Modern weapons, technological systems, and facilities used in our days mainly are either managed with digital topographic maps produced in WGS-84 (World Geodetic System-1984) coordinate system or are connected with Military Geographic Information System (MGIS) created on the base of this coordinate system. If we use topographic maps based on the 1942 coordinate system in computer systems of modern weapons, and other technological systems and facilities, then it will be inevitable to encounter some geodesy related errors. In this article, these errors and their possible solutions are explained in the case of using the Krassovsky coordinate system in Azerbaijan.