[Instructor] Squadron Leader A Roberts and a student pilot, R Howarth, were flying a Tiger Moth near Lake McIlwaine [now Lake Chivero], in Zimbabwe (then Rhodesia), when the two witnesses saw a saucer-shaped silver object some 1¼ miles (two km) above them, and about six miles (nine km) away. Taking a closer look they saw that “it turned on its side and flew away at great speed”.
However, as they reached the edge of Lake [Chivero] they saw the object coming towards them, then maintain station some 2½ miles (four km) away. There were no portholes or external means of propulsion visible; they estimated the object to be approximately 40 feet (twelve metres) wide. The object disappeared at incredible speed.