mCCR and zero viz exit

Mike

For most of us doing normal depth dives - yes. But I sure as hell wouldn't be betting on it at 200m when there is only ~5% O2 in the loop.

I don't think I'm good enough to pick loop volume that closely - perhaps that's why I don't do 200m dives.

Mike

__________________
Open ....... Closed
Mind ........ Loop

Drmike

Hi,

at -200m depth you dont need high ppo2 (no advantage to deco) you can therefore allow your ppo2 to drop a load and it will have little to no effect on deco (at these depths) so you can get away with just breathing your loop down and not add O2, only dil, untill you get to shallower depths where elevated ppo2 is needed.

Running min loop will interfere to a degree with full ventilation - something that Id want to avoid at extreme depth

basically I dont plan on runing min loop at -200m depths with a reasonable fo2 dil, with the lack of benefit of maintaining high ppo2 at depth, and with the shortness of time spent at depth- theres just no need

__________________
Get a girlfriend you sad twat - a Rebreather is an unfaithful mistress - dont blind yourself to her faults just because she goes down on you

Meng_Tze

For the record. You can 100% see the individual LEDS shine on a Shearwater HUD in less than 3" vis. I was in a complete siltout today with less than 3" vis. I know it was less than 3" since I could not see the HUD housing itself nor the mount, but did see all three LED's light. I kept my PO2 at level by means of the HUD alone.

__________________
Homo Bonae Voluntatis