[mookiemookie]

Originally Posted by Sailor Steve

No, if the rotating device is pointed at 90 degrees he will not hear a ship at 270 degrees. For this reason he is always turning the device in different directions listening. Remember the scene where Hinrich is listening to a destroyer and suddenly turns the wheel frantically back and forth. He heard a second one and was trying to follow both of them.

Hmm...

This seems to imply that you could hear sounds even without the hydrophone trained directly on the source.

I could be wrong. Just going off of what I read. Maybe I misunderstood it.