An Inclinometer is a device for estimating the inclination of a target ship by relating its range to its length to the angle subtended at the point of the observing instrument.
As the war progressed, difficulties realised in the attempt to base fire control and torpedo control on rangefinder ranges alone impelled the Royal Navy to explore use of the measure of inclination as an alternative.
- Admiralty, Gunnery Branch (1917). Handbook of Torpedo Control, 1916. C.B. 302. Copy No. 141 at The National Archives. ADM 186/381.
- H.M.S. Vernon. Annual Report of the Torpedo School, 1917. Originally C.B. 1474. Copy 7 at The National Archives. ADM 189/37.
- H.M.S. Vernon. Annual Report of the Torpedo School, 1918. C.B. 1527. Copy 20 at The National Archives. ADM 189/38.