[Fyron]

Ship and fleet experience are entirely separate. You could replace all of the ships in an experienced fleet and the fleet itself will still have the same experience level. Careful though, because if you remove all ships from a fleet, it disappears, and all of its accumulated experience is gone.

You gain ship and fleet experience separately, according to different formulae. The experience bonus from the fleet stacks with the ship's own experience bonus.

Ships with high experience do not confer any bonus to other ships in the same fleet. Unless you use the Neural Combat Net components, however.