A British South American Airways (BSAA) Avro 688 Tudor Mark IV passenger plane carrying 31 people disappeared during an overnight flight from Santa Maria Airport in the Azores to Kindley Field, Bermuda. The machine was making a transatlantic flight at an extremely low altitude of only about 610 m. The crew reported no problems.
The low-flying aircraft was observed on the night of the crash from the deck of a merchant ship. It veered off course and toward the east coast of the United States. Two days after the plane's disappearance, in an extensive search operation, the remains of the machine were spotted at sea, but they could not be clearly identified. It is believed that the reason plane crashed was the lack of fuel. Although the machine disappeared north of Bermuda, far outside the Bermuda Triangle, supporters of the mystery hypothesis attribute another case of mysterious disappearance to it.