Our company has sparse database loading as we fly to a wide variety of unusual and irregular destinations. It's not unusual to find your destination is not loaded at all, and doesn't 'exist' in the map database. Having tried to load the route before departure, one would then enter the Supplementary database and insert airfield position, then make up what approach you can for whatever runway you will use. That is all you need- it is a navigation convenience only- you get in to an airfield with standard instrument/visual techniques! Even if you discover inflight the destination is not in the database, rather than permanent preflight loading into the Supplementary database, you can just load a temporary position. It's standard aviation navigation techniques that count, not computer loading! Though some young pilots can be a bit lost without a computer to play with!