Carrier-based fighter movement

No.  Since there are no air bases on either island, it is a six-space move to get from Midway to New Zealand.  A bomber could do it, but not a fighter.  Incidentally, air units can fly over enemy units, so you wouldn’t have to control everything between the two islands.

I really like naval bases, :-DI like to built about 6-12 subs on the west Coast on my first few turns and it’s really nice when I advance my carrier task force from Hawaii to the Marshalls, I like sending some of my subs to Midway to keep the Japs from going around my force and taking Pearl. :-DAnd the Naval base really helps there.

Air cap does not stop subs.

If you’ve read the rulebook carefully, you should know the answers:

In non-combat movement, you can only move your units that you did not move during the combat movement phase. Once a transport unloads, its move ends.

Thank you!

I am uncertain on how air bases are used? Can you help me out?

ssolie is correct, your planes under no condition, can they move more than 4 territories on your turn. If they were on an allied carrier then on the allies turn the carrier moves, on your turn you can move the plane 4.

When a carrier is sunk the planes can move one space. So if a carrier was in an adjacent territory or an island with an airbase yes the planes could land there. The planes could not fly to the adjacent territory then land on an island without an airbase.

BB

To take a convoy, you MUST move in the Combat Phase ALWAYS, even if there are no actual defending enemy units there. An aircraft carrier will take the convoy as effectively as any other vessel.

The planes (if any) can then land on the aircraft carrier after their mission (wherever it was). Don’t forget that you cannot send planes on a suicide mission - it must be POSSIBLE for them to reach either friendly land or a carrier after their battle, even if the chances of their surviving are almost infinitesimally small.

Caractacus.