It is a highly reliable standalone EPFS (electronic position fixing system) that feeds positioning information to AIS, Radar, VDR, VideoPlotter, Autopilot, Echo Sounder and Sonar. Receiver dependability is improved by fault detection using five satellites, i.e., Receiver Autonomous Integrity Monitoring (RAIM) that shows the integrity status in Safe, Caution, and Unsafe levels. The status is given with respect to user selected accuracy level, 10 m or 100 m. RAIM also works on DGPS signals. The GP150 consists of an antenna and display unit. The display unit is a 6 silver bright LCD, offering optimum viewing around the clock. In order to improve position accuracy, WAAS and DGPS* augmentation systems are available. Dual configuration, with a second