March 6 The U.S.S. Cyclops was a huge collier used to carry coal and other cargo to facilitate U.S. Navy operations during World War I. En route from Barbados to Virginia, the ship and its crew of 306 disappeared without a trace.

December 5 The pilots of Flight 19 — five U.S. Navy bombers on a training exercise — apparently became disoriented and then disappeared. Search-and-rescue (SAR) operations were unsuccessful, and one of the SAR vessels, a Mariner aircraft, also vanished. In all, 27 naval personnel were lost. (Read our extended feature about Flight 19)

December 28 NC16002, a Douglas DC-3 airliner carrying 31 passengers and crew, disappeared after last being seen on approach to Miami.

October 30 On Halloween eve, Flight 441, a U.S. Navy R7V-1 (the military version of a Lockheed Super Constellation) crewed by 42 sailors, disappeared between Patuxent River NAS and Lajes, Azores.

June 5 While flying from Miami to Grand Turks, Turks and Caicos Islands, a C-119 Flying Boxcar and its crew of 10 simply vanished.

January 30 The Carroll Deering, a five-masted cargo schooner travelling from Barbados to Virginia, was found adrift without a sign of its crew, though two cats were still on board. The Carroll Deering is known colloquially as "the Diamond Shoals Ghost Ship."

January 30 A British commercial airliner, the Star Tiger, a four-engined Tudor IV with 31 people on board, vanished on a flight from to Bermuda from the Azores.

January 17 Just less than a year after the Star Tiger's disappearance, another Tudor IV, the Star Ariel, vanished en route to Kingston, Jamaica, with 19 people on board.

February 3 The S.S. Marine Sulphur Queen vanished en route from Beaumont, Texas, to Norfolk, Va., with a crew of 39, shortly after it radioed its position near Key West, Fla. Three days after its disappearance, a lifeboat that belonged to the tanker was found by Coast Guard searchers. No bodies or wreckage were ever recovered.

December 22 A cabin cruiser with the ironic name of Witchcraft disappeared off the Miami coast.