With a subscription to XM WX Satellite Weather, you have the confidence of knowing what weather lies ahead. XM Weather provides real-time, high-resolution animated weather data directly to your compatible aviation or marine device. View weather conditions across the continental U.S. and 100 miles into U.S. coastal waters, and zoom in on a particular region. Depending on your service plan, you can view 20 different types of graphical weather information, such as radar, satellite imagery, sea surface temperatures, wind shear and much more. This information is displayed in chart overlay form directly on your GPS device without the need for a PC connection.