Garmin GPSMAP 740/740s XM Supplement - Page 10

XM WX Satellite Weather and XM Satellite Radio Viewing Fishing Information The fishing screen shows present water temperature, present surface-pressure conditions, and fishing forecasts. From the Home screen, select Weather > Fishing. Surface Pressure Surface-pressure information appears using pressure isobars and pressure centers. Isobars connect points of equal pressure. Pressure readings can help to determine weather and wind conditions in an area. High-pressure areas are generally associated with fair weather. Low-pressure areas are generally associated with clouds and the chance of precipitation. Isobars packed closely together show a strong pressure gradient. Strong pressure gradients are associated with areas of stronger winds. Pressure units are shown in millibars (mb), inches of Mercury (inHg), and hectopascals (hPa). Water Temperature Data Colored shading indicates the surface temperature of the water. Water temperature legend Isobars Water temperature shading Forecasting Fish Location You can show areas that contain optimal weather conditions for specific species of fish. 1. From the Home screen, select Weather > Fishing > Menu > Fish Species. 2. Select a species of fish. Shaded areas indicate optimal fishing areas. 3. Repeat step 2 to show areas with optimal weather conditions for additional species of fish.  700 Series XM WX Satellite Weather® and XM® Satellite Radio Supplement