when i was starting to play a&a a while ago, i had the same question about movement…
i went to the official site and it was a FAQ there…
they said something like:
“you can move 4 spaces in total. the possible ways are: 0 combat/4 non-combat; 1 combat/3 non-combat; 2 combat/2 non-combat; 3 combat/1 non-combat”
notice that you can only move 4 spaces in combat if you are attacking a seazone AND you have a carrier there to make a save landing (either the carrier was attacking, too, or the carrier moved there in your non-combat)