Saskatoon, not sure if QF actually do it, but...
I recall after the loss of life in the Sydney to Hobart yacht race a few years ago, this time around at least 50% of each yacht's crew were required to undergo 'swimming survival" training. Apparently QF's pool at Mascot was used.
Not only were all the crew dumped in wearing full gear, but the water was churned up, the lights were flickered on and off at random intervals, and apparently they had divers under the water simulating what it's like to have a drowing oerson trying to use you as a life jacket!
Reckon it'd be great if airlines did the same - bit more realistic!!
Sky