[Torvald Von Mansee]

I just figured out how to do missions w/the chopper. Sometimes, I will know PRECISELY where an enemy sub is, and I'm pointing in the right direction, and I launch a torpedo towards said sub..aaaaand the damn thing goes off at a 90 degree angle AWAY from the target or even 180. The enemy target hasn't launched any countermeasures at this time, and even if they did, the countermeasures wouldn't be in the direction the torp is going, anyway!!! This is terribly frustrating. Can anyone explain why torps behave this way?