So here's my concern - I'm an average swimmer, can do all the basic strokes, tread water, drownproof, etc. However, I've can't imagine what it's like to do all this in full combat or flight gear. Then there's the mile swim in a flight suit! - is that done in a pool or the ocean? Practice makes perfect, and I'm sure I'll get plenty of that, but any insight/advice you guys can provide would be greatly appreciated...Thanks!