Garmin 640 Guida Utente

Marine Mode: Advanced Configuration

You can configure the GPSMAP 640 to alert you when certain 

events occur.

From the Home screen, touch 

 > 

 > 

.

arrival—sets an alarm to sound when you arrive at a 

predetermined point.

type—set the alarm to sound either at the 

 

or at the 

(when navigating a route with 

turns).
activation—set the criteria for the alarm. The 

 setting 

sounds the alarm when you are a specified distance from the 

point. The 

setting sounds the alarm when you are a 

specified 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 specified 

distance from your current location.
off Course—set an alarm to sound when you steer a specified 

distance from your current course.

From the Home screen, touch 

 > 

 > 

.

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 specified value. 

From the Home screen, touch 

 > 

 > 

.

  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 specified value. 
Water temp—set an alarm to sound when the transducer reports 

a temperature that is 2°F (1.1°C) above or below the specified 

temperature.

  Note: You must have a subscription to XM WX

™

 Weather and a 

GXM 40 antenna connected to view weather information. See 

for more information.

From the Home screen, touch 

 > 

 > 

.