Born in 1776 at Sedbergh, Yorkshire. Inman received his early education at Sedbergh Grammar School, and then became a pupil of John Dawson. Although he entered St John’s College, Cambridge in 1794, he did not take up residence until 1796. After graduating in 1800, he intended to undertake missionary work in Syria, but due to the war, could travel no further than Malta; he then decided to stay in Malta and study Arabic.
When he returned to England, he was recommended to the Board of Longitude for the position of Astronomer on board the discovery ship HMS Investigator, and in June 1803 he joined the ship. After exploratory and navigational survey work in Australian waters for the Royal Navy, he returned home in 1804. In 1805 he gained his Masters degree, and in the same year was ordained, although he did not take up any ecclesiastical office. In 1815 he became a Bachelor of Divinity and in 1820 a Doctor of Divinity.
When the Royal Naval Academy at Portsmouth became the Royal Naval College in 1808, Inman was appointed Professor of nautical mathematics. He remained in this post for thirty years. In 1821 he published his work entitled, Navigation and nautical astronomy for seamen; these nautical tables have been used by generations of seamen for solving nautical problems connected with observations of the sun, moon and stars. It has also been claimed that it was Inman who suggested to Captain Broke some of the improvements in naval gunnery which were introduced on board the HMS Shannon. In 1828, he published An introduction to naval gunnery. He also produced short treatises on Arithmetic, algebra and geometry, in 1810, and Plane and spherical trigonometry, in 1826.
At his suggestion, the Admiralty established a school of naval architecture in 1810, and Inman was appointed Principal. In 1820, due to the lack of textbooks on the subject, he published A treatise on shipbuilding, with explanations and demonstrations respecting the architectura navalis mercatoria, by Frederick Henry de Chapman,…translated into English, with explanatory notes, and a few remarks on the construction of ships of war, and Inman’s translation of this work helped to improve English shipbuilding during the first half of the nineteenth century. In 1839 Inman retired from the college. For the next twenty years he continued to live in Portsmouth, and died in Southsea on 2nd February 1859.
© Royal Naval Museum Library, 2000
The information contained in this fact sheet is correct as far as we are able to ascertain from our sources. It is not intended to be an exhaustive or complete history of the subject. Please contact the library for a bibliography of further reading materials, if available.