Snapping Shrimp (what?) and Sensors

> >Well I don't mind the extra "stuff" sensors would allow, but some

Snapping shrimp. DON'T TALK TO ME ABOUT SNAPPING SHRIMP! These little
b.... -
um -  creatures produce so much noise at about 120 Khz that they bollix
up the best frequencies for minehunting sonars. They are a Royal Pain.
Submarines use patches of em to hide in too, the lower harmonics are quite
strong.

Yes,they are really, really chatty. Much more so than, say, a gas turbine
engine. Just on different frequencies.