Tube load out.. in front - 2 electric, 2 gas. In back - 1 electric.
Electrics used in daytime, steam ones used at night. If more than one target is available fire electric torps at furthest target first, and steam torps at closest one. Plan it so the targets are hit at the same time.
Always fire 2 torps per ship, and if it does not sink it's not going far and will fall behind a convoy. Bide my time and then sink it with gunfire.
Sometimes an escort or two will hang around for hours - I'd just sit under the ship waiting for them to buzz off.
