Ships which do not start the campaign in theatre must be purchased with resource points, which are accumulated daily. CV flight deck damage is monitored seperately from the above. For example, running around at full speed slowly causes ship damage, but never affects CV flight decks. Squadrons have an experience and a morale level. All new planes enter at level 50, and can be trained to level 75 via non-combat missions.
Morale is equal to exp when a squadron is fully rested.
When it flies or takes losses, morale drops. Exp increases faster after successful missions. All plane types are included that were historically present, including seaplanes. Switching a squadron to a new plane type drastically decreases their exp level. Planes may be shot down or take various amounts of damage, affecting their repair time.