[Threadfin]

I use salvos, especially against fast moving ships, since by the time the first torpedo hits the angle will have worsened considerably for any follow up shots.

Mostly I use manual spreads, that is, I fire the fish individually in a spread (not TDC directed fan), which allows me to precisely target and spread the fish. Using the fan setting on the TDC is a lot of guess work. Firing at bows, sterns, masts, stacks etc, is more precise IMO.

Only against the fast moving ships will I use a TDC-set spread salvo.

In the conning tower are switches to open/close tubes, and when firing the 'manual spreads' I'll open all the doors so I don't have to wait for the door to open on each new shot.

I use manual targeting and TDC.