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Book 10, Gyro Compasses as fitted in Armed Merchant Cruisers and Yachts, c. 1931-1946 (Manuscript) 1931-1946 ACO/3/16
Book 10, Gyro Compasses as fitted in Armed Merchant Cruisers and Yachts, c. 1931-46
HM Ships compass bearings, B-S, 1897 (Manuscript) 1897 ACO/1/41
HM Ships compass bearings, B-S, 1897, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1910 ACO/8/5
Magnetic Elements of HM Ships, A-Z log, "from 1910", Torpedo Craft, Submarines and Auxiliaries
Admiralty Compass Observatory, 1842-1971 (Manuscript) ACO/4/29/4
Miscellaneous papers, Press Coverage of Porte's projected flight, mainly American coverage, n.d.
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1906 ACO/8/4
Magnetic Elements of HM Ships, A-Z log, "from 1906, TBD's (Torpedo Boats and Destroyers"
Book 1, Gyro Compasses as fitted in Naval Ships (Manuscript) 1930-1946 ACO/3/6
Book 1, Gyro Compasses as fitted in Battleships, Battle Cruisers, Aircraft Carrier, Depot Ships, Minelayers, Monitors, Sloops, Surveying Vessels, Schools, 1930- 46
HM Ships compass bearings, N- Z, 1894 (Manuscript) 1894 ACO/1/34
HM Ships compass bearings, N- Z, 1894, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass
HM Ships compass bearings, A- M, 1891 (Manuscript) 1891 ACO/1/27
HM Ships compass bearings, A- M, 1891, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1918 ACO/8/9
Magnetic Elements of HM Ships, A-Z log, "from 1918", Torpedo Craft, Submarines and Auxiliaries
HM Ships compass bearings, N- Z, 1891 (Manuscript) 1891 ACO/1/28
HM Ships compass bearings, N- Z, 1891, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1873-1889 ACO/9/1
Registers of correspondence, "Compass Department Memoranda", 1873-1889, includes examples of magnetic anomalies, poor compass performance and various compass suggestions
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1914 ACO/4/29/5
Correspondence with Kelvin, Bottomley and Baird, re: the compass, 1914
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1916 ACO/8/7
Magnetic Elements of HM Ships, A-Z log, "from 1916", Battleships and Cruisers
HM Ships compass bearings, A- Z, 1890 (Manuscript) 1890 ACO/1/26
HM Ships compass bearings, A- Z, 1890, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1945 ACO/4/30
'A History of Navigation Instruments in the Royal Air Force' by Flight Lieutenant W. L. Gillespie RAF, June 1945
HM Ships compass bearings, N- Z, 1892 (Manuscript) 1892 ACO/1/30
HM Ships compass bearings, N- Z, 1892, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass
Articles on Determination of position in Airships and Balloons, 1909 onwards (Manuscript) 1909 ACO/4/27/2
Articles on Determination of position in Airships and Balloons, 1909 onwards
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1843 ACO/7/14
Register of the Examination of Instruments, 1843
HM Ships compass bearings, A- Z, 1888 (Manuscript) 1888 ACO/1/24
HM Ships compass bearings, A- Z, 1888, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass
Swing book, 1927-8, Battleships, Cruisers and Auxiliaries (Manuscript) 1927-1928 ACO/2/17
Swing book, 1927-8, Battleships, Cruisers and Auxiliaries, ships swung in order to test the deviation of the compass
Admiralty Compass Observatory, 1842-1971 (Manuscript) 1914 ACO/4/29/2
Series of Correspondence, Creagh- Osborne and Porte, re: the compass and the route, 1914
HM Ships compass bearings, A- Z, 1887 (Manuscript) 1887 ACO/1/23
HM Ships compass bearings, A- Z, 1887, Series of bound manuscript volumes of compass bearings data for HM ships, the data is arranged alphabetically by ship name. The volumes contain a record of observations for deviation by comparing the standard compass with the magnetic compass