Restart Gps - Raymarine Raynav 300 GPS Plotter Owner's Handbook Manual

Chapter 4: Setting Up the GPS Plotter 4-15
is using RTCM data received via NMEA, this information is not available
and the item shows dashes, one per character.
The received Signal Strength and SNR are interrelated. SNR provides a
measure of the quality of the received signal and is dependent upon signal
strength.
Differential Age
Differential Age indicates the time elapsed since the last differential
beacon correction update.

Restart GPS

This soft key enables re-acquisition of a GPS position fix. The GPS
receiver performs a cold start.