Garmin GPSMAP 740/740s XM Supplement - Page 9

XM WX Satellite Weather and XM Satellite Radio Viewing Sea Conditions The sea-conditions screen shows information about surface conditions, including winds, wave height, wave period, and wave direction. From the Home screen, select Weather > Sea Conditions. Surface Winds Surface winds appear on the sea-conditions screen using wind barbs that indicate the direction from which the wind is blowing. A wind barb is a circle with a tail. The flag attached to the tail of the wind barb indicates the wind speed. Wind Barb Wind Speed Calm Wind Direction Wind Barb Wind Speed 15 knots Wind Direction 5 knots 20 knots 10 knots 50 knots Wave Height, Wave Period, and Wave Direction Wave heights for an area appear as variations in color. Different colors indicate different wave heights, as shown in the legend on the left of the screen. Wave height lines indicate areas that have the same wave height. The wave period indicates the time (in seconds) between successive waves. Wave directions appear on the map using red arrows. The direction of each arrow pointer indicates the direction in which a wave is moving. Wave height legend Wave height shading Wave height lines Wave direction arrows 700 Series XM WX Satellite Weather® and XM® Satellite Radio Supplement