Appendix

Alarms and Messages

The unit uses an on-screen message system to alert you to unit operating characteristics. When a message appears, press MENU to acknowledge the message.

Accuracy Alarm—the GPS accuracy has fallen outside of the user- set value.

AIS: Dangerous Target—shows the MMSI (Maritime Mobile Service Identity) of the dangerous target.

Alarm Clock—the alarm clock has sounded.

Anchor Drag Alarm—you have drifted out of the specified distance range.

Antenna Input is Shorted—a part of the antenna wiring is crimped, broken, or contacting the chassis.

Arriving At [Waypoint Name]—you arrived at the destination waypoint. You can Stop Navigation when this message appears.

Battery Alarm—battery voltage has fallen below the value entered in the Battery Alarm setup.

Battery Voltage Is Too High—too much input voltage—the unit shuts off in 10 seconds. Decrease the input voltage to the maximum voltage allowed (or less) for your chartplotter.

Boat Is Not Moving Fast Enough to Calibrate—the boat is not moving fast enough for the speed wheel to provide a valid speed.

Can’t Read User Card—error reading card; remove and reinsert. Contact your dealer or Garmin Product Support if the problem persists.

Can’t Read Voltages That High, Limited To Top Of Range—the voltage value in the Battery Alarm setup is higher than the unit can read.

Can’t Read Voltages That Low, Limited To Bottom Of Range— voltage value in the Battery Alarm setup is lower than the voltage where the unit automatically turns off.

Can’t Unlock Maps—data on the data card is not unlocked for the unit. Contact your dealer or Garmin Product Support.

Can’t Write User Card, Card May Be Full—error reading card; remove and reinsert. Contact your dealer or Garmin Product Support if the problem persists.

Can’t Write User Card, Card Is Read-Only—the SD card in your unit contains data copy protection.

Card Needed—Your unit needs to have an SD card inserted into the SD card slot in order to perform the function you requested.

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GPSMAP 400/500 Series Owner’s Manual