[Hitman]

Bad weather should also be an ally, as radar will theoretically work worser with higher waves. But keeping a small silhouette is in any case key to get undetected. If you have FATs and LUTs you can try shots at 3000-4000 metres range with many chances of hitting something, and it can still work even in mid to late war (Not all escorts have always the most up to date equipment). All you need is a reasonable distance estimation to the convoy and then programming correctly the torpedo to zig-zag. The main problem is evading, because once you give away your position all the hell breaks loose. I would recommend shooting, then turning the boat around with full rudder in the opposite direction the convoy is moving (If convoy is moving to the right of your bow, hit left full rudder) and heading away at flank speed in diagonal, so their speed is added to yours but you keep showing only the narrowest silhouette (Your stern). When you hear the impacts, crash dive, rig for silent running or even full stop. And pray they have not pinpointed you before submerging.