Have been playing nearly every day since my initial post and want to add a couple issues for posterity.

My basic egress plan was flawed. My idea was that I was going to make the escorts find me first before I did anything. I thought maybe they wouldn't even be able to locate me and have to give up without my doing anything. While this may or may not have worked in reality, in SH4 it ensures detection. Have read a couple posts on the subject that claim, correctly, that an escort in proximity to my broadside WILL ping me. This runs more than a little contrary to reality but that is an argument for another time. Because the escorts will loop around continuously in the area the torps came from, they will eventually run onto your broadside, ping you and commence the depth charging.

It is imperative that the sub move out of the firing area asap. Don't wait around to see the boom. Get down and get going. While in egress, do your best to keep your bow or stern pointed at the closest destroyer(s). Run silently at the best speed that is safe for the listening conditions. Once clear of their search patterns, drop it to just under 50rpms and creep out the side door.

Have been having excellent success with this basic egress plan.

Thanks again to everyone for your expertise. I think I'm on track.:ping: