I agree with, "SteamWake" - I simply don't believe there's enough AI in the standard campaign game(s) to enable escorts not already attached to the group to respond to distress calls. Further, as also mentioned by, "SteamWake," they ARE pretty friggin' clueless even if they're in the area! They may NOT retaliate at all but, even if they do, you're in more danger of being deafened by their ASDIC's pinging than from their ignorant depth charges attacks (yes - I'm aware that early in the war, the Allies navies had depth charges incapable of operating at depths U-Boats could attain, but I evade DD's and DE's routinely from periscope depth - while looking straight at 'em!)
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