This is going to be another great addition to Sh3
Were sensor ranges effected by weather in real life, if so maybe its possible to do similar to h.sie WIP Torpedo duds fix by applying decreasing range by waveheight
And also as mentioned above with the Vampire Vision of players U-Boat (Sensors.dat) and the AI Visuals (AI_Sensors.dat) could these be decreased as light levels dropped.
So there would be different values applied to Visual sensor for Dawn, Day, Dusk, Night and possibly Fogy conditions.
Any changes required to files for your Mod to work, will be Included with the U-Boot_HAD Mod to maintain compatibility with your work