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Rebreather
Diving |
 Rebreather
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What is rebreather diving?
A rebreather is a piece of scuba equipment that rests on the
divers back in replace of traditional scuba cylinders and basically
recycles the breathing mixture the diver descends into the water
with. The rebreather captures and re circulates the divers exhaled
breath removes unwanted off products such as carbon dioxide
by a means of a chemical system know as a scrubber and adds
oxygen to replenish what has been metabolized by the diver.
The only gas a diver consumes underwater is oxygen and with
this in mind rebreathers can be an extremely efficient tool
if and when used within its correct limitations. On a typical
dive using a closed circuit rebreather such as the one the diver
is using in the picture above the diver will not exhaust any
of his gas supply into the water other than venting on ascent
thus they will be silent to other creatures in the ocean.
What are the advantages ??
With a rebreather you can make one very long dive or several
short dives using cylinders that are dramatically smaller in
size than conventional scuba cylinders hired from a scuba shop.
Traditionally with open circuit scuba (a cylinder and a regulator)
every breath you take is exhaled into the water from the exhaust
of your regulator, thinking about it this is a waste as much
of the gas you exhale is still usable. We have mentioned that
its only the oxygen that your body consumes and on each breathe
you take this is typically around 4% therefore 16/17% is exhausted
away. The rebreather uses this gas by recycling it therefore
as an example technical divers descending down to a deep wreck
once used huge twin 20litre cylinders and more, today a rebreather
diver can make the same dive using just a pair of 2 litre cylinders
for a longer period that open circuit.
Above left:
Rebreather divers on the deep wreck project Egypt 2001
Above centre: Rebreathers on a typical UK dive boat.
Above Right: Rebreathers being used by BBC television
cameraman.
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cont:-
The ability to move closer to creatures that live in water is
also dramatically enhanced which is why cameramen such as those
working on projects such as the BBC's Blue Planet use closed
circuit rebreathers.
Military divers also use close circuit rebreathers as no bubbles
appear on the surface tracing their movements when working on
special projects. The advantages of rebreather diving are endless
and today a typical dive boat along the English Channel has
more rebreathers aboard than ever before.
Deep Blue Diving have trained many of the worlds leading rebreather
divers for more information please give us a call or read about
our rebreather courses by clicking
here >>
Were happy to give you as much guidance as we can and are here
to help as much as we can and guarantee you will know everything
there is to know once you have been on a rebreather course with
deep blue.
To contact us click here and ask us
your questions.
To learn more about rebreathers and rebreather diving before
your course check out our information page with downloads from
external sources. Rebreather
information page click here
Richard Stevenson |
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