Main Page | See live article | Alphabetical index Nautilus was the first practical submarine, commissioned by Napoleon and designed by the American inventor Robert Fulton. Testing of this craft was successfully carried out in France in 1800-1801, when Fulton and three mechanics descended to a depth of 25 feet. Further tests in Britain proved successful in destroying heavy brigs in 1805. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.