Survival Systems USA teaches civilians how to walk (or swim) away from aircraft crashes in water.
Air & Space writer James Chiles spent a day in training:
Survival Systems USA offers several such courses at its headquarters building alongside the airport at Groton, Connecticut. The one-day course teaches the basics of escape from a flooded aircraft cabin on "breath-hold," meaning without the help of emergency breathing gear. It's chiefly for civilians who fly over water in small aircraft, such as business jets, floatplanes, air taxis, or air-ambulance helicopters.
I'm taking the two-day course, called Dunker Training. It's designed for crews who train to military or law-enforcement standards. It adds two main topics to the short course: how to survive once out of the aircraft, and how to use a mini-SCUBA set that fits in a vest. The pressurized breathing gear poses some risk of injury or death—even to students in class—but offers valuable time when escape proves difficult. And underwater escape is a field where small margins, plus a powerful will to see one's family again, make all the difference.
"How to Survive A Helicopter Crash" (Air & Space)
