XM WX Satellite Weather and Cellular Weather

Surface Winds

Surface wind vectors appear on the Sea Conditions chart using wind barbs that indicate the direction from which the wind is blowing. A wind barb is a circle with a tail. The line or flag attached to the tail of the wind barb indicates the wind speed. A short line represents 5 knots, a long line represents 10 knots, and triangle represents 50 knots.

Wind Barb

Wind Speed Wind Direction

Wind Barb Wind Speed Wind Direction

 

Calm

20 knots

 

5 knots

50 knots

 

10 knots

65 knots

 

15 knots

 

Wave Height, Wave Period, and Wave Direction

Wave heights for an area appear as variations in color. Different colors indicate different wave heights ➊, as shown in the legend ➋ on the left of the screen.

➋

➊

➌

➍

The wave period indicates the time (in seconds) between successive waves. Wave period lines ➌ indicate areas that have the same wave period.

Wave directions appear on the chart using red arrows ➍. The direction of each arrow pointer indicates the direction in which a wave is moving.

Viewing Forecast Sea Conditions Information for Another Time Period

NOTE: This feature is available only if you are receiving XM WX Satellite Weather data. It is not available if you are receiving cellular weather data.

1.From the Home screen, select Weather > Sea Conditions.

2.Complete an action:

•To view forecasted sea conditions for the next 12 hours, select Next Forecast, and to view forecasts up to 48 hours, in 12-hour increments, select Next Forecast again.

•To view the forecasted sea conditions for the previous 12 hours, select Previous Forecast, and to view previous forecasts, up to 48 hours ago, in 12-hour increments, select Previous Forecast again.

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GPSMAP 4000/5000/6000/7000 Series Weather and XM Satellite Radio Supplement