The method of extraction of characteristic points from the radar image of the seashore for the needs of positioning system

The problem of continuous position availability is one of the most important issues connected with human activity on the sea. Because the availability of the electronic navigational systems can be limited in some cases (for example military operations) we should considered additional methods of gathering information about ship's position. In this paper one of these methods is presented, which is based on extraction specific features from radar images - characteristic points of the coast line.