Speed and Hydrophones

[onelifecrisis]

From sensors.cfg:

;Hydrophone
Hydrophone range factor=1 ;[>=0]
Hydrophone fog factor=0 ;[>=0]
Hydrophone light factor=0 ;[>=0]
Hydrophone waves factor=0.2 ;[>=0]
Hydrophone speed factor=0.5 ;[>=0]
Hydrophone enemy speed=0 ;[>=0]
Hydrophone aspect=0 ;[>=0]
Hydrophone noise factor=0.4 ;[>=0]
Hydrophone sensor height factor=0 ;[>=0]
Hydrophone already tracking modifier=20 ;[detection probability modifier]
Hydrophone decay time=150 ;[>0] already tracking bonus decay, in seconds
Hydrophone uses crew efficiency=true ;[true or false]

I reckon "speed factor" might be the speed of the enemy ship (my first guess was "enemy speed" for enemy speed but that is set to zero suggesting that it does nothing :hmm so "noise factor" presumably is your own engine noise?