What is the best gps for motorcycles? boats. raymarine combo packages. is lowrance boat box bundle worth the money? how to use google maps for marine navigation; garmin marine gps system is just as popular as the garmin gps for cars? humminbird gps heading sensor is the really helpful device. what is the best gps for boats? small boat radar. Electronic navigation systems. gps (global positioning system) is based on satellite transmitters. it is accurate to 10 metres and available around the world as well as at different elevations. gps is vulnerable to jamming and other electronic interference, so a backup navigational system is recommended.. Navigation systems cutting-edge solutions for integrated navigation and retrofit military equipment such as a marine inertial navigation platform, based on a ring-laser gyro, or the advanced navigation data management center, which is the core of our integrated ranging from s...