65Section 3GPS NavigationGPS OverviewThe GPS portion of your unit provides a method for navigation usinga system of overhead satellites to determine your location on the earth,combined with a mapping database. Other built-in features allow youto record waypoints (landmarks and destination points), find destinationpoints, (cities, points of interest, waypoints, etc.), chart your progress, andmonitor details such as speed, direction, and elapsed time.Each time you turn on the unit, it must determine its location. The firsttime you use your unit, this may take from five to fifteen minutes. Afterfirst use, the unit should determine your location in less than one minute.While the unit is collecting satellite information, a “searching for satellites”window will appear in the lower left corner of the display.When your location has been determined, the Map Navigator Page willstate “Ready To Navigate” and display Cardinal letters (North, South, East,West) and your current location will be shown on the map above it.If there are not enough satellites in view to determine its location, theunit will display a “Poor Satellite Reception” message with four options. Abrief explanation for each option will appear when it is highlighted.Use the ARROW keys to highlight the logical option and then pressthe ENTER key to activate it.If the time displayed in the time field on the Map Page is not correct,you will need to set the time for your current location. Whenever theunit is operating with GPS On, a Battery Life warning will appear. PressENTER to acknowledge.The GPS Features PagesGPS Tab - Features PagePoor Satellite Reception Message withList of Options and InstructionsBattery Life Warning MessageSearching for Satellites WindowSection 4