Another experimental boat built at Cherbourg. The submerged displacement is about 810 tons, and the length and beam 212 feet and 22 feet respectively. Steam turbines are used for surface propulsion and electric motors when submerged. Her speed is 15 knots above and 10 knots below. The armament is seven 18-inch torpedoes, and the complement 24 officers and men.
Photo, M. Bar.]
A FRENCH SUBMARINE OF THE SEA-GOING TYPE.
Mariotte.
(Completed 1912.)
The third experimental boat, of the Rodiquet type, built at Cherbourg. The displacement when submerged is 650 tons and the length about 200 feet. Petrol motors of 1,500 H.-P. drive her at 15 knots an hour on the surface and electric motors of 550 H.-P. at 10 knots when submerged. Her radius of action is 3,000 miles, and her armament seven 18-inch torpedoes, which can be fired from both bow and stern tubes. The complement is about 25 officers and men.
Charles Brun.
(Completed 1912.)
The fourth experimental vessel, built at Cherbourg during 1909–12. The submerged displacement is 450 tons and the length 145 feet. Steam turbines of 1,300 H.-P. drive her at 15 ½ knots an hour on the surface, and electric motors of 500 H.-P. at 10 knots when submerged. Her armament consists of six 18-inch torpedoes. The complement is 22 officers and men.