Unfortunately, the problem with the sound of the hydrophone is because inside xxxxx.sim files > unit_ship > propulsion > eng_power= "if<1100~" hyd sounds dissapear.
for example:
Cimmaron Class Oiler, at 11 knots:
-my NOL_T03.sim-----------> max_force=240 | eng_power=30400 | eng_rpm=46 | -------->>> R.P.M. listening by hydrophone="69"
-shipInertia NOL_t03.sim---> max_force=240 | eng_power=1800 | eng_rpm=550| --------->>>> R.P.M. listening by hydrophone="no sound"
*I use ship inertia also. thanks, good mod. but i change engpower for listen hyd ships at low revolutions.
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Link:
http://www.subsim.com/radioroom/show...=1#post2044233