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	"Kevin Klop" <kevin_klop@qu*.ap*.co*> wrote:

	[on rebreather failure...]
	Anyone have any thoughts on this? Sure, you can always have a
	pony bottle down with you, but from what I saw of CIS-Lunar,
	the unit is heavy enough without adding an additional pony
	bottle.

The CIS-Lunar, as I understand it, has its own redundancy built in.
All the photos I've seen of the recent models feature two 2nd stages
(if that's the correct terminlogy) and it is said to be able to fail back
to semi-closed, and then open circuit.

Self-sufficiency seems to still be the aim.  Some people carry a bailout
bottle (of the bottom mix) and stage decompression cylinders - this
is how the Blue Holes rebreather dives were done in the late 80s.

In a recent article on Blue Holes (in aquaCorps N7) Rob Palmer writes:

	"for long, remote exposures the old rules of redundancy
	 still apply.  Take two."

Time to start saving those pennies!

				Greg Ryan	gregr@cs*.su*.oz*.au*

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