Andy Del

I think this does indicate over-kill. Gas laws, diving practices and also CCRs are constant and/or similar enough that one dose of jumping through the hoops should suffice for the thinking diver with regards to mixed gas training.

The major differences are going the 'niggle' points in individual rebreathers. the most obvious is clockwise / counterclockwise loops. Not being fully assimilated on a new unit's differences here has cost at least one diver his life. Ditto for unit setups and checking.

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