you’re looking for a crisp, legible display. Along with the line’s many safety and performance features, if you’re looking for a console computer, this is one to consider carefully.

Pros

  • Highly visible, legible display
  • Wireless gas integration
  • Pre-dive planning preview
  • User-replaceable battery

Cons

  • Download cable must be purchased separately
  • No Free diving mode

Aqua Lung i770R

Aqua Lung’s top of the line dive computer model has all the integral components together with a full-color screen, a replaceable battery, and wireless air integration. It’s a lot for an inexperienced diver to manage, but enough of the settings are optional to make it one to grow on.

The wrist mounted unit is basically a small color screen secured with wide comfortable straps: it’s workmanlike and feels great, but it is not made for a night on the town like Aqua Lung’s wristwatch designs. This computer keeps its focus on diving.

Aqua Lung i770R Dive Computer W/USB (i770r w/Trans)

The screen is a bright, high-visibility (TFT) full color screen, well laid out with a 3-button interface that is easy to learn and navigate. You can easily monitor your information. The LED light signal and low-intrusion audio alarms help you keep things within limits without too much distraction.

Aqua Lung’s 4 operating modes are available—Air, Nitrox, Gauge and Free Dive—and can be programmed for up to 3 gas mixes. Hoseless gas integration comes standard on the i770R, and you have the ability to monitor 3 different transmitters. The settings are maintained, so you only have to pair your transmitter once.

A download cable is included with the unit without separate purchase. You can also use Bluetooth to transfer data, and can purchase the DiverLog+ app to manage your logs. It all comes professionally wadded into a hard carrying case. There’s a bungee and a trendy NATO wristband too.

The two main negatives of the i770R are lack of display visibility in sunshine, and issues with poor battery life. The color screens are great when out of the sun, but there is some washout in direct light. This isn’t an issue with the unit so much as with the technology, and simply shielding the display is annoying but it works.

Color screens are a power drain, but concern about battery-life is moderated by the fact the CR batteries used by the i770R are common, cheap and user-replaceable. Rechargeable CR’s are also available.

Pros

  • High-visibility (TFT) full-color screen
  • Air integration with up to 3 independent transmitters
  • Lifetime transmitter pairing
  • Automatic Altitude detection
  • Pre-Dive planning preview
  • User-changeable CR battery with data retention
  • Unrestricted switching between Dive and Free modes
  • Connectivity options including Bluetooth

Cons

  • Screen washes out in direct sunlight
  • Battery power may be limited

Conclusion

Aqua lung is a famous name, and they have fulfilled expectations with their comprehensive line of dive computers. The company acquired know-how from the foremost maker of quality consumer dive computers, Oceanic, and have put their safety-first recreational stamp on the underlying designs with positive results.

The target audience of Aqua Lung’s dive computers is serious recreational divers, and their line meets the requirements of reliability and convenience. Whether you are a newcomer or a more experienced user that doesn’t use decompression, there are a lot of choices in the Aqua Lung line up.

All Aqua Lung i-series dive computers employ the same conservative algorithm, which makes it easy to buddy up with, or to use as a backup. You might even find yourself using an i-series unit as a backup computer for more technical trips.

Shearwater Research Teric Wrist Dive Computer Review

Computer technology has brought significant developments in diving safety, performance, and convenience–advancements symbolized by the sleek, Bond-like multi-purpose computer wristwatch. The future is here, and it’s under warranty.

As an experienced diver, you are prepared to invest in your equipment and knowledge to do the research necessary to sort through available options and features. In this article, we’ll review Shearwater Research’s Teric wrist-mounted dive computer and see how it compares with the competition.

Shearwater Research Teric Wrist Dive Computer

Purchasing a dive computer for experienced and technical divers

Even experienced divers vary their locations and technical demands—and we all seek flexibility and the convenience of automation. A quality dive computer requires solid performance and monitoring capacity, preferably in a unit that adjusts to the conditions of your dive.

Reliability is non-negotiable for diving equipment. You want a well-designed model with a solid warranty from a reputable manufacturer: preferably one with experience in the advanced diving market. A dive computer should be well-designed and constructed to resist corrosion and degradation from routine wear.

