I learned a new lesson

[U777]

always monitor warships once in awhile with the periscope, it was the dead of night and the watch team spotted warship smoke in the distance so we dived to periscope depth. I confirmed it with the scope and since it was a ways off and the waters were a bit shallow I didn't dive deeper. It was a small patrol craft and with no warning it nailed us dead on target and we were dead after the 2-3rd depth charge. Its amazing that it knew exactly where we were with no visual or sonar cue and yes we were rigged for silent running at one knot.