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
Calm
5 knots
10 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
in the legend
on the left of the screen.
➋
➋
➊
The wave period indicates the time (in seconds) between successive waves. Wave period lines
have the same wave period.
Wave directions appear on the chart using red arrows
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.
6
Wind Direction
➍
GPSMAP 4000/5000/6000/7000 Series Weather and XM Satellite Radio Supplement
Wind Barb Wind Speed
. The direction of each arrow pointer indicates the direction
Wind Direction
20 knots
50 knots
65 knots
, as shown
➊
➌
➍
indicate areas that
➌
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