Yes, I was talking about those, I was also thinking about their role in sea battles (against Subs):
Unlike fighters, they don´t need to end their move in a territory with friendly Inf, but they can move max 3 spaces away from a territory with friendly Inf
If there is an Airship involved in sea battle then:
Enemy submarines can not submerge and they can not surprise attack
Airships roll one dice against enemy Sub, hitting it at die roll of 2.