Using XM WX Weather ....................................................126Viewing XM WX Weather..................................................... 126Setting XM WX Weather Options ....................................... 127Using the Weather Tab ........................................................ 130Finding Weather Information ............................................. 133Setting up and Using Sonar ...........................................135Showing Sonar on the Map Page ....................................... 135Using the Sonar Page ......................................................... 136Setting Up the Sonar Page ................................................. 140Understanding Sonar .......................................................... 143Viewing the Sonar Temperature Tab .................................. 146TIS (TRAFFIC INFORMATION SERVICE) .......................147TIS Limitations ..................................................................... 148TIS Symbology .................................................................... 150Traffic Ground Track .......................................................... 151Traffic Warning Window...................................................... 151Map Page .............................................................................. 152TIS Operational Procedures ............................................... 153VHF Comm .......................................................................154Appendix ..........................................................................155Specifications ...................................................................... 155Care Information ................................................................. 156Optional Accessories .......................................................... 157Installation Information ....................................................... 158Learning About GPS ........................................................... 163LORAN TD Setup ................................................................. 165Map Datums and Location Formats .................................. 167Digital Selective Calling (DSC) ........................................... 168Jeppesen Database Information ........................................ 170Messages ............................................................................. 171Data Field Options ............................................................... 174License Agreement and Warranty ..................................... 176Product Registration ........................................................... 176Index .................................................................................181iv GPSMAP 496 Owner’s ManualINTRODUCTION > TABLE OF CONTENTS