Problems with Precise Matching Radar Image to the Nautical Chart

In ECDIS systems, the radar display is overlapping the chart at the position set out by GPS or other navigational system. In case this information is lost, the radar image is overlapping the point of the reckoned position. The paper presents a different method of integration of the radar image with ECDIS system display. At this stage, using the comparative methods applied in navigation has been suggested. They are associated with methods of digital displays’ acquisition and processing.