The present invention includes a method for a combined use of a local positioning system, a local RTK system and a regional, wide-area, or global differential carrier-phase positioning system (WADGPS) in which disadvantages associated with the local positioning system, the RTK and the WADGPS navigation techniques when used separately are avoided. The method includes determining a first position of the object based on information from the WADGPS, and determining a second position of the object based on position information from a local positioning / RTK positioning system. Thereafter, position determined by the WADGPS and the position determined by the local positioning / RTK positioning system are compared. The WADGPS position is used for navigating the object when the WADGPS position and local positioning / position differ by more than a predefined threshold, and using the local positioning / RTK position for navigating the object when the WADGPS position and local positioning / RTK position differ by less than the predefined threshold.