Only you can decide upon the versatility you need, so match those needs against your final selection. You will enjoy the ability to customize features, but without sacrificing technical precision or craftsmanship. Some wrist-mounted dive computers with broad applicability lack the specialization you need, so you’ll have to decide what matters most.

Don’t forget the day-to-day experience either! Consider the intuitiveness and usability of the menu system and display, and the level of automation you desire. Ideally, you’ll find the right balance between the precision and control you need, and the automation and convenience you want.

Presenting the Shearwater Teric

The Shearwater Research Teric is a high-performance technical dive computer housed in a distinctive and attractive wristwatch. It is made with recreational divers in mind but includes high-end technical capabilities for versatility and range.

The Teric is simple to operate, but its complexity is over-the-top for beginners. If you’re experienced and know what you need, however, this unit puts style into cutting-edge performance. The unit’s five dive modes cover depth conditions of up to 656 ft (200m) and automate everything from turning itself on to tracking your dive parameters and uploading your log when done.

Since the Teric provides performance and versatility in a great-looking wrist-mounted computer–along with its loyal customer base and early adopter interest–it is unsurprisingly priced at a premium. There are cheaper computers you can find. As a quality instrument, however, it makes sense to consider the Shearwater Teric more closely.

As an added consideration, the Teric can quickly change its face to double as a land wristwatch—it’s a downright bargain when viewed as part of the market for high-end timepieces.

Pros

  • Multiple dive modes
  • Easy-to-read, customizable display
  • Automatic log tracking and digital integration
  • Attractive design
  • 2-year warranty

Cons

• Premium pricing

• Recent to market

• Some supply issues reported

Features & Benefits

Multiple Dive Modes

The Shearwater Teric comes with five different diving mode settings for versatile performance, so you can quickly change the configuration according to your intended dive.

You can configure specific sampling rates for different kinds of diving, and monitor time-to-surface numbers for pre-planned gas switches. The Teric allows you to program unique mixes for each mode, with multiple gas definition presets for any combination of nitrogen and oxygen, and also helium for use in other than the recreational mode.

Recreational

For use during no-decompression diving activities. This mode can monitor three gas mixes and uses nitrogen and oxygen only (no helium). The setting includes an adaptive safety stop and No Decompression Limit (NDL) Bar Graph so you can see how much time you have before a mandatory decompression stop. Enhanced warnings keep you informed about your limits during a casual dive.

Shearwater Research Teric Wrist Dive Computer

Open-Circuit (OC) Technical

For use on technical dives, including planned decompression. 5 OC gases with full Trimix enabled by default. There are no safety stops, and Time-to-Surface (TTS) is prominently displayed throughout the dive.

Closed-Circuit/Bail-Out

Designed for monitoring a closed-circuit rebreather, with Bail-out (BO) operation and quick switchover to Open Circuit use. Constant PO2 is maintained to minimize decompression restrictions, and you can program up to 5 OC/5 CC gases.

Gauge

Simple monitoring of dive time and depth, with resettable stopwatch and timer functions. No tissue tracking or decompression monitoring.

Freedive

This mode shares most features of the other dive modes, with the addition of special monitoring that applies to free diving. The large layout format is enabled by default and displays the Last Dive Time and Max Depth. Ascent and Descent indicators can be set in 1-second intervals.

Advanced Display Features

The Teric inherits and advances the innovative screen functions of its predecessor, the Shearwater Perdix, a unit well-regarded for its readable and intuitive display.

  • A Sizeable 1.39 in (35mm) AMOLED screen offers a vivid full color, high-resolution display that is easy to read underwater.
  • The sapphire crystal face is highly scratch resistant: it rates as a nine on the Mohs hardness scale, just below diamonds. The casing buttons and bezel are made of 316 stainless steel, so you don’t have to worry about rust or salt corrosion.
  • The 4-button Teric interface is even easier to navigate than the 2-button Perdix menu system. You can also program one button for single-press access to specific functions for quick access to your most useful tools. You can configure the screen to different layouts and font sizes, and to display the exact information you want to see at a glance.
  • Alarms can be set for either haptic (vibration) or audible alerts, so you can choose your preferred method and avoid bothering nearby divers too. Besides dive alerts, you can set 2 independent alarms to trigger daily, with options for weekdays/weekends and adjustable snooze time.
  • The Teric provides a three-axis, tilt-compensated digital compass. Its readings show on the outer edge of the display.
  • You can configure the home screen, so the information you most need is conveniently displayed.

