[Loser]

Originally posted by Saber Cherry:
If you add more ships to that fleet, now, will the fleet XP stay the same, decrease proportionately to the (number of ships you add)/(number already there), or will the fleet bonus disappear instantly because the fleet changed?

You can completely change the ships in the fleet and the bonus will stay the same. It sticks-good to he fleet itself, like it's the commander of the fleet, and does not count on any ship.