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Hydra-class sloop

The Hydra class were a class of three paddlewheel steam sloops of the British Royal Navy. They saw active service variously in the Baltic during the Crimean War, against Ottoman forces in Syria and against slavers in West Africa. Latterly, Hydra and Hecate were used for surveys in the Mediterranean, the Pacific, Australia and the Atlantic, and thus their names were re-used for the Hecla-class survey vessels in the late 20th century. Two of the classes were broken up after more than twenty-five years of service, and Hecla was sold for commercial use in 1863.

Design
The ships were designed by Sir William Symonds and were approved on 3 November 1837. They were built of wood, displaced 1,096 tons and had a length on the gundeck of . Hecla had her engines replaced in her 1848–1849 refit. Crew They had a complement of approximately 135 men. ==Service==
Service
Hecate east of Cape Flattery in 1861 Hecate served in the Mediterranean from 1840 to 1843, including operations against the Ottomans in Syria in 1840. From 1845 to 1857 she served off the west coast of Africa, including anti-slavery operations. In 1860 she became a survey vessel, and under George Henry Richards she made a survey of Vancouver Island. Hydra With Hecate, Hydra served in the Mediterranean, including the 1840 Syria operations. She served from 1840 to 1862 on both seaboards of the North and South Atlantic, including the period 1858 to 1862, when she was commanded by Richard Vesey Hamilton, later to become First Naval Lord. In 1863 she conducted survey work in the Mediterranean. Hecla From her commissioning in 1839 to 1854 Hecla served in the West Indies, in the Mediterranean and on the west coast of Africa. In February 1854 she reconnoitred the Baltic for British operations there during the Crimean War, and from March to November 1854, under the command of Captain William Hutcheon Hall, who had taken command of the small vessel because a warship of the size appropriate to his seniority was not available. She served off the west coast of Africa until 1859, and was sold to Williams & Co. for £2,550 for commercial use on 15 June 1863 and renamed Typhoon. ==Ships==
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