Changeable Face

Another handy feature is the ability to change the watch face for use as a regular wristwatch. There are three faces–Digital, Analog, and Orbits—and you can set over 100 possible configurations using the three information levels and different faces and color combinations.

The Dive Mode automatically switches to Watch Mode after 15 minutes on the surface. It will remain powered, but the dive computer turns off its main functions after 20 minutes if no motion is detected.

Watch Tools

The Stopwatch setting operates across all dive modes and runs up to 24 hours even if turned off. There is a Timer function too, and a Flashlight setting that brightens the display—it won’t illuminate the ocean deeps but may be useful at close quarters in low-light conditions.

Rechargeable battery

The Teric is powered by a lithium-ion battery rated for 5+ years of use. It is wirelessly recharged in about 1.5 hours when using the docking station, and can also be charged with most Qi-compliant pads. Depending upon the settings, a single charge lasts from 30 to 60 hours.

One inconvenience is that the battery requires a dealer to change. No swapping out spares, so you need to remain aware of the battery status.

Digital integration

The Teric is equipped with Bluetooth Smart technology so that you can upload your dive logs automatically to your preferred device. It’s compatible with Mac, Windows, iOS, and Android, making it easy to update your system and manage your information.

Warranty & Service

The Teric comes with a 2-year warranty, and Shearwater Research has a positive customer service record. Each Teric has a unique serial number that doesn’t require registration and can be transferred if sold.

Options

The Teric can connect wirelessly with up to 2 transmitters, but you must purchase this equipment separately. The feature can be added at any time, however, if you aren’t sure about making the outlay quite yet.

The wristband comes in several optional dual-color schemes you can purchase additionally: Pink, Blue, Green, White, and Yellow. The straps are interchangeable with any 22 mm watch band type.

Social Proof

Hearing directly from users about their experience is essential to any objective evaluation, and the Teric is already attracting favorable attention. Here are a few samples of user feedback found online:

Alternatives

Aqua Lung i450T

The Aqua Lung i450T is a wrist-mounted dive computer introduced in 2016 and remains one of the excellent competitors to Shearwater’s Teric. The 1450T was stylish for its time and shares the theme of flexibility and convenience the Teric has developed further.

The i450T features four diving modes, lacking the CC/BO rebreather mode and higher automation of the Teric’s recreational settings. The display is intuitive and easy to read, though it lacks the color and highly customizable interface that makes the Teric stand out visually.

The i450T excels at air integration, offering control of up to 3 transmitters instead of Teric’s dual capacity. Its battery is replaceable by users too, so you’ll be saved a trip to the dealers when its time to change.

Overall, Aqua Lung’s unit today represents a pared-down feature set when compared to the Teric, but it’s a reliable tool at a slightly lower cost.

  • Stylish but single-color face
  • Lacks rebreather monitoring
  • User-replaceable battery

Suunto D6i Novo

The Suunto D6i Novo is an established wrist-mounted dive computer that is a close competitor to the Teric and comes with a similar price tag too. As an older model, it has a bit less under the hood than Shearwater’s latest effort, but it is well-tested and reliable.

SUUNTO D6i Novo with UBS Wrist Scuba Computer - Stone

The D6i is excellent for free diving, and the longtime market presence of Suunto makes it easy to find assistance across the world. It doesn’t have a mode for CC/BO rebreather tech, but it has similar automation to the Teric—including an optional transmitter and the need to have its battery replaced by a dealer. The D6i has a duller, black LED face, and small buttons that have been known to stick without extra care.

The D6i is well-regarded by professionals, and it’s in the same price range as the newer Teric. It doesn’t have quite the same level of digital integration or automation, but it’s still a solid choice if you have the budget.

