Elevation is actually the amount of 'detection' added to detecting you. It should be called Alert Level rise. :hmm:
It is different for all 7 pairs of passive and active enemy sonars. It values change quite a bit.
'Elevation' is being used in the sense of 'Alert level Increase to Detect You' upon a detection event. :hmm:
I think.
I never noticed any change to angle of detection or depth mesing around with it. Of course I could be wrong. Not 100% sure myself.
Type 147A Sword active sonar has 90 (horizontal) to 155 (45 degree angle below water). So you can be correct.
The hydrophone and all is limited to -10m so if 80 degrees is above water, it wil not matter. I am not sure if it even works in the game as stated.
The old active sonar were the 'searchlight beams' limited to about a 10 degree arc. 90 to 100. That is horizontal to 10 dip angle below water line.
Test it and discover what it the truth?