User manual GARMIN GXM 30

[. . . ] XM Radio Smart Antenna GXM 30 owner's manual ® © Copyright 2005 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U. S. A. 913/397. 8200 or 800/800. 1020 Fax 913/397. 8282 Garmin (Europe) Ltd. [. . . ] Similar to Marine and Automotive units, the wind barbs indicate wind speed and direction. The wind streamline indicates wind direction with arrows. Wind Barbs Wind Streamline GXM 30 XM Radio Smart Antenna Owner's Manual 12 XM WEATHER FEATURES > SURFACE PRESSURE This feature displays pressure isobars and pressure centers. The isobars connect points of equal pressure. Pressure readings can help 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 that are packed closely together show a strong pressure gradient. Strong pressure gradients are associated with areas of stronger winds. Pressure units can be displayed in Millibars (mb), Inches of Mercury (in), and Hectopascals (hPa). Pressure Isobars Strong Pressure Gradient Surface Pressure 13 GXM 30 XM Radio Smart Antenna Owner's Manual XM WEATHER FEATURES > FRONTS Fronts The Fronts feature displays lines indicating the leading edge of an air mass. This feature also displays pressure centers. Pressure centers are represented by a large Red "L" for low pressure centers or a large Blue "H" for high pressure centers. Pressure centers represent an area where pressure is measured to be either the highest or lowest relative to the surrounding area. A Low Pressure Center is an area where the measured pressure is lowest relative to the surrounding area. Moving away from a Low Pressure Center in any horizontal direction results in increased pressure. Winds flow counterclockwise around Low Pressure Centers in North America. Similar to a Low Pressure Center, a High Pressure Center is an area where the measured pressure is highest relative to the surrounding area. Moving away from a High Pressure Center in any horizontal direction results in decreased pressure. Winds flow clockwise around Low Pressure Centers in North America. Cold Front Warm Front Stationary Front Occluded Front Trough GXM 30 XM Radio Smart Antenna Owner's Manual 14 XM WEATHER FEATURES > VISIBILITY Visibility Visibility is the forecast maximum horizontal distance that can be seen at the surface. Contour lines on the Visibility feature show the forecasted change in surface visibility. In the example below, visibility ranges from 1 miles to 4. 5 miles. Visibility Contour Lines This image displays NEXRAD Radar, Satellite Mosaic, and Visibility. Displaying multiple features may help to provide a clearer picture of the weather conditions in the area. 15 GXM 30 XM Radio Smart Antenna Owner's Manual XM WEATHER FEATURES > COUNTY WARNINGS County Warnings When the National Weather Service issues a weather warning for a county, the county is highlighted with the color corresponding to the warning. To view information about the warning, select the county with the map pointer. [. . . ] This information is provided "as is" and XM and Garmin disclaim any and all warranties, express and implied, with respect thereto or the transmission or reception thereof. XM and Garmin further do not warrant the accuracy, reliability, completeness or timeliness of the traffic and weather information disclosed on the Radio Service. In no event will XM and Garmin, their data suppliers, service providers, marketing/distribution, software or Internet partners or hardware manufacturers be liable to you or to any third party for any direct, indirect, incidental, consequential, special, exemplary or GXM 30 XM Radio Smart Antenna Owner's Manual punitive damages or lost profits resulting from use of or interruptions in the transmission or reception of the Services. LIMITS ON OUR RESPONSIBILITY a) DISCLAIMERS. [. . . ]