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A little trick we sometimes use when wishing to do multi deep dives off same fill is to go onto OC Oxygen during the 6m stop.
In this way when Im diving the Repulse (55m) for eg. I can do;
Dive 1 , 55m for 35mins - total time on scrubber up to 6m stop = 66mins
Then OC for 6m stop.
Dive 2, 55m for 35mins - total time on scrubber up to 50m level = 100mins
(Total scrubber usage for both dives = 150mins)
So in some cases like this, going to OC at 6m can give me say an extra 35mins of scrubber time that will enable me to do another deep dive off the same fill.
Going to surface supplied (or staged) OC at 6m also saves having to mess around with O2 flushes and reduces need to refill on-board O2 so often. |