The World Storyline
The Aerial Fleet is a convoy guarding a giant. Several thousand years ago, an accident occurred, causing both the fleet and the monster to be cursed to wander the skies forever.
The Aerial Fleet was a bonus dungeon in .hack//INFECTION. Kite traveled here along with couple of his friends after receiving a mysterious email. Reaching the ship's core. they discovered the fearsome Parasite Dragon. After a long and grueling battle, Kite was able to successfully defeat the dragon, using his Data Drain to obtain the rare item Hyakkidouran.