Cavitation

[MaHuJa]

Originally Posted by Wim Libaers

Magnetohydrodynamic? It works. However, it requires lots of power, may attract magnetic stuff to the sub, and is not completely silent (big generators for the power, and with high currents electrolysis may become a problem).

So, you'd get one hell of a big MAD signature (probably on the order of several miles?) and a giant bubble trail...

How about smaller scale? UUV, torpedo, etc? I guess it would pretty much ruin any chance of magnetic detonation...