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Heeling and Pitching Error Correction without local Readjustment

Published online by Cambridge University Press:  18 January 2010

T. H. O'Beirne
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Extract

This paper first gives a brief account of the deviation theory applicable to magnetic compasses and a unified theoretical treatment of the principal heeling-error and pitching-error effects. Consequences of symmetry in soft-iron correctors are then considered, and a system of six equal soft-iron spheres at equal distances along three mutually perpendicular axes is shown to have no effect at the compass position, any diametral pair thus having a complete negative counterpart in the remaining four.

This leads to the deduction of the possibility of a simple form of corrector system in which soft-iron correctors remove those parts of the principal inclination errors which are due to induced magnetism. If the remaining part due to permanent magnetism is assumed to be removed by vertical magnets in the usual manner, the correctors when once adjusted would then require no readjustment on change of locality, in distinction from all known correctors at present in use or in course of manufacture, which require continual readjustment in these conditions.

Type
Research Article
Information
The Journal of Navigation , Volume 2 , Issue 4 , October 1949 , pp. 324 - 337
Copyright
Copyright © The Royal Institute of Navigation 1949

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References

Admiralty Manual of Navigation 1938, Vol. 1, Chap, 10 and Vol. 3, Chap. 21. H.M. Stationery Office.Google Scholar
Admiralty Compass Observatory, 1943. Notes on the Correction of the Magnetic Compass in Ships.Google Scholar
Evans, F. J., and Smith, A., 1865. On the magnetic character of the armour-plated ships of the Royal Navy, and on the effect on the compass of particular arrangements of iron in a ship, Phil. Trans. Roy. Soc., Vol. 155, pp. 263–323.Google Scholar
Guyou, E., 1889. Description et usage des instruments nautiques (Paris).Google Scholar
Admiralty Manual of the Deviations of the Compass, 1906, 7th edition. H.M. Stationery Office.Google Scholar
Admiralty Compass Observatory, 1936. The Theory of the Deviations of the Magnetic Compass in Iron Ships: B.R. 101.Google Scholar
Admiralty Compass Observatory, 1948. The Theory of the Deviations of the Magnetic Compass: B.R. 101 (48).Google Scholar
Dunoyer, L., 1909. Etudes sur les compas de marine (Doctorate thesis of the University of Paris).Google Scholar
Tonta, L., 1911. Come si possa compensare stabilmente la quadrantale di una bussola a grande momento magnetico, Rivista Marittima, Vol. 44, Part 4, pp. 27–36.Google Scholar
Tonta, L., 1913. Sui compensatori allungati e sul compensatore stabile della quadrantale, Annali Idrografici, Vol. 8 (1911–12), pp. 433–447.Google Scholar
Ogloblinsky, N., 1928. Compas magnétique liquide à induction compensée, Revue Maritime, Nouvelle Série, No. 98 (Feb.), pp. 145–171.Google Scholar
Tonta, L., 1928. Concerning the correction of the quadrantal error in compasses of large magnetic moments, Hydrographie Review, Vol. 5,. pp. 173–180.Google Scholar
O'Beirne, T. H., 1946. Abnormal pitching and heeling errors at bad magnetic compass positions in armoured vehicles and aircraft, Journal of the Royal Naval Scientific Service, Vol. 1, No. 6, pp. 208–216.Google Scholar
Harvey, G. N., 1948. A new system of compass correction, this Journal, Vol. 1, No. 3, pp. 197–218.Google Scholar
Harvey, G. N., 1949. Magnetic compass problems—a fresh approach, this Journal, Vol. 2, No. 3, pp. 230–242.Google Scholar