The latest naval GPS solution (Navfix) will be installed across the majority of the Royal Navy’s surface and sub- surface platforms to provide the primary source for positioning and timing information. The system uses a Rockwell Collins MPE-S Type II Receiver which incorporates a Selective Availability Anti-Spoofing Module (SAASM) to provide robust navigation warfare capabilities. The system has been designed to be agnostic to the GPS receiver so that any ICD-GPS-153 compatible receiver could be used.