Garmin 520 Guía Del Usuario

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The unit uses an on-screen message system to alert you to unit 

operating characteristics. When a message appears, press 

 to 

acknowledge the message.
Accuracy Alarm—the GPS accuracy has fallen outside of 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—some part of the antenna wiring is 

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 35 Volts or 

less.

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 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.
Check XM Antenna*—internal problem with your GXM 31 

antenna. Contact Garmin Product Support.