Even the greatest GPS receiver or flight management system in the world isn’t worth much without an internal IFR database. Chock full of the necessary fixes, approaches, routes, departures, arrivals and all the other coded information that allows us to fly from point A to B and on to point C with the press of a few buttons, the IFR database transformed how pilots fly. It’s safe to assume that Capt. Elrey Jeppesen never could have imagined that the aeronautical chart company he founded in 1934 would go on to pioneer IFR database technology, but that’s exactly what happened in the early 1970s with the introduction of Jeppesen NavData for the then-new flight management systems being installed in Boeing airliners. Today, we take the IFR nav database almost for granted — unless it’s expired, that is. We have Capt. Jepp to thank for that, as he laid the decades’ worth of groundwork needed to make Jeppesen NavData a reality.