So during my bi-hourly hydrophone check I detected a merchant contact to my south.
I surfaced and moved in for intercept. After a while I was within visual contact and saw there was a convoy of 5 steamers, unescorted! Hurrah!
I moved ahead and got into position. Locked in details on the lead ships and waited. As they passed I launched my torpedoes. The far one missed since I misidentified the ship and it passed below it, but I nailed the close merchant. At this point though I have one rear torpedo left and no gun rounds. So, I just sit there and watch the convoy pass waiting for the stricken merchant to sink.
Just than one of my lookouts called "Escort sighted!" "That's odd," I think because there weren't any escorts near when I started to attack. I glance in the direction of the contact and FIVE destroyers are doing 34kts RIGHT at me!
I scream "ALAAARRRRRMMM!!!" and nothing happens.
Ah ha! So I scramble to the hatch and go down it, THEN scream "ALAAAARRRRMMM!!!" and we crash dive...