Hi John,
Thank you very much! Again I have to apologize for an inaccurate statement.
You are correct: surface attacks are possible in 1943 and later provided you are not in the radar cone of an escort.
Actually the mod only impacts the visual sensors.
The 'solution' I provided is still rough. More is possible when we get into (the sensors of) the mega mods.
@Kyle: if you need any help, post or contact me directly