oldoberon
would that be the angle in 2D or 3D. ie bearing or bearing and elevation,and what about all these weird underwater effects we are told about
Normally, it would be the horizontal angle or 2D. The horizontal angle would not be affected too much unless you were tracking a reflection in which case, the angle would be to the reflection point. You could get a 3D solution by having more transducers vertically separated. I would guess the 3D would be affected more by the underwater effects but would still be useful.
The horizontal angle would the get pinger location down to a few meters.