Maybe I'm too cautious but anything other than a tiddler gets 2 torps,but score a dud and a miss and it's surface for gunnery practice (weather permitting) usually to slow the target down or stop him and a torp to finish him off.
In a large convoy I might just aim to slow the targets down with 1 torp apiece right below the stack in the hope they'll fall behind and be easy pickings,though any juicy targets will get 2 to try and take them out.
Dontcha just love it ?
You can setup the perfect shot,all the calculations have been made,position's good,he's right in the scope,LOS.....
Oooooh the waiting,and then....clunk
,and while your torp sinks to the seabed you throw the keyboard at the cat,hoof the 'puter out the window,yell at the neighbour's kids that no,they can't get their ball back,but you'll be back....we always come back.
Gotta love this game
Kremmen