Definitions for "Sonobuoy"
A device released from aircraft, which converted sound waves to an electromagnetic signal, received in aircraft to detect U-boats.
An airdropped buoy fitted with sensitive microphones and a radio, used to detect submarines running underwater.
a buoy with a sonar attached to it
a remote, floating reconnaissance sensor that can be launched far from the site of interest and can report back information to remote observers on land or on vessels
a cylindrical device, which was deployed (dropped) from a low-flying airplane
a device that lies in the water and captures ambient sounds in the ocean