What is a good method to plot a ships course using the gramophone?

[kylania]

If you're playing with map updates on the ships position will be at the end of the sound contact line. So you can simply plot it's course and location from that.

Otherwise... well, enjoy this:

Plotting a contact-course only using hydrophones!

That'll get you a good plot using only the hydrophones and a spectacular amount of drawing and trig. :p