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Thomas Wilson (shipwreck)
The ''Thomas Wilson'' was a whaleback freighter built in 1892 and used to haul bulk freight on the Great Lakes. The ship sank just outside the harbor of Duluth, Minnesota, on Lake Superior, on 7 June 1902, after a collision with the ''George Hadley''. The ''Thomas Wilson'' is one of the best remaining examples of a whaleback steamer, and it is also significant for the changes made in operating procedures at the Duluth harbor. The remains of the ship were listed on the National Register of Historic Places in 1992.
== Ship ==
The whaleback was designed by Captain Alexander McDougall to carry cargoes of iron ore or grain economically around the Great Lakes. A pair of coal-fired Scotch boiler engines provided steam for the three-cylinder, triple expansion steam engine which drove a single screw propeller. The hull was built of heavy steel plates double-riveted to steel angle frames. The bow and stern were of a conoidal shape, with the center part of the hull being roughly cigar-shaped. The ship was 308 feet (94 m) long, with a beam and a deep hold. The hatches on the deck had no coamings, vertical sections that would have prevented water from coming into the hatches. Instead, the hatches were designed to be flush with the surface of the deck, and were simply bolted to the deck. The ''Wilson'' was the last whaleback built without hatch coamings.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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