FURUNO GP-150 is a GPS navigator designed for the SOLAS ships according to the GPS performance standard IMO Res MSC.112(73) and associated IEC standards effective on and after July 1, 2003. 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.