The program "iDrifter" serves the continuous monitoring of the position (anchorfix) for anchoring yachts. The program displays graphically the current drift of the yacht relating to the anchor selectable either as a radar graph or as a map graph. For this purpose, the current position in relation to the anchor will be identified once per second and digitized as a dot on the display. As soon as a specific distance adjustable by the skipper- to the anchor fix will be exceeded, an acoustic alarm will resound. + Continuous numerical display of the position+ Positioning in numerical display + Speed over ground + Course over ground + Display of the course over ground in compass view + Display of the drift in radar view + Display of the drift in GoogleMaps + Automatical restart after resetting + Adjustable alarm barrier for acoustic alarm + Adjustable GPS accuracyPleas note:"Continued use of GPS running in the background can dramatically decrease battery life."