Wait so you can run out of food and die?? I only ask because you said they give you food ??
And the ammo part re assures me because I had wasted about 6 torps on a 10k ton ship (she had beat me to the punch so I had to chase her at 14 knots while she was going 10 and right when I got in what I thought was enough range, Id fire, 4 torps never made it :P) but it was an interesting kill none the less, the other ship Id sunk I thought it was night but it wasnt so I was surfaced and she saw me and I tried with about 4 torps and nada
so I just chased her with the deck gun for about 100km and a few hours. that was interesting. She would not go down!! But 6 days in patrol and now I have 14k tons in my 2nd
that makes a total of around 34,000GRT for my career not bad for 2 or so months