On 10 March 1946, an Australian National Airways DC-3 airliner crashed into the sea off Seven Mile Beach, Tasmania, shortly after taking off from Cambridge aerodrome en route to Essendon. All 21 passengers and four crew were killed.

The Coroner, Mr G Sorrell found that approximately two minutes after take-off from Cambridge, at a height of approximately 400 feet, the aircraft was seen to turn slightly and crash downwards into the waters of Frederick Henry Bay near Seven Mile Beach. The force of the impact shattered the plane, and all occupants suffered severe injuries leading to their deaths.