Specifications

Tritech International Ltd SeaKing System Options OM
Issue 3 TIL – Eng – Spec – 040 Page 34 of 44
GPS Display Panel
The following display will appear in this Panel on 'SONV3' startup when there are no serial
messages received from a GPS device;
With an active GPS input, the display Panel will change to display the specifics of the message.
For example, receipt of any of the NMEA 0183 messages (GGA, GLL or RMC) will display the
Co-ordinate information in the display area, as follows:
Versions up to V1.50
Versions later than V1.50 *
* These values are converted from the GPS Latitude
and Longitude outputs.
Click on the spanner icon to configure the GPS input type. The following display menu will appear
in the GPS display box.
Versions up to V1.50
Versions later than V1.50 *
* A 'lat/lon' check-box has been added in V1.53 which will
toggle the displayed position between Lat/Lon and E/N.
The ‘Cal’ flag should be left unchecked under normal operating conditions. This feature can be
used when the GPS receiver is sited in a stationary position and will calculate the receiver’s
position by averaging all updates since the time when the flag was checked.
The button to the immediate right of the ‘Cal’ flag changes the GPS input type setting. Each click of
this button will select a new type of GPS input message. Available messages are;
 OSGB input
 UTM -1 ..... UTM -60 input
 NMEA 0183 GGA command input
 NMEA 0183 GLL command input
 NMEA 0183 RMC command input

Additionally, SONV3 V1.54
will accept the NMEA 0183 "VTG" message from a GPS receiver. This
will be received through the same COM port that is configured to accept the "GGA" or "GLL"
message.
The "VTG' message will provide the Course over Ground (degrees) and Speed over Ground (km/h)
data which is displayed below the position information on the Gps panel.