36 GPSMAP 640 Owner’s Manual
Marine Mode: Advanced Conguration
You can congure the GPSMAP 640 to alert you when certain
events occur.
Setting Navigation Alarms
From the Home screen, touch Congure > Alarms > Navigation.
Arrival
—sets an alarm to sound when you arrive at a
predetermined point.
Type
—set the alarm to sound either at the Destination Only
or at the Destination and Turns (when navigating a route with
turns).
Activation
—set the criteria for the alarm. The Distance setting
sounds the alarm when you are a specied distance from the
point. The Time setting sounds the alarm when you are a
specied time from the point.
Change Distance/Change Time
—specify the distance or time
from the point at which the alarm will sound.
Anchor Drag
—set an alarm to sound when you drift a specied
distance from your current location.
Off Course
—set an alarm to sound when you steer a specied
distance from your current course.
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Setting System Alarms
From the Home screen, touch Congure > Alarms > System.
Clock—set an alarm using the system (GPS) clock. The unit must
be on for the clock alarm to work.
GPS Accuracy
—set an alarm to sound when the GPS location
accuracy falls outside the specied value.
Setting Sonar Alarms
From the Home screen, touch Congure > Alarms > Sonar.
NOTE:
You must connect an optional sonar module and a
transducer using NMEA 0183 to receive sonar information.
Shallow Water/Deep Water—set an alarm to sound when the
depth is less than or greater than the specied value.
Water Temp
—set an alarm to sound when the transducer or
temperature sensor reports a temperature that is 2°F (1.1°C) above
or below the specied temperature.
Setting Weather Alarms
NOTE: You must have a subscription to XM WX
™
Weather and a
GXM 40 antenna connected to view weather information. See
page 47 for more information.
From the Home screen, touch Congure > Alarms > Weather.
