The Admiralty Compass Observatory Collection comprises correspondence papers and reports, 1842-1950 transferred from the Public Record Office (The National Archives), Kew in 1983, Papers from the Scientific and Technical Review Section (S&T) 1890- 1970 acquired in 1993 and 1996 also from the Public Record Office, (The National Archives), Kew. Further to these series the collection is divided into twelve sections of material deposited from the National Archives, Kew, in 1983. These are HM Ships Compass Bearings 1842-1918, Swing Books 1904-30, Admiralty Compass Department D Series, N Series 1870-1980, R series 1826-1946, Reports 1956-62, Compass Department Examination of Instruments, Compass Observations and Experiments 1842-1933, Magnetic Elements of HM Ships 1864-1918, further correspondence and papers 1873-1914, handbooks and miscellaneous material 1842-1953, manuscripts removed from the Compass Department Library and catalogues, inventories and indexes.
Admiralty Compass Observatory
GB 0064 ACO
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Collection
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1842-1971