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Nautilus (1800 submarine)
''Nautilus'' was a submarine first tested in 1800. Though preceded by Cornelius Drebbel's vessel of 1620, ''Nautilus'' is often considered to be the first practical submarine.
==Background==
The ''Nautilus'' was designed between 1793 and 1797 〔 by the American inventor Robert Fulton, then living in the French First Republic. He unsuccessfully proposed to the Directory that they subsidize its construction as a means to balance British seapower. His second, also unsuccessful, proposal to them was that he be paid nothing until the ''Nautilus'' had sunk British shipping, and then only a small percentage of the prize money. Fulton directed his next proposal to the Minister of Marine, who granted him permission to build.〔
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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