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| | ship. The Columbia Encyclopedia, Sixth Edition. 2001-05 |
 | | Heavy, slow ships with round bottoms were used to transport grain, while slim-keeled ships such as the trireme were used for warfare (see galley). |
 | | In the Middle Ages Viking ships, propelled by both oars and sails, carried Leif Eriksson to America; their structure is well known from such evidences as the Gokstad ship (unearthed in 1880), which is 80 ft (24.4 m) long, 16 ft 6 in. |
 | | Modern freight ships are equipped with powerful machines for handling cargo; and, although jet transportation led to the demise of the great ocean liners, cruise ships continue to be built, providing the luxuries of the finest hotels. |
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