Garmin GPSMAP 640 Manual - Page 13

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Also for Garmin GPSMAP 640: Installation Instructions (2 pages), Quick Reference Manual (2 pages), Declaration Of Conformity (6 pages), (Spanish) Guía De Consulta Rápida (2 pages), (Italian) Quick Reference Manual (2 pages)

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Garmin GPSMAP 640 Manual

about the Weather Overlay

The weather overlay superimposes weather and weather-related
information on the Navigation chart, the Fishing chart, and the
Perspective 3D chart. The Navigation chart and the Fishing chart can
show WX radar, cloud cover, lightning, WX buoys, county warnings, and
hurricane warnings. The Perspective 3D chart can show WX radar.
Weather overlay settings configured for use on one chart are not applied
to another chart. The weather overlay settings for each chart must be
configured separately.
Note: Fishing charts are available if you use a BlueChart
SD card, a BlueChart g2 SD card, or if your built-in map supports Fishing
charts.
Turning On the Weather Overlay on a Chart
1. From the Home screen, select Charts.
2. Select Navigation Chart or Fishing Chart.
3. Select Menu.
4. Select > Navigation Chart Setup or Fishing Chart Setup.
5. Select Weather > Weather > on.
GPSMAP 640 XM WX Satellite Weather and XM Satellite Radio Supplement 
Showing WX radar Precipitation Data on a Chart
WX Radar shows very light rain and snow up to strong thunderstorms in
varying shades and colors.
Before you can show WX Radar information on a chart, you must turn on
the weather overlay
1. From the Home screen, select Charts.
2. Select Navigation Chart or Fishing Chart.
3. Select Menu.
4. Select Navigation Chart Setup or Fishing Chart Setup.
g2 Vision
®
®
5. Select Weather > NeXRAD > on.
Showing Weather Buoys on a Chart
Before you can show weather buoys on a chart, you must turn on the
weather overlay
1. From the Home screen, select Charts.
2. Select Navigation Chart or Fishing Chart.
3. Select Menu.
4. Select Navigation Chart Setup or Fishing Chart Setup
5. Select Weather > WX Buoys > on.
Showing a Weather Legend on a Chart
Before you can show a weather legend on a chart, you must turn on the
weather overlay
1. From the Home screen, select Charts.
2. Select Navigation Chart or Fishing Chart.
Marine Mode: Using XM WX Weather and Audio
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