French ironclad Amiral Tréhouart
Amiral Tréhouart was the second and last coast-defence ships built for the French Navy () in the early 1890s. Completed in 1896, little is known about her service. During World War I, the ship served as a submarine tender. She was sold for scrap in 1920. Design and description. The "Bouvines"-class coast-defence ships were ordered in accordance with the 's belief in the primacy of coastal defences and commerce raiding. The ships were long at the waterline and long overall. They had a beam of and a draft of forward and aft. They displaced . Once  in service they proved to roll badly so bilge keels were later fitted. The crew of the "Bouvines" class numbered 15 officers and 318 ratings; service as a flagship added 5 more officers and 33 more ratings. The "Bouvines"-class ships were powered by two inclined horizontal triple-expansion steam engines, each driving one propeller shaft. "Amiral Tréhouart"s engines used steam provided by 16 Belleville boilers that exhausted through a single funnel. The engines produced a total of and gave a top speed of on trials. The ships carried enough coal to give them a range of at a speed of  . Armament and armor. The "Bouvines"-class ships carried their main battery of two Canon de Modèle 1887 guns in two single-gun turrets, one each fore and aft of the superstructure. Their secondary armament consisted of eight Canon de Modèle 1892 guns, four of which were mounted in individual casemates. The other four were carried on pivot mounts with gun shields on the shelter deck directly above the four casemated guns on the corners of the superstructure. Initially four Canon de Modèle 1885 Hotchkiss guns were carried for defence from torpedo boats in the fighting top in the military mast, but  this was later increased to eight, with the new guns on the superstructure. Initially ten Hotchkiss revolving cannon were positioned on the superstructure, but this was reduced to three when the additional 47 mm guns were added. Two torpedo tubes were mounted above the waterline, but they were removed in 1906. The "Bouvines" class had a full-length waterline armor belt of steel that tapered from the maximum thickness of amidships to at the ship's ends. The ships were intended to have of the belt showing above the waterline, but they were overweight as completed and only of the  belt was above the waterline. The maximum thickness of the armored deck was and it was joined to the top of the armor belt. The main turret armor was thick although the barbettes were only thick. The plates protecting the conning tower measured in thickness. Construction and career. "Amiral Tréhouart", named for Admiral François Thomas Tréhouart, was authorized in the 1889 Naval Programme and was ordered from Arsenal de Lorient. The ship was laid down on 20 October 1890 under the name of "Tréhouart" and launched on 16 May 1893. She was given her final name on 25 March 1895  and was completed on 29 June 1896. In 1914 "Amiral Tréhouart" became a submarine depot ship. She was sold for scrap on 4 July 1920, but was not broken up until 1922.