  • Small buttons
  • Lacks rebreather monitoring

Oceanic Oci

The Oceanic Oci is an older model that combined the technical advancement of the OC1 with the stylish and popular OCS model. It is in the same price range as the Shearwater model, and looks great and performs well.

Oceanic OCi Wrist Wireless Air-Integrated Dive Computer Complete

Though it lacks full-color display or the Teric’s versatility and range, the Oci is established and offers all most recreational diver’s need. You get four wireless transmitter capacity, and user-replaceable battery power, and an established customer base.

The Oci package includes the transmitter, which makes it more affordable than the Teric if you need air integration. It’s an older model that compares favorably concerning reliability, and its slightly smaller feature set present a less complicated tool for less experienced divers.

  • Includes wireless transmitter
  • Lacks full-color display

Conclusion

It’s hard to keep up with the latest innovations: you want the best of essential advances while avoiding the gimmicks. An advanced diver can’t sacrifice precision and reliability, but versatility and ease of use are critical for day-to-day convenience.

Shearwater Research Teric Wrist Dive Computer

Good looks don’t hurt, and the Shearwater Teric offers it—along with the solid performance demanded by experienced divers. The Teric represents the next generation of dive computers and gives the flexibility to meet most diving techniques and occasions. It’s a diving computer with style.

Check the Teric out for yourself! Leave your thoughts in the comments below! We love to hear from you and see you share your experiences below!

Oceanic VTX Dive Computer Review

Experienced divers find that a modern dive computer is a great tool. Instead of the old Navy tables for making the careful calculations that go into a safe dive—today’s computers can monitor and calculate your dive’s parameters, making the experience more reliable, more comfortable and more fun.

The Oceanic VTX dive computer offers a new design that is stylish and convenient. The unit includes innovative features along with the precision of a quality instrument. In this article, we’ll take a look at this popular model and how it might—or might not—work for you.

Oceanic VTX OLED Complete Scuba Computer with Transmitter

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Things to consider before buying a technical dive computer

The Oceanic VTX is a technical diver’s tool that meets the needs of the recreational user. This is an important step forward for scuba diving because the profile of a recreational dive is difficult to calculate—instead of descending to perform a task and then resurfacing, a recreational diver tends to alternate depths frequently, going up and down several times during an excursion. A dive computer automates the necessary calculations for you.

If you like the idea of a single display with your dive information, the wrist-mounted VTX deserves your attention. Not only will the unit keep your gear streamlined and conveniently accessible, but it’s also contained in a stylish modern design.

A quality dive computer can be expensive, and a beginning diver will want to gain experience before making the outlay. New divers usually start out with rental equipment and necessary tools. The Oceanic VTX is best used by more advanced divers who already have a base of knowledge and experience, who are looking for a stable and reliable tool to augment their dive.

Important Considerations

  • Reliability & Warranty
    Safety is the first requirement for diving equipment: dive computers are a form of integrated circuit, so they are generally quite reliable. You still want to check the reputation and experience of the manufacturer, as well as technical reviews and user feedback.
  • Settings & Display
    Dive computers can monitor some dive parameters, such as depth, pressure and dive time, so make sure your chosen model offers the stats you want. Check out the display clarity and convenience, as well as the menu system and how easily you can adjust settings. You don’t want to waste time fiddling with your equipment during a dive.
  • Power options
    The array of features in a dive computer increases power consumption. Since portable power is necessary for the unit, battery life is an issue. Plan your power replacement strategy to avoid complication.
    Some units have rechargeable options and power-saving settings to extend battery life, which can make a difference if you plan long trips. Be aware that some batteries are hard to change or even require a dealer’s installation to preserve its warranty. Avoid batteries that drain quickly but are problematic to switch out.
  • Premium Features
    Many technological advances offer convenience and performance during your dives, but few are standard: make sure to get the features you most want. You may prefer wireless gauges to hose attachments, or need logging capacity and Bluetooth integration—there are many add-ons possible but expect to pay for the latest bells and whistles.

