This message is automatically generated as a courtesy to remind you that it may be time to update your map. Tap OK and you can continue to use your navigation device as you normally would.
Currently there is no map update available for these models. However, there is a firmware update available for your nav-u unit. Although the firmware update does not provide additional map data, it may improve the route quality of your map in certain situations. The firmware update is available from the Sony® Support Web Site.