i like it.
sort of an underwater cluster bomb of low yield explosives intended to destroy the acoustic properties of the area.
i think such a device would have to be made into the form of a slow moving torpedo which creates bubbles of cavitation.
the torpedoes could be fired into several directions - each one emitting sub like sound effects and large bubbles.
this would force the destroyers to attack each individual sub before possibly finding the real sub.
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