Nope, they start counting the first zone they “move” into.
Remember they are considered air borne at the beginning of the turn so they do not ride on the carrier, they just land on it later.
When it says southern italy gets a naval base, do ships in both its seazones get the naval base advantages? Same question for southern englands naval base.
Why yes, it would.
The same applies to:
-Germany SZ 113/114
-Gibraltar SZ 91/92
-Novgorod SZ 115/127
-Normandy SZ 105/110
-Egypt SZ 81/98
I wish they were as straight forward as Pacific 40, only giving the bonuses to 1 seazone each. Placing them on a single coastline makes the board look cooler :x.
In AAP40, placing a Naval Base at Alaska would effect 2 seazones.
I think the way it is will work fine for AAE40/AAG40.