Question:
Why are there NA air units if no tactical bombing missions can be flown at night?
Answer:
Obviously, type NA air units can fly transfer missions at night without fear of crash landing! Actually, if we ever allow (some) tactical bombing missions at night, then these air units are already rated and will automatically retrofit. Don’t hold your breath waiting for night tac bombing, however. The case for this having any appreciable effect at Europa scale is rather tenuous. Still, someone someday may marshal enough data to convince me otherwise. [TEM 38/39, Errata1]
Source:
Errata published at http://www.hmsgrd.com/Files/Europa/Second Front/Second Front.pdf
Note:
Modify the success table die roll by +2 for day air units checking for crash landing after flying night air missions. (Source: TEM 59/60)

