One thing, if the Carriers off GIB are damaged, they can’t have planes on them.
Just to be clear damaged carriers can’t have fighters on them of the same Power. They can have fighters of a different Power on them even if they are damaged.
The reason being fighters of the same Power are considered airborne during the active Turn or when defending; thus they are always in the air when the carrier is damaged and thus cannot land. However, fighters from a different Power are in the air only while defending; they are still on the carrier if the carrier is attacking. So, if the carrier is damaged the fighters are stuck until the carrier repairs.