The only time I have built an air base for Holland is when doing sea lion from sz110. It was a long time ago, but I believe I did it because the US had a couple loaded carriers (sz102) and bombers in range to hit my tpt fleet after the assault on London. I think we were testing out sea lion theories at the time, so the allied player knew that sea lion was a good possibility.
This seems to involve two different types of attacks.
Is the capital ship itself being attacked? Or is it an SBR on the Naval Base?
If it is the ship itself, then the AA from the Naval Base can NOT fire.
If it is an SBR, then the AA from the Naval Base CAN fire. However, the capital ship can not defend the naval base.
So the way I see it… Japan could move the 2 destroyers during the combat phase as required, fight the American ships with different units, and than move the destroyers back into 25 during the non combat phase after the zone has been cleared. Â
Nope. Sea (and land) units that move in combat movement and/or participate in combat may not move in noncombat movement.