Owner's Manual
GPSMAP 400/500 Series Owner’s Manual 71
Appendix
50/200 kHz (dual frequency and 1 kW), 80/200 kHz
(dual beam)
2,500 ft. (762 m) (1 kW), 1,500 ft. (457 m) (dual frequency),
900 ft (274 m) (dual beam). Depth capacity is dependent on
water salinity, bottom type, and other water conditions.
Alarms and Messages
The unit uses an on-screen message system to alert you to unit
operating characteristics. When a message appears, press to
acknowledge the message.
—the GPS accuracy has fallen outside of the user-
set value.
—shows the MMSI (Maritime Mobile
Service Identity) of the dangerous target.
—the alarm clock has sounded.
—you have drifted out of the specied distance
range.
—a part of the antenna wiring is crimped,
broken, or contacting the chassis.
—you arrived at the destination
waypoint. You can when this message appears.
—battery voltage has fallen below the value entered
in the Battery Alarm setup.
—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.
—the boat is not
moving fast enough for the speed wheel to provide a valid speed.
—error reading card; remove and reinsert.
Contact your dealer or Garmin Product Support if the problem
persists.
—the
voltage value in the Battery Alarm setup is higher than the unit can
read.
—voltage value in the Battery Alarm setup is lower than the
voltage where the unit automatically turns off.
—data on the data card is not unlocked for the
unit. Contact your dealer or Garmin Product Support.
—error reading card;
remove and reinsert. Contact your dealer or Garmin Product Support
if the problem persists.