Oceanic VTX OLED Computer and Transmitter

The Oceanic VTX is an air-integrated, wrist-mounted dive computer made by one of the most respected scuba gear manufacturers in North America. It offers a combination of competitive technical features in a fashionable design.

The VTX’s sleek design offers a wireless transmitter for air-integration and a patented air time remaining algorithm.

One of the premium features of the VTX dive computer is its high contrast OLED color screen. The clean, intuitive push-button menu system shows up to 4 Nitrox mixes along with your dive parameters. It is powered by 2 CR123A batteries that can be easily changed by the user.

The VTX isn’t a beginner’s device, but it provides a sleek interface and reliable performance for experienced divers. It’s great for streamlining your dive—and it looks great in and out of the water.

Pros

  • Precision dive computer
  • Convenient wrist-mounted device
  • Wireless air integration
  • Sleek and attractive design
  • OLED color screen with brightness settings

Cons

  • Limited battery life on higher settings
  • The screen can be difficult to see in direct light
Oceanic VTX Dive Computer

Features & Benefits

Air Tank Integration

One of the most popular convenient features of modern dive computers is integration with your air tank, with a wireless transmitter instead of a hose. The Oceanic VTX offers this form of air-integration, so you have a remote control and can monitor your gauges with just a glance.

The system tracks up to 4 Nitrox mixes, with individual PO2 set points for each. Connectivity is an issue with any transmitter, and the VTX restores lost connections automatically within reasonable proximity.

Gauge & Settings Display

The wrist-mounted display is a primary feature of the Oceanic VTX. The ultra-bright OLED screen is full-color … it presents as nicely as any watch. Critical data is color-coded for instant identification.

The OLED display departs from older LCD screens with black letters on a lighter screen. This new color option lacks the backlighting of LCDs, so it can be difficult to see in direct sunlight. You can shield the screen for viewing, but this two-handed operation somewhat defeats the convenience purpose.

You can quickly adjust the brightness intensity, but the battery power will also drain more rapidly. The screen is beautiful and works perfectly at night or in deeper water … be aware that some users have found this issue to be a drawback.

VTX Diving Computer

Interface & Menu System

The VTX excels at display functions. Used together with the tank transmitter, your full dive stats are instantly visible at the turn of your wrist. You can view and control your computer settings remotely too.

The menu system is intuitive and easy to learn and has an uncluttered, attractive push button design. Your current dive information is color-coded for quick visual identification, and it’s simple to switch between from statistics to compass mode.

Battery Power

The VTX is powered by 2 CR123A high-performance lithium batteries, rated between 30 and 40 hours of dive time. The device has many functions that add up to significant power drain, especially at higher brightness settings. Take note that the batteries included may have undergone testing, so be prepared with an extra set when first starting out.

Your usage time will depend upon everything from ambient conditions to the age of the cells, though it is most profoundly affected by the brightness setting. The batteries are easily changed, however, so you can keep a spare for switching out anytime. The VTX has data retention capacity, so your settings and calculations are preserved during changes.

Bluetooth Integration

The Oceanic VTX was the first dive computer to integrate with the Bluetooth 4.0 system fully. The device easily syncs with your digital applications, operating with the DiverLog for iOS App or eDiverlog software for wireless transfer. You can update and store your dive details to your smartphone or tablet and retain your records indefinitely. 

VTX Bluetooth Dongle

Reliability & Warranty

Dive computers are generally reliable, and the VTX is no exception. You can count on the unit for accurate reporting and safety alerts. The VTX is well-engineered to deliver functions you can rely on.

In 2015, Oceanic identified a defect that could cause flooding in the computer housing. No incidents or injuries were reported, but the company announced a recall: the housing was repaired for new issues that began with serial number 5000. (https://www.oceanicworldwide.com/us/news/cat/notices/post/vtx-quality-alert/)

Though negative reviews have been posted about the display readability and limited battery life, it is difficult to isolate a verified claim of failure. The company’s vigilance and follow-through during the recall process provides users with additional assurance. The VTX has a 2-year warranty, so check your vendor’s guarantee and maintain the unit as directed.

