Originally Posted by
hans brinker
I have a company iPad with GPS, Jepps app shows my position perfectly on the taxi diagram, great for SA, but my company specifically prohibits me from using that feature, because the GPS in an iPad is not approved by the FAA for navigation, and on the NEOs it will sometimes suddenly lose the plot. Me crossing the wrong runway because I am trusting a not proven device does not make things safer.
Apples and oranges. Your iPad GPS is not certified, therefore
your position is not precisely depicted on your iPad. But the GPS used by ADS-B in the aircraft around you are WAAS certified and accurate typically to 3 ft. horizontally and 5 ft. vertically. (The certification standard in less precise.) So the positions of the surrounding aircraft depicted on your iPad are more accurate than
your position depicted on your iPad.
Better than controllers being completely blind in the fog.