How do they know?

[nfitzsimmons]

Originally Posted by Lzs von swe

If you hit a ship in the outer left line of the convoy the escorts will most likely start searching in that direction, 1000-2000m out. If you are still there when they get there, you are in trouble. Lesson learned, do not stay in your firing position, scope down, dive and move out of the way

The modern technical term for this procedure is to "clear datum."