During the round-the-world expedition of the R/V “Admiral Vladimirsky” (2019–2020), following closely the route of the voyage of Bellingshausen and Lazarev in 1819–1821, a large amount of magnetic data was obtained, including in the Antarctic region. One of the goals of this research has been to determine the position of the South Magnetic Pole (SMP) from experimental data. This was the reason to return to the declination data obtained during the Bellingshausen expedition and to determine the position of the SMP from these data. Several methods have been devised for this purpose. To determine the current position of the SMP, a small polygon survey in the area of its assumed position has been made. The polygon location was chosen based on the forecast of the IGRF-12 model. The three-component measurements on board the R/V “Admiral Vladimirsky” and scalar outboard measurements have been performed and estimates of the current position of the SMP obtained.