Has anyone else noticed Allied ships that depth charge themselves in shallow water? I ran into an ASW trawler inside Dover and it blew itself up (and about 200ft into the air!). I also got caught by four DDs inside Scapa after sinking the Illustrious. Three of them blew their own depth charge crews off the boat (which meant they couldn't depth charge me) and the fourth sunk itself doing the same thing. The three without charges then ran themselves ashore on an island allowing me to pick two of them off while the third holed itself on the island and sank.
I was happy to escape, but didn't think that DD crews were this suicidal. If it keeps happening, I'll risk the mines and nets and you'll find me building up tonnage inside Allied ports every mission!