Attractive Design

The attractive look of the VTX represents the newest phase of dive computer design: lightweight integration on a personal scale. Its polished chrome frame holds a sleek and clean modern screen in full color.

Unlike more awkward strap-on wrist computers, Oceanic has crafted the VTX as a wearable device with a slim profile. Despite its full set of tools, this is one of the few dive computers that can double as a watch … and get compliments.

Oceanic VTX OLED Scuba Computer Only

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Special Functions

Oceanic is a top name in dive equipment and this premier personal dive computer benefits from quality engineering and design experience. The VTX is loaded with features to make your dive experience better, safer and less complicated. Here are some of its extras:

  • Logging ability with up to 24-dive storage capacity. You can add and view your location and other notes about your dive … and do it from anywhere.
  • Built-in 3-axis digital compass with tilt compensation. The function turns on with a simple switch.
  • Wireless firmware connectivity for feature and performance updates. The unit automatically maintains the latest version.
  • Automatic Altitude Compensation for altitudes between 2000 ft and 14,000 ft. The VTX provides automatic adjustments to show no-decompression times and depths. You can recalibrate the display for either freshwater or seawater.
VTX Product Box

Social Proof

The VTX has many positive user reviews online, with many 5-star reviews and recommendations.

Sometimes the most helpful reviews have honest critiques. Most issues that are mentioned when  you research this model are that the screen is hard to read in bright daylight. OLED displays unfortunately are hard to read in sunlight. Yet, underwater they show all the brilliance of that technology and allow you to read everything clearly.

Alternatives

Shearwater Perdix

Shearwater is a respected scuba brand, and their Perdix model is specifically targeted to technical divers. The flat unit has a compelling design and includes many of the features found in Oceanic’s VTX.

Shearwater Research Perdix AI - w/ Transmitter

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The main difference is that the VTX meets the needs of technical divers, but also appeals to recreational users. Consumers often make their technical gear a part of their lifestyle, and the sleek design and colorful screen are fashionable statements too. Also, the VTX is a mature product that is very competitively priced.

Shearwater Perdix

  • Best for advanced divers
  • Long battery life

Oceanic VTX

  • Attractive modern design

Suunto EON Steel

The Suunto EON is another attractive wrist-watch design with a slim profile and menu controls. It has a higher battery life than the Oceanic model, and the batteries are rechargeable for economy.

Suunto Eon Steel With Transmitter

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The big difference between the EON and VTX dive computers is cost. Air integration is standard on the VTX, but the pricier EON requires an add-on purchase for this functionality.

Suunto EON

  • Rechargeable battery
  • High-capacity Onboard Dive Log
  • Air integration requires additional purchase

Oceanic VTX

  • Built-in compass
  • Simple, intuitive operation
  • Economic value for almost the same performance

Check our in-depth review of the Suunto out for yourself at http://www.deepbluediving.org/suunto-eon-steel-dive-computer-review/.

ScubaPro G2

The ScubaPro is another similar dive computer and is also made by a reputable brand. The style is appealing and adds a few metrics to displayed dive information. The G2 is missing some features of the VTX, however.

Scubapro G2 Wrist Dive Computer W/ Transmitter and HRM

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The G2 has an attractive, crisp and readable display with well-thought-out menus. It offers air integration too … at a higher cost.

The Oceanic VTX includes Bluetooth integration and connectivity options, along with dive logging and a built-in compass. The VTX is less expensive than the ScubaPro, so if your pocketbook is not a factor, the decision between these dive computers may come down to your design preference.

ScubaPro

  • Wireless air integration
  • Rechargeable batteries

Oceanic VTX


  • Bluetooth and other connectivity options
  • Dive logging capacity

Conclusion

Modern diving technology seeks to solve the problem of complicated calculations and equipment overload while introducing new functions like dive logging and automatic syncing.

Oceanic VTX OLED Complete Scuba Computer with Transmitter

The Oceanic VTX provides both enhancements, offering a technological precision tool in a great-looking functional design. Air integration eliminates hoses and flopping gauges, giving you the ability to monitor your dive easily. Add in logging and connectivity enhancements, electronic compass and simple menu display, and you have a tool that looks as modern as the technology inside.