[TorpX]

Originally Posted by Loudspeaker

Problem is, this is a time consuming method. Just as you are beginning to get a clue, what is going on up there, your target is already anchoring in Tokyo Bay. Not to mention the frustrations coming with the target simply altering its course and makes you feel like an idiot.

This is my thinking. The USN manuvering board manual had a problem of this nature where one was to calculate the course and speed of a ship from bearings only. It was not phrased as a submarine attack problem, but rather as a problem with a ship located from radio signals or the like, so it is possible.

In ordanary circumstances, it's hard to see any advantage to making an approach in this way. Submarines had periscopes and later radar, so a sonar only approach was unnecessary.