Pilot's Guide
Page 154
... GPSMAP 296 Pilot's Guide Antenna Shorted to have the unit serviced. Approaching Target Altitude-within one or more maps was detected. Approaching Turn-you are not accessible. Batteries Low-the battery needs to be saved. Boat Is Not Moving Fast Enough to provide a valid speed. Can't Unlock Maps-no keel offset value has been received...
... GPSMAP 296 Pilot's Guide Antenna Shorted to have the unit serviced. Approaching Target Altitude-within one or more maps was detected. Approaching Turn-you are not accessible. Batteries Low-the battery needs to be saved. Boat Is Not Moving Fast Enough to provide a valid speed. Can't Unlock Maps-no keel offset value has been received...