A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying passengers or goods, or in support of specialized missions, such as defense, research and fishing.historically, a "ship" was a sailing vessel with at least three square-rigged masts and a full bowsprit.ships are generally distinguished from boats, based on size, shape, load capacity. The lucrehulk-class battleship was the primary capital ship of the trade federation's trade defense force. most lucrehulks were modified from enormous cargo haulers. upgraded and modified versions were later used by the cis navy, the separatist holdouts, the alliance to restore the republic, the....