GPSMAP 640 Owner’s Manual 33
Marine Mode: Advanced Conguration
Marine Mode: Advanced
Use the Congure menu to congure general unit settings.
Use the Menu screen on various chart screens to congure chart-
specic information.
From the Home screen, touch Congure > System.
Simulator—turn Simulator Mode On or Off. Touch Setup to set
Simulator options.
Language—touch to set the on-screen language.
Beeper/Display—set beeper and display options.
Beeper—touch Beeper to set when the unit makes audible
sounds. The settings are Off, Alarms Only, and On (Key and
Alarms) (default).
Display—touch Display to open the display menu.
Backlight Slider—adjust the intensity of the backlight.
Color Mode—touch Color Mode to select Day Colors
or Night Colors, or touch Auto to allow the device to
automatically adjust the colors.
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Volume—adjust the volume levels.
Screenshot Capture—toggle the screenshot capture feature on
and off. With the screenshot capture on, touch and hold Home
on any screen to take a screenshot. The screenshot is saved to an
inserted SD card.
Audio Out
—set to High-Z for best sound quality if your stereo
has a high-impedance input. If you are experiencing audio
distortion, try toggling this setting between Low-Z and High-Z
to improve audio performance.
Calibrate Touch Screen
—touch the dots as they appear to
calibrate the touchscreen.
GPS—view GPS information and change GPS settings.
Skyview—view the GPS satellite constellation.
WAAS/EGNOS
—toggle WAAS (in North America) or
EGNOS (in Europe) on or off. WAAS/EGNOS can provide
more-accurate GPS position information; however, when using
WAAS/EGNOS, the device takes longer to acquire satellites.
Speed Filter—set the speed lter to On, Off, or Auto. The
speed lter averages the speed of your boat over a short period
of time for smoother speed values.
System Information
—view system information, restore factory
settings, view the event log, and save system information.
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