In the Double Blind rules (DBR) under the Spotting Phase, it says "Sensor ranges for airborne units do not change, though LOS exists to all units on the playing area. ... The airborne unit is considered to b in Hex 0909 of the ground mapsheet... "
My understanding is thus, when making the sensor check for non-'aero-on-map' aerofighters and dropships the check is made from 0909 of the map sheet corresponding to their low altitude hex as per TW. This is for simplicity and speed of play despite making the edges sensor blind spots. And I assume as per the rules for 'aero-on-map' that the hex is whatever hex the unit occupies. This all makes sense.
However, the rules for visual ranges is a tad less clear to me for airborne units.
Do the rule for sensors on airborne apply to visual ranges? If so, this means that its nearly impossible to perform any kind of attack with an aerofighter in any night time conditions (non-Dusk/Dawn) as you can only target a handful of hexes at the end of your flight path. And given you can select a flight path that is well off that of hex 0909 or that each velocity forces a move of 16 ground hexes if using 'aero-on-map' it becomes very difficult to obtain the 5 or 10 hexes of visual range needed to execute an attack. The rules as written make aerospace nearly useless at night as you can't even bomb a hex out of visual range as you cannot see it.
I think this needs to be reviewed and clarified.