It began as nothing more than a routine training flight. At 2:10 p.m. on December 5, 1945, five TBM Avenger torpedo bombers took off from a Naval Air Station in Ft. Lauderdale, Florida. The planes—collectively known as “Flight 19”—were scheduled to tackle a three-hour exercise known as “Navigation Problem Number One.” Their triangular flight plan called for them to head east from the Florida coast and conduct bombing runs at a place called Hens and Chickens Shoals. They would then turn north and proceed over Grand Bahama Island before changing course a third time and flying southwest back to base.

Shortly after the patrol turned north for the second leg of its journey, something very strange happened. For reasons that are still unclear, Taylor became convinced that his Avenger’s compass was malfunctioning and that his planes had been flying in the wrong direction. The troubles only mounted after a front blew in and brought rain, gusting winds and heavy cloud cover. Flight 19 became hopelessly disoriented. “I don’t know where we are,” one of the pilots said over the radio. “We must have got lost after that last turn.”

The flight leader became convinced they were over the Gulf of Mexico rather than the Atlantic and ordered the flight to fly east, despite protests.

They were never seen again.

Even stranger, a PBM Mariner with 13 crewman took off that same evening to search for Flight 19 and disappeared 20 minutes into the flight and was never seen again. What happened?