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Admiralty Compass Observatory, 1842-1971 (Manuscript) 1944-02-01 ACO/S&T/22/9
Compass Swinging in Flying Boats, an appreciation by Coastal Command and report number 44/55 on a trial of Admirralty bearing plate pattern 42 for swinging flying boat compasses.
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1957-1958 ACO/S&T/10/15
Report, Sperry Mark 22, Mod 0, gyro-compass report of trial results at the ACO.
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1893-04-01 ACO/S&T/20/14
Notes by E W Creak, ACO, on the series of observations of magnetic variation obtained by Lieutenant Hotham, on board the SIRIUS.
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1950-05-01 ACO/S&T/22/5
Report D24-1/50 concerning the installation of stand-by compasses in Vampire aircraft by the Experimental and Proving Establishment of the Royal Canadian Air Force, Rockville, Canada.
Admiralty Compass Observatory: reports, technical notes and memoranda from the Royal Aircraft Establishment (RAE), Farnborough (Manuscript) 1949-07-01 ACO/S&T/14/5
RAE report number IAP 1456: Review of navigation (bomber and military transport aircraft) by D E Adams and R Hanbury-Brown.
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1959 ACO/S&T/29/4
The Sperry Mark 22, Modulation O, Gyroscopic Compass final report of the trials at the Admiralty Compass Observatory and at sea.
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1942-1943 ACO/10/6
Handbook, German, 1942-1943, Plath Transmitting Magnetic Compass, drawings
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1900 - 1914 ACO/7/15
Electrical trials at Portsmouth, Volume 1, 1914, contains earlier excerpts, 1900 - 1907