Airman Dustin Campbell performs a leakage test on a raft in the 437th Operations Support Squadron float section on Joint Base Charleston, S.C., April 7, 2010. The rafts are used during aircrew water survival training and leak tests ensure their serviceability. Airman Campbell is an aircrew flight equipment apprentice with the 437 OSS. (U.S. Air Force photo/Senior Airman Jennifer Flores)

Airman Dustin Campbell performs a leakage test on a raft in the 437th Operations Support Squadron float section on Joint Base Charleston, S.C., April 7, 2010. The rafts are used during aircrew water survival training and leak tests ensure their serviceability. Airman Campbell is an aircrew flight equipment apprentice with the 437 OSS. (U.S. Air Force photo/Senior Airman Jennifer Flores)

Airmen with the 437th Operations Support Squadron float section pack emergency water packets into ML-4 kits April, 7, 2010, on Joint Base Charleston, S.C. The ML-4 kits are attached to parachutes for aircrew members in the event they egress the aircraft. The kit contains a life raft and required survival equipment for over-land or over-water survival situations. (U.S. Air Force photo/Senior Airman Jennifer Flores)