Abstract. A mathematical model describing operation of the card of a ship's magnetic compass, is developed. The influence of external factors on the model coefficients is demonstrated. Results of experimental studies of the influence of low temperatures and small value of the horizontal component of Earth's magnetic field on transient characteristics and a dead zone of the card carried out with three samples of the magnetic compass are presented. Based on the analysis of obtained results, it is concluded that a decrease in the horizontal component of the Earth's magnetic field vector significantly affects the transition characteristics of the magnetic compass, while a decrease in temperature leads to an increase in the transition process duration.

Keywords: magnetic compass, dynamic characteristics, high latitudes, low temperatures, low value of horizontal component of magnetic field

References:

1. Vu S.Kh., Ivanov V.E., Kumkov S.I., Nguyen D.T. Zhurnal radioelektroniki, 2019, no. 5, pp. 10. (in Russ.)
2. http://www.navydevices.ru/informations/section-publications/publications/85-2002-09-21-13-29-52. (in Russ.)
3. Ermakov S.V. Materialy VI Mezhdunarodnogo Baltiyskogo morskogo foruma (Materials of the VI International Baltic Maritime Forum), Kaliningrad, 2018, рр. 17–29. (in Russ.)
4. https://research.sfu-kras.ru/publications/publication/777470750-545303440.
5. docs.cntd.ru/document/901765675. (in Russ.)
6. Pravila po oborudovaniyu morskikh sudov. Chast' V. Navigatsionnoye oborudovaniye. Rossiyskiy morskoy registr sudokhodstva (Rules for the Equipment of Sea-Going Vessels. Part V. Navigation Equipment. Russian Maritime Register of Shipping) St. Petersburg, 2016. (in Russ.)
7. Pravila shturmanskoy sluzhby N 38. Deviatsionnyye raboty na korablyakh i sudakh voyenno-morskogo flota (Navigation Rules N 38. Deviation Works on Ships and Vessels of the Navy), Main Directorate of Navigation and Oceanography of the RF Ministry of Defense,1994. (in Russ.)
8. Bowditch N. The American Practical Navigator, 1995, vol. 2, 552 р.
9. Denne W. Magnetic Compass Deviation and correction, Nautical Publisher, 1979, 65 р.
10. Pham Van Tan, Van-Suong Nguyen. International Journal of Engineering Research and Technology, 2019, no. 11(12), pp. 1941–1944.
11. Kozhukhov V.P, Voronov V.V, Grigor'yev V.V. Magnitnyye kompasy (Magnetic Compasses), Moscow, 1981. (in Russ.)
12. Blagoveshchenskiy S.N., Kholodilin A.N. Spravochnik po statike i dinamike korablya (Handbook of Ship Statics and Dynamics), Leningrad, 1975, vol. 2. (in Russ.)
13. https://royallib.com/book/akkuratov_valentin/na_novih_trassah.html. (in Russ.)
14. http://www.elektropribor.spb.ru/katalog/navigatsionnye-pribory/azimut-125m-magnitnyy-kompas/. (in Russ.)
15. Emelyantsev G.I., Stepanov A.P. Integrirovannyye inertsial'no-sputnikovyye sistemy oriyentatsii i navigatsii (Integrated Inertial-Satellite Orientation and Navigation Systems), St. Petersburg, 2016, 393 р.