Humphrys, Tennant and Dykes was a British engineering company based in Deptford, London, England.

The Russian ironclad Ne Tron Menia was the second of the three Pervenets-class broadside ironclads built for the Imperial Russian Navy during the mid-1860s. She joined the Baltic Fleet upon completion and never left Russian waters. Beginning in 1870 the ship was assigned to the Gunnery Training Detachment and was frequently rearmed. Ne Tron Menia was placed in reserve and hulked a decade later. In 1905 the ship was disarmed and she was sold in 1908. After the end of the Russian Civil War, she was acquired by the Soviets before being sold to a factory in 1925. The ship was sunk in the Siege of Leningrad during World War II and was scrapped after she was salvaged in 1950.