GPSMAP 640 Owner’s Manual 39
Marine Mode: Advanced Conguration
Channel Entry—enter a channel using the on-screen keyboard.
Category—select the category of channels that are displayed in the
Channel Guide.
Save Preset—save the current XM channel in the Presets list.
Touch Delete Preset to remove the current channel from the list.
“Presets” is displayed as a category in the category list.
From the Navigation chart, touch Menu.
Waypoint and Tracks
—access shortcuts to waypoint and track
information. For more information on waypoints and tracks,
see page 22.
Tracks
—toggle tracks on or off.
Waypoints List—view a list of all saved waypoints.
New Waypoint—mark a new waypoint.
Active Track
—change active track options, clear the active
track, follow the active track, or save the active track.
Saved Tracks
—view the saved tracks list.
Tracks Display
—show or hide tracks on the chart according to
color.
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Waypoints Display—select whether to show labels for
waypoints of a particular symbol with the waypoint name,
a comment, or a symbol only. You can also select to hide a
waypoint on charts by symbol. This allows the waypoints on
the map to be quickly limited to those most relevant to your
current activity.
Other Vessels
—access AIS and DSC shortcuts, as well as chart-
specic AIS display settings.
DSC List—view the DSC list. See page 31.
DSC Trails
—select the number of hours to show tracked
vessels on the Navigation chart. For example, if you select
4 Hours, all trail points less than four hours old for tracked
vessels are displayed. The Navigation chart displays a black line
indicating the path of the vessel, a black dot for each reported
position, and a Blue Flag symbol indicating the last reported
position. Touch Off to turn trails off for all vessels.
AIS List—view the AIS list. See page 31.
AIS Alarm
—set the AIS alarm. See page 37.
AIS Display Setup
—congure chart-specic AIS display
settings.
AIS Display Range
—specify the distance from your boat
on the navigation chart where AIS icons are visible.
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