Garmin GPSMAP 640 Manual - Halaman 7

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Garmin GPSMAP 640 Manual

Weather Warnings and Weather Bulletins

When a marine weather warning or weather bulletin is issued, shading
indicates the area to which the warning or bulletin applies. To view
➊
information about the warning or bulletin, select the shaded area. The
cyan lines
on the chart indicate the boundaries of the warning or
➋
bulletin. Weather bulletins may consist of either weather watches or
weather advisories.
Color
Description
Red
Marine Warning (on water)
Tornado Warning (on land)
Yellow
Severe Storm Warning (land only)
Light Blue
Flash Flood Warning (land only)
Blue
Flood Warning (land only)
GPSMAP 640 XM WX Satellite Weather and XM Satellite Radio Supplement 

Forecast information

The Forecast screen shows weather conditions, including fronts, pressure
centers, sea surface pressure, and city forecasts.
Viewing Present Forecast information
From the Home screen, select Weather > Forecast.
Viewing Forecast information for another Time Period
1. From the Home screen, select Weather > Forecast.
2. Complete an action:
• Select Next Forecast to view the forecast weather for the next 12
hours, and select Next Forecast again to view forecasts for the
➊
next 24, 36, and 48 hours, in 12-hour increments.
• Select Previous Forecast to view the forecast weather for the
previous 12 hours, and select Previous Forecast again to view
forecasts for the previous 24, 36, and 48 hours, in 12-hour
increments.
➋
Viewing a Coastal Forecast or an Offshore Forecast
1. From the Home screen, select Weather > Forecast.
2. Pan the chart to an offshore location.
3. Select an offshore location.
The Coastal Forecast or offshore Forecast options appear when
forecast information is available.
4. Select Coastal Forecast or offshore Forecast.
Marine Mode: Using XM WX Weather and Audio
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