The new navigation products from Saab are self-monitoring and extremely user friendly. They perform continuous RAIM (Receiver Autonomous Integrity Monitoring) calculations. This allows the Officer Of the Watch (OOW) to set the required navigation accuracy for any stage of the journey. The R4 Navigation System will then give continuous feedback on whether the accuracy requirement is being met. R4 GPS Navigation Sensor The new R4 GPS Navigation Sensor is a high- precision GPS receiver, capable of receiving WAAS, EGNOS and MSAS differential corrections. The unit performs continuous RAIM calculations, which enhance the integrity of the position data. R4 DGPS Navigation Sensor The new R4 DGPS Navigation Sensor is the ultimate sensor for any Commercial Marine application. This product has all the features of the GPS Sensor and a dual channel beacon receiver for reception of IALA beacon DGPS corrections. R4 Control and Display unit The R4 Control and Display Unit is a variant of the well-known R4 AIS MKD, performing navigation functions. The traffic-light LEDs are used to continuously indicate the status of the RAIM calculations. Green light tells the OOW that the position accuracy is within the required value and red light that the accuracy is not within the defined limit. In combined DGPS/AIS configurations, the R4 Control and Display Unit will display and control Navigation data, in addition to the AIS information. The new Saab R4 GPS/DGPS products will of course be ideal to connect to existing or future AIS systems, ensuring that the ship operates in full compliance with all relevant regulations. It is a well- known fact that many existing GPS systems don’t provide correct information, in the required formats, as defined in the AIS standard. GPS information is becoming extremely vital for many systems onboard and hence critical to overall safety.