Kevrumbo
Banned
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I'll let you know if that scenario ever happens. More likely to inadvertently snag/cut one of my tank supply hoses inside the tight forward confines of the I-169 Japanese Submarine Wreck at 36m here in Truk Lagoon (where a Backmount Doubles Dive Guide would be delayed & held up at a few aft restrictions before getting to me).Same way as in every sidemount config that is not explicitly cave related.
But what about overestimated lifetime of hoses on your back in that scenario?
I would shut down that cylinder, and if the other cylinder catastrophically "OPV's" open, I would then try to feather/modulate the tank valves of either cylinder as a last resort while making my way back aft to the Dive Guide, or if I'm stuck in a hatch restriction, hopefully waiting 'til the Dive Guide makes his way to me.
And in addition, what about a total siltout with a Primary & Secondary Light Failure to go along with all that? And quadruple failures all happening at the same time???