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>>>I would like to construct a fully closed circuit O2 rebreather.  I plan
to use a modified A.P.Valves bcd as a breathing bag.  I don't anticipate any
great difficultiesmodifying the bcd it looks almost as if it were designed
for this application, hosing and fittings are available from the factory and
it even comes with a manual gas injection system (.6liters 232bar). What I
do need is information on the design of scrubber stacks.  If anyone has any
information on how a scrubber could be fabricated it would be a great help.
>>>
>>>Using the unit for actual free swimming diving would be a bonus but I
forsee its application being mostly for surface O2 supply.  Most of my
diving here is done from small inflatables and lugging T cylinders of O2 is
not practical.  I cut a couple of tables as an example; do a  :20
prebreathing of O2 followed by 200' for :15 on air, then a surface interval
of :60 on air followed with :40 on O2, then another air dive to 160' for :20
you would see deco times of :26 and :25 respectively.  If on the other hand
you did no surface O2 you would increase you decos to :33 and :62.  I
realize that diving gas combinations would yield less deco but by simply
breathing O2 on the surface you decreased you decos substantially.
>>>
>>>The beauty is that there is no increase in u/w gear or diving complexity,
and only a minor increase in cns load.
>>>
>>>The other advantage is that should  a long dci victim transport time or
in water O2 recompression be required small boat may be able to handle the
gear requirements.  
>>>
>>>One last point, I have heard that the French navy has surface ambient
pressure O2 accelerated surface interval tables.  Has anyone seen these
tables, whats the sccop?
>>>
>>>
>>>
>>>
>>>
>>
>

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