Flight 19 was the designation of five TBM Avenger torpedo bombers that disappeared on December 5, 1945 during a United States Navy overwater navigation training flight from Naval Air Station Fort Lauderdale, Florida. All 14 airmen on the flight were lost, as were all 13 crew members of a PBM Mariner flying boat assumed by professional investigators to have exploded in mid-air while searching for the flight. Navy investigators could not determine the cause for the loss of Flight 19 but said the aircraft may have become disoriented and ditched in rough seas after running out of fuel.