Sound very hazardous trying to get out from one underwater with all those rigging wires.
The standard tactic for *any* underwater egress is always the same.
- Initially leave your seatbelt fastened.
- Forget what is up or down, just orient yourself against the aircraft.
- Visualize your way out
- Remove any stuff that needs to be removed. Like windows and such. In helicopter egress training we were actually required to do a 10-second mock winding down of the imaginary window. Or something like that.
- With one hand, grab something sturdy in the direction of your exit. When doing inverted helicopter egress training, this was simply the window sill, but in a flexwing you might need to grab the triangle or something like that.
- Only now, with the other hand, unbuckle your seatbelt.
- With the first hand, pull yourself towards your exit point. If your exit point is not very near, you might need to pull yourself hand over hand towards it. It is very important to visualize this beforehand so you can get there by feel. Ignore any up/down sensation. As long as you are in the aircraft the only thing important is to orient yourself in respect to the aircraft.
You should now be clear of the aircraft. Orient yourself and swim up. Or simply deploy the life jacket.