↑ Li Shu-hua, p. 176 1 2 Lowrie William Fundamentals of Geophysics — London: Cambridge University Press, 2007. — P. 281. — ISBN 978-0-521-67596-3. ↑ Kreutz, p. 367 ↑ Needham, p. 252 ↑ Li Shu-hua, p. 182f. ↑ Kreutz, p. 370 1 2 Schmidl, Petra G. (2014-05-08), "Compass", in Ibrahim Kalin, The Oxford Encyclopedia of Philosophy, Science, and Technology in Islam, Oxford University Press, pp. 144–6, ISBN 978-0-19-981257-8 ↑ The magnetic lines of force in the Earth's field do not accurately follow great circles around the planet, passing exactly over the magnetic poles. Therefore the needle of a compass only approximately points to the magnetic poles. ↑ Declination Adjustment on a Compass – REI Expert Advice. 6 июнь 2015 тикшерелгән. ↑ Guarnieri, M. (2014). «Once Upon a Time, the Compass». IEEE Industrial Electronics Magazine 8 (2): 60–63. DOI:10.1109/MIE.2014.2316044. ↑ Merrill Ronald T. The Earth's magnetic field: Its history, origin and planetary perspective — 2nd printing. — San Francisco: Academic press, 1983. — P. 1. — ISBN 0-12-491242-7. ↑ Lane, p. 615 ↑ W. H. Creak: "The History of the Liquid Compass", The Geographical Journal, Vol. 56, No. 3 (1920), pp. 238-239 ↑ Gear Review: Kasper & Richter Alpin Compass, OceanMountainSky.Com ↑ Nemoto & Co. Ltd., Article Archived 2008-12-05 at the Wayback Machine.: In addition to ordinary phosphorescent luminous paint (zinc sulfide), brighter photoluminescent coatings which include radioactive isotopes such as Strontium-90, usually in the form of strontium aluminate, or tritium, which is a radioactive isotope of hydrogen are now being used on modern compasses. Tritium has the advantage that its radiation has such low energy that it cannot penetrate a compass housing. 1 2 Johnson, G. Mark (2003-03-26). The Ultimate Desert Handbook. McGraw-Hill Professional. p. 110. ISBN 0-07-139303-X. ↑ Johnson, G. Mark (2003-03-26). The Ultimate Desert Handbook. McGraw-Hill Professional. pp. 110–111. ISBN 0-07-139303-X. ↑ Kjernsmo, Kjetil, '[www.learn-orienteering.org/old/buying.html How to use a Compass], retrieved 8 April 2012 ↑ Johnson, G. Mark (2003-03-26). The Ultimate Desert Handbook. McGraw-Hill Professional. p. 112. ISBN 0-07-139303-X. ↑ U.S. Army, Map Reading and Land Navigation, FM 21-26, Headquarters, Dept. of the Army, Washington, D.C. (7 May 1993), ch. 11, pp. 1-3: Any 'floating card' type compass with a straightedge or centerline axis can be used to read a map bearing by orienting the map to magnetic north using a drawn magnetic azimuth, but the process is far simpler with a protractor compass. ↑ 'Article MIL-PRF-10436N, rev. 31 October 2003, Washington, D.C.: U.S. Dept. of Defense ↑ Kearny, Cresson H., Jungle Snafus...And Remedies, Oregon Institute Press (1996), ISBN 1-884067-10-7, pp. 164-170: In 1989, one U.S. Army jungle infantry instructor reported that about 20% of the issue lensatic compasses in his company used in a single jungle exercise in Panama were ruined within three weeks by rain and humidity. ↑ Ministry of Defence, Manual of Map Reading and Land Navigation, HMSO Army Code 70947 (1988), ISBN 0-11-772611-7, ISBN 978-0-11-772611-6, ch. 8, sec. 26, pp. 6-7; ch. 12, sec. 39, p. 4 ↑ "Military Compass". Orau.org. Retrieved 2009-06-30. ↑ CRC Handbook of Chemistry and Physics. page B247 ↑ Kramer, Melvin G., U.S. Patent No. 4175333, Magnetic Compass, Riverton, Wyoming: The Brunton Company, pub. 27 November 1979: The Brunton Pocket Transit, which uses magnetic induction damping, is an exception. 1 2 Johnson, G. Mark (2003-03-26). The Ultimate Desert Handbook. McGraw-Hill Professional. pp. 113–114. ISBN 0-07-139303-X. 1 2 Global compasses, MapWorld. ↑ Johnson, G. Mark (2003-03-26). The Ultimate Desert Handbook. McGraw-Hill Professional. p. 122. ISBN 0-07-139303-X. ↑ Lushnikov, E. (December 2015). "Magnetic Compass in Modern Maritime Navigation". TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation. Gdynia, Poland: Faculty of Navigation, Gdynia Maritime University. 9 (4): 539–543. doi:10.12716/1001.09.04.10. ISSN 2083-6481. Retrieved 11 February 2016. ↑ Wright, Monte, Most Probable Position, University Press of Kansas, Lawrence, 1972, p.7 ↑ Johnson, G. Mark (2003-03-26). The Ultimate Desert Handbook. McGraw-Hill Professional. p. 149. ISBN 0-07-139303-X. 1 2 Johnson, G. Mark (2003-03-26). The Ultimate Desert Handbook. McGraw-Hill Professional. pp. 134–135. ISBN 0-07-139303-X.