sonobuoy

[ son-uh-boo-e, -boi ]

noun

, Navigation.

1. a buoy that emits a radio signal on receiving an underwater signal from a vessel.

sonobuoy

/ ˈsəʊnəˌbɔɪ /

noun

1. a buoy equipped to detect underwater noises and transmit them by radio

Word History and Origins

Origin of sonobuoy¹

First recorded in 1940–45; sono- + buoy

Word History and Origins

Origin of sonobuoy¹

from sonic + buoy