nüvi 1490TV Owner’s ManualAppendixnüMaps Lifetime™For a one-time payment, you canreceive up to four map updates eachyear for the life of your unit. Formore information, go to www.garmin.com.Additional MapsYou can purchase additional mapsfor your nüvi. To see a list of mapsthat are compatible with your nüvi,go to your nüvi product page on theGarmin Web site (www.garmin.com), and click the Maps tab.About GPS SatelliteSignalsYour nüvi must acquire GPS(Global Positioning System) satellitesignals in order to navigate. If youare indoors, near tall buildings ortrees, or in a parking garage, yournüvi may not acquire satellites. Gooutside to an area free from tallobstructions to use your nüvi.When your nüvi has acquiredsatellite signals, the signal strengthbars on the Main menu are green. When it loses satellite signals,the bars turn red or clear .For more information about GPS, goto www.garmin.com/aboutGPS.Extras and OptionalAccessoriesFor more information about optionalaccessories, go to http://buy.garmin.com or www.garmin.com/extras, orcontact your Garmin dealer.Custom Points of InterestUse the POI Loader to load custompoints of interest (POIs) onto yournüvi. POI databases are availablefrom various companies on theInternet. Some custom databases