I think taking a dunk in a tank before setting out over open water is a great idea. Can't imagine it would cost that much...?
Lets face it if you lose an R44 engine over water, you are going to get wet, so some preparation as to what to expect and how to escape can't be a bad thing.
Not sure if there is a tank with specific types? I would imagine most of them would be based around large turbines?
If its the english channel then there is plenty of sea traffic so chances are with a good radio call and some quick thinking you could get picked up pretty quick. However that won't prepare you for escaping a cockpit underwater.
Maybe it should be mandatory?
