Tips using Decoys

[Pevs86]

Originally Posted by ridgewayranger

Hi There,
Decoys used by U Boats did not make a noise. They were known to us as SBDs or submarine bubble decoys. A chemical reacted with seawater to produce a large cloud of tiny bubbles wheich remained static for a while.
It returned echos to the sonar which sometimes deceived the operators but a good one could usually distinguish it by the woolly sound of the echo and the fact that it was stationary.
Incidently, escorts used to tow a noisemaker called Foxer to decoy the acoustic torpedo developed by the Germans.
RR.

heh cool, nice bit of info ty