A flying saucer (also referred to as a flying disc) is a term for a supposed type of described flying craft with a disc or saucer-shaped body, commonly used generically to refer to any anomalous flying object. The term was coined in 1947 but was officially supplanted by the United States Air Force in 1952 with the broader term unidentified flying objects or UFO's. Early reported sightings of unknown "flying saucers" usually described them as silver or metallic, sometimes reported as covered with navigation lights or surrounded with a glowing light, hovering or moving rapidly, either alone or in tight formations with other similar craft, and exhibiting high maneuverability.