Thanks for the info! The Navy offered me a commission to go with submarine duty, but I wanted naval aviation. For some reason, flying in a metal tube at high altitude is easier to deal with than cruising in a metal tube under hundreds of feet of water.
I'm not sure if the sport free divers wear air bladders or something special to make them rise faster than normal to the surface, but I believe they do, at least when they are first training.
Everyone wants to go Naval Aviation. At least submariners who get picked up for officer programs. Go figure.
Good luck. You made a good choice (and I hope you get accepted as a Naval aviator). Being a junior officer on a submarine is one of the most loathed and painful officer billets in the Navy (but the pay is good). I wasn't an officer, but on submarines enlisted personnel work very closely with the officers (especially in the nuclear areas--my specialty). The Navy constantly has to sell the submarine junior officer position because it is so disliked. It has the way that it is due to the stress that submarine department heads and higher eventually experience, but very few JOs are happy with their choice during their first few years.
I just completed a two day training at the Aviation Survival Training Command to qualify for flying in metal tubes. Having to swim 15 yards underwater with a flight suit, steel toed work boots and a helmet is a real challenge. The follow up was being pushed to the bottom and hooked to a seat belt (again in full flight gear). You have to pull yourself 15 feet down a bar and operate 5 different styles of latch to "exit" through the hatch under water. The first time you do it with your eyes open. The second time with opaque goggles to simulate a night ditch. Having to do complex operations when you are pressed to manage the air from that last breath takes some extra mental focus.
The hypobaric chamber with smoke mask is an experience too. Frankly, the "parachute" training was pretty glossed over. I hope I never need it.