US Navy demonstrated floating radio station for detecting enemy submarines.
Unissued / unused material.
United States of America (USA).
Item about Sonobuoy is a complete operating floating radio station which detects and transmits underwater sounds.
Various shots floating radio station, including shots of underwater microphone. Model of submarine. Various shots pilot in patrolling plane listening to signals from floating radio station (Sonobuoy), it has detected an enemy submarine. The pilot directs a warship to area. Various shots warship approaching area, they fire depths charges into sea to destroy enemy submarine. Animated sequence showing how Sonobuoy is dropped into sea using parachute. Various shots aeroplane crew dropping Sonobuoy out of plane using parachute. More shots radio operator listening to noises from Sonobuoy and warships going to area. Split screen showing pilot speaking to Naval officer on warship. More shots warship attacking with depth charges.
Date on original record is 24/10/1946.