Uh?

I thought that was a new feature of SH
3
AFAIK in SH2 you can't open the tube before firing the torpedo, you just fire it and that's all. Q key enables one of the slide out panel, I think:hmm:
P.S. your question must have gone unnoticed to me, otherwise would have replied sooner

excuse me because I'm lately much busy in the SH3 forums