|The system to raise and lower the sonar dome|
|Sonarman Trade Badge|
A passive sonobuoy. Basically a floating transmitter and a hydrophone attached to a long cable
There was an other sonobouy system that I don’t recall ever seeing in operation. It was an active sonar transducer housed within a sonobouy. That system was called “Julie” named after a stripper familiar to the development team, because she “made passive Bouys go active.” Honestly I haven’t made this stuff up.