Aircraft carriers could be reworked so that they can earn xp from their aircraft and fleets and armadas add 1 aircraft capacity each. In return, their promotion tree should change to better integrate into a fleet. Furthermore, the act of launching an aircraft should cost 3 movement.
- Level 1: Armoured Flight Deck: +10 CS on the defence
- Level 2: Angled Flight Deck: Movement cost to launch aircraft reduced to 2
- Level 3: Advanced Engines: +2 movement
- Level 1: Combat air patrol: +15 anti air strength to all naval units within 2 tiles. +2 sight range.
- Level 2: Carrier Flagship: +5 CS to all naval units in 2 tiles.
- Level 3: Deck Crews: Can heal outside of friendly territory and after attacking.
- Level 4: Supercarrier: +2 additional aircraft slots.