That was a good read, thanks Wrench!
From the book (about A-7D, E and C (presumably, since it shared avionics with E)):
"Other components of Navigation and Weapon Delivery System (NWDS) included a Doppler radar system, inertial measurement set, air data computer, tactical computer, projected moving map display, armament station control unit, and a forward-looking radar that provided air-to-ground ranging, terrain-following and terrain avoidance, as well as other data. What the NWDS did was give the A-7 a greatly improved weapon delivery accuracy."
It looks like it was possible for said A-7 versions to attack targets at night using all this fancy radar & inertial computers & systems. It wasn't as accurate as day ops until they started to use FLIR pods in 1979, I guess.
So, is it safe to assume A-7C, D & E can be set to DAY_AND_NIGHT in data.ini to better reflect their capabilities? Oh, and in game terms, we have CCIP HUD, ground mapping radar, bright nights and the magic "E" key to melp us deal with the midnight urges.