Garmin GMI 20 Marine Instrument Quick Start Manual - Page 18

Alarms and Messages Battery Voltage-alarm - the battery voltage is at or below the specified value. Boat is not Moving Fast Enough to Calibrate-water speed calibration - the boat is moving too slow to calibrate. Connection with NMEA 2000 device lost-the GMI 10 has lost connection with a NMEA 2000 device. Deep Water-alarm - the boat has entered water deeper than the specified depth. Entering Target Surface Temperature­-the water temperature is inside the user-defined target temperature zone. Leaving Target Surface Temperature­-the water temperature is outside the user-defined target temperature zone. Lost Satellite Reception-a connected GPS antenna has lost satellite reception. NMEA Depth Is Below Transducer-the NMEA depth input is using the DBT sentence which does not include keel offset. 18 GMI 10 Quick Start Manual