Global positioning system (GPS)
A global positioning system (GPS) must be connected to the CS90. When a global positioning system (GPS) connected to the CS90, the vessel’s current geographical position can be presented in the user interface. It will also provide latitude and longitude information for the cursor and marker(s). In addition to navigational data, the global positioning system (GPS) can also be used to provide speed information.
Note
Most global positioning system (GPS) can provide course information, but this data is generally too inconsistent to provide a stable CS90 presentation.
The global positioning system (GPS) interface requirements are:
•  Serial line: Standard NMEA 0183 datagram formats
•  Ethernet (LAN) line: Standard NMEA 0183 datagram formats