Geofence Alarm

Every 5 or 6 hours I get an alarm from the GlobalLink that

The installation has an armed geofence, but there is no GPS data coming in. Check GPS reception and connection, or disarm the geofence alarm on the VRM settings page at:

When I look at the RSSI signal from the GlobalLink there are no dropouts in the signal as the signal remains at a steady -70db. Any thoughts on this?

I have found that the position from GPS can wander about so I have set my geofence to be around 300m radius from the boats berthing position to avoid spurious geofence alarms if the radius was too small.

Thank you! Have increased the radius to a 1 mile radius, hopefully that works.