It navigates primarily by GPS and high-accuracy inertial navigation. The upgrade includes, among other things, new intercom and new navigation and positioning systems. These vehicles incorporate systems such as braking, lane changing, collision prevention, navigation and mapping. The update was intended to ease console menu navigation. NMEA 0183 is supported by various navigation and mapping software. Field units were given maps that were only of use for aerial navigation. It focuses on improving productivity by reducing searching, scrolling, and navigation. Today there are hundreds of geosynchronous satellites providing remote sensing, navigation and communications. DAISY has wide international support with features for multimedia, navigation and synchronization. Prague was selected to host administration of the EU satellite navigation system Galileo. Accelerometers are used alongside gyroscopes in inertial navigation systems. AR can augment the effectiveness of navigation devices. There are sensors that assist in autonomous navigation. Station identification letters are shown on air navigation charts. This makes it useful in celestial navigation.