[Gatts]

You refer to the ghost ship on Freedom Island, where it turns to normal ship at daytime, or the one you "fish" out with the spell scroll near the flooded village (also in Freedom Islands)? The one, that needs to be levitated in the flooded village will disappear, but you can always buy another spell scroll from the mage near by, the changing ship will trade with you any time, if you don't attack it at night.