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A.Appleyard said:

> You can keep on adding extra bits for unusual circumstances making the set
> ever more expensive and heavier per hour duration and more unhydrodynamic in
> swimming and in rolling over etc. Meanwhile the standard UK naval frogmen's
> rebreathers and the old Siebe Gorman Salvus are beautifully light and
> streamlined and agile. An incredible amount of work goes into streamlining
> boats and submarines both naval and pleasure; how often is diving gear tested
> for streamlining and minimum drag?

Old O2 rebreather (and new ones) where of course very compact, buy they 
didn't have a 120m+ depth capability with full redundancy and the ability
to optimised deco by switching gas mix. What do you what, something with all
the functionality of the Cis-Lunar but small enough to fit into your pocket?
You will have to wait until Marine Boy divulges the secret formula of 
oxygum before that happens.
Yes a Cis-Lunar is not as compact as an O2 rebreather, but the OC alternative
that gives you similar capability is a lot more bulky and a great deal
heavier.
Some people will never be satisfied!

Ian Horsfall
imh@li*.ac*.uk*

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