That was not a torpedo, that was a "bubble charge" The most effective way of taking down any vessel (if you can get a swimmmer in to place it... see SEALs) . Place a Limpet mine or a 80lb satchel charge under the hull and this video is what you get. The vessel lifts out of the water and collapses on its own weight.

bubble charge ahhahaha. good one

I know what munition you are talking about...but this is not that. It is a Torpedo.
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E-4.. DAMNIT!!! YOU SANK MY BATTLE SHIP

wow cool.......

definatly wow

those things seem like sitting ducks