Answer: A small, expendable device used in underwater acoustics to detect and sonar systems
Notes: The US approved a $52.8 million deal to sell Anti-Submarine Warfare Sonobuoys to India. These Sonobuoys will be used with the Indian Navy’s Romeo helicopters. Sonobuoys are small devices that detect underwater sounds, mainly to track submarines. They are crucial for anti-submarine warfare, helping track submarines in oceans and coastal areas. They assist in precision attacks using air-launched torpedoes. Sonobuoys were first used in World War II to detect German U-boats. They are deployed from aircraft, ships, or submarines, sinking to a set depth to listen for signals.
