Raymarine Ray 90, Installation & Operation Instructions, Page: 72 / 108

10.4 GNSS (GPS) troubleshooting
Problems with the GNSS (GPS) and their possible causes and solutions are described below.
Before troubleshooting GNSS (GPS) problems, ensure
your product has the latest software, by checking the
Software Updates page on the Raymarine website
www.raymarine.com .
No fix
Possible causes Possible solutions
GNSS (GPS) switched off. Ensure your internal GNSS (GPS) receiver is switched on.
Geographic location or prevailing conditions preventing
satellite fix. Check periodically to see if a fix is obtained in better conditions or another geographic location.
GNSS (GPS) Antenna location. For optimum performance the antenna should be mounted above decks and have a clear, unobstructed view
of the sky, and not be in close proximity to any structural bulkheads or other electrical equipment or cables
which may cause interference.
No position data
Possible causes Possible solutions
Internal receiver is switched off. Ensure your external or internal receiver is switched on.
Wrong Network output selected. Ensure the correct network type and speed is selected in the Network output menu: Menu > Set-up >
Network output .
Poor / damaged / insecure cable / connection.
1. Check that the connectors are fully inserted into the unit and locked in position.
2. Check the cables and connectors for signs of damage or corrosion, replace if necessary.
3. Check the vessel’s battery voltage, the condition of the battery terminals and power supply cables, ensuring
connections are secure, clean and free from corrosion, replace if necessary.
4. With the product under load, using a multi-meter, check for high voltage drop across all connectors/fuses
etc, replace if necessary.
GPS data output
The Ray90 and Ray91 include an internal GPS receiver.
However, these products do NOT output GPS data to
external devices.
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