Garmin GPSMAP 420, Owner'S Manual

Page: 63 / 72

GPSMAP 400/500 Series Owner’s Manual 5
Appendix
Entering (Leaving) target water temperature —the target water
temperature is 2°F (1.1°C) above or below the temperature specified
by the Water Temperature Alarm. These messages appear when you
enter or leave that zone.
Entering Safe Region —the boat is approaching a safe region as
defined by your configuration settings.
Entering Unsafe Region
—the boat is approaching an unsafe region
as defined by your configuration settings.
fish alarm —a beep sounds (if enabled) when a fish is detected.
This alarm does not show a message banner.
invalid MMSi —enter a valid MMSI.
Lost Satellite Reception
—the unit has lost satellite signals. Check
antenna connections or try moving to a location with a clear view of
the sky.
NMEa depth is below Transducer —you must enter an
appropriate Keel Offset for the transducer ( page 42 ).
No waypoints/Routes/Tracks/User waypoints found—
attempted
to transfer user data from an SD card that does not contain the
specified type of data. Make sure there is data to transfer on the SD
card.
Off Course alarm —you are off course the distance set in the “Off
Course” alarm.
Route already Exists —you entered a route name that already exists
in memory. Modify the route name or delete the previous route
name.
Route full —you attempted to add more than 250 points to a route.
Reduce the number of points or create a second route.
Route Truncated —an uploaded route from another device has more
than 250 waypoints and was truncated to fit.
Route waypoint Memory full —no additional route waypoints can
be saved.
Shallow water alarm
—the Shallow Water Alarm depth has been
reached.
Sonar Service incompatible —the external sonar device you are
connected to needs a software update.
Sonar Timeout —there is an internal problem with the unit. Contact
your dealer or Garmin Product Support to have the unit serviced.
Sonar Service Lost —the external sonar device you were connected
to has either been disconnected or the unit has lost communication
with the sonar device for some other reason.