The French submarine Amphitrite, constructed during the 1910s and completed in 1918, served as the lead vessel of her class, which included eight submarines designed as improved versions of the Clorinde class. She measured 54 meters (177 ft 2 in) in length between perpendiculars, with a beam of 5.41 meters (17 ft 9 in) and a draft of 3.46 meters (11 ft 4 in). Her displacement was 418 metric tons (411 long tons) on the surface and 614 tons (604 long tons) underwater. The submarine's crew comprised 27 officers and enlisted personnel. Propelled on the surface by two three-manufacture two-cycle diesel engines—specifically six-cylinder Chaléassière engines—Amphitrite was intended to produce 1,300 metric horsepower (1,282 bhp), but during her sea trials in November 1915, she generated only 615 PS (607 bhp), achieving a top surface speed of approximately 12.7 knots rather than the designed 15 knots. After a significant rebuild, her engines produced 1,170 PS (1,154 bhp) in June 1917, boosting her surface speed to around 14.56 knots. When submerged, she was powered by electric motors—each delivering 700 metric horsepower—allowing a submerged speed of about 9.5 knots. Amphitrite's fuel capacity was 12 tons of kerosene, providing her with an endurance of 785 nautical miles at 13 knots on the surface. Submerged endurance was approximately 100 nautical miles at 5 knots. Her armament included eight 450-millimeter torpedoes: two in external bow tubes and six in rotating Drzewiecki drop collars on each broadside, capable of traversing 100 degrees. She was also equipped with a single 47 mm Mle 1885-1915 gun mounted aft of the conning tower. Although Amphitrite saw limited action during World War I, she represents an important step in French submarine design during the early 20th century. She was decommissioned and sold for scrap in 1936, marking the end of her maritime service.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.