Naval Air Squadrons - but not army air factors - may target individual fast carriers, which may themselves make a separate defence roll prior to being attacked. It will be recalled that a fast carrier has 2 or 3 factors - if each factor is "destroyed" or damaged twice by the attack, the ship as a whole is deemed "sunk", while if each factor is either "destroyed" or damaged once, the ship as a whole is deemed to be "damaged" and must leave the combat (attacking NAS must return to the aircraft carrier from which they took off, or be lost if she has been sunk, although those flying CAP may land at any carrier or friendly land base (at the cost of inverting)). Any other result (i.e. at least one carrier factor remaining in pristine condition) is deemed to be repaired at sea and the carrier begins the next round of combat with all factors once again intact.