Just got back from a harrowing mid-'42 IXC patrol to New York. BdU, in its infinite wisdom, sent me to CA28, which is all shallows just east of New York. I managed to sneak in to the square and set myself up guarding the entrance to the bay leading to the harbour, when a Large Cargo crossed my bow. With the sneering command of "Be more aggresive" ringing in my ears I dared not fail to shoot, and sink she did.
What followed was a 15 hour escape in 12-15m deep water with DD's and torpedo boats going ape**** around me. Going silent I managed to evade most of them for quite a while until a Clemson stumbled upon me, and immediately started pinging me. This led to a second DD approaching, and my big, hulking boat, barely concelead beneath the waves seemed doomed. I had six torps remaining tough, and through desperate manouvering and very poor marksmanship I finally nailed the Clemson with the last of the six.
But the other DD was still on me, doing several DC runs. The trick that worked best for me, apart from maintaining a small angle to him, running fast when he was pinging and constantly turning away from his charges was a liberal deployment of BOLDs. Firing off two BOLDs I went flank, turned so that the BOLD formed a barrier between me and the DD and set off at oblique angles in respect to my initial course. After doing this four or five times the DD ended up attacking my latest BOLD drop for several minutes - allowing me to flank off to reach the critical separation I needed to loose him.
So all in all, 1 DD sunk, 1 evaded, survived 3-4 DC runs directly over my position with 100% integrity remaining - still can't beleive my luck
(GWX 1.03 100% realism btw)