Speed log
In order to operate correctly, the CS90 requires input from a speed log. A speed log is normally not a part of the CS90 delivery. When a speed log is connected to the CS90, the vessel’s current speed can be presented in the user interface.
Note
Without the input from a speed log, the CS90 will neither be able to present correct navigational information, nor compensate for vessel movements. This lack of compensation will prevent the CS90 from providing correct echo information.
In most cases a suitable sensor is already installed on the vessel. A global positioning system (GPS) with a compatible output format can also be used.
The speed log interface requirements are:
•  Serial line: Standard NMEA 0183 datagram formats
•  Ethernet (LAN) line: Standard NMEA 0183 datagram formats