GPSMAP 640 Owner’s Manual 43
Marine Mode: Advanced Conguration
Land POIs—toggle Points of Interest (POI) icons shown on
land (this option is only available when using a BlueChart
g2 Vision SD card).
Light Sectors—adjust the drawing of light sectors on the
map.
Chart Borders—(GPSMAP 640) toggle the preloaded
BlueChart g2 chart borders on or off.
Understanding How Wind VMG and Waypoint
VMG Are Displayed in the Data Bars
The chartplotter automatically switches between displaying Wind
Velocity Made Good (VMG) and Waypoint VMG in the data bars.
Waypoint VMG is displayed under the following conditions:
The Route Leg data bar displays Waypoint VMG when you are
navigating a route or an automatic guidance line.
The Sailing data bar displays Waypoint VMG when you are
navigating a route or an automatic guidance line, and you turn
the Route Leg data bar off.
Wind VMG is displayed under the following conditions:
The Sailing data bar displays Wind VMG when you are not
navigating a route or an automatic guidance line.
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The Sailing data bar displays Wind VMG when the Route Leg
data bar is on and you are navigating a route.
Mariner’s Eye 3D Options
From the Perspective 3D screen or the Mariner’s Eye 3D screen,
touch Menu.
Waypoint and Tracks
—provides access to waypoint and track
information shortcuts, as on the Navigation chart. See page 39.
Other Vessels
—provide access to AIS and DSC shortcuts, as well
as chart-specic AIS display settings, as on the Navigation chart.
See page 39.
Weather Radar—toggle the NEXRAD weather overlay on or off.
This option is only available when connected to a Garmin GXM
40 XM antenna device. See page 47 for more information on
interpreting weather features.
Data Bars—control how charting numbers appear on the screen,
as on the Navigation chart. See page 40. You can also turn the
compass tape on or off (see page 41).
Chart Appearance
—customize the appearance of the Perspective
3D or Mariner’s Eye 3D screen.
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