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I was speaking to a new friend of mine at my unit; apparently he used to be
on a navy eod dive team. As we go to talking, we discussed the Mark 16
rebreather unit that he had used. Apparently it is heliox based, and is
(according to the manual) capable of 300 feet for 300 minutes. Apparently
the limiting factor is the scrubber (I forgot exactly what he called it).
Apparently the mask has a red/green LED indicator that tells if the mixture
becomes hypoxic/hyperoxic, at which time you must manually change the
mixture. He also mentioned that some work at been done where the scrubber
had been enlarged which increased the dive time. He was fairly vague about
this, as he hadnt actually dived with it like this. Anyone else dove this
system before? Any more information, or is it classified, and I'm actually
spilling beans??

PPS, he did admit that there is NO bailout system, and he has never had to
do any deco dives on it (as far as the navy was concerned; apparently it
takes quite a bit of rank to authorize this..)

Jason Richards
NSS/CDS 41539
rchrds@ho*.co*.ed*

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