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I recommend combining the information on the 'Information > Map Update' and 'Information > Others > Navigation Version' pages into one page: Map/System Version. Not only will this make it easier to find the relevant information, this consolidation saves time by merging two similar information screens into one clearly-labeled page. Then technicians and drivers will have a central screen to go to for updating map data and verifying whether all current software-based ITBs have been installed.
Also, I recommend changing the name of the 'DVD Update' nav button to Install DVD Map Update which is more clear (because one isn't updating a DVD when selecting that button, but rather installing updated maps from a DVD).