@Drjones: airstrike.cfg will not allow what LGN1 is looking. It only generate more or less air attacks, the AI plane crew propertie (elite, veteran, etc) is only for itīs aiming quality.
@LGN1: If using "Rubini rocket fix" - IIRC - iīm getting old - you can adjust the ProbInsideArc (this is not in use on stock or others mods AFAIK). Lesser the value , less probability to your rwr equipment detect something in time (also the SweepPeriod can be adjusted).
This really brings "probability" to the RWR function.
Perhaps you need to adjust your crew visual sensor too (if they are spooting the planes too early). Adjust the "Surface" for 100 or 120 and they will be almost blind to small ships and airplanes (airplanes are often small ): you will see them just too near your uboat now. Play a bit with these settings and you will really find a good one for your taste. Mine: ProbInsideArc(rwr)=0,3; SweepPeriod(rwr)=20; Surface(visual)=65.
Take in mind that "Surface"(visual) will also mess a bit with your overall visual detection, so donīt change it too much.
Hopes that help you!
Rubini.
PS: donīt forget to also set the PreciseRange to 500m or less.