I've had extremely good results using magnetics against tankers.
However, it always depends on the situation you're facing.
A bad AoB (eg. far from 90) start thinking seriously about using a mag. rather than an impact pistol.
Like always, is up to the Kaleun's to judge at the end.
Mags. were meant to do a lot more damage than impact eels, since they would allegedly break the ship in two, but, a lot of factors need to come into play for it to happen.
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