Without paywall: https://archive.is/QW9WL

Biercuk said. Over an 80-mile test window, a sensor on the tip of the plane’s wing resulted in an average position estimate within about 620 feet of the true position, and the margin of error didn’t increase with the duration of the flight, he said. The performance was more than 10 times better than the inertial navigation system.

That is a fascinating technique. I wonder if the accuracy will increase with further development.

Man, this just leaves out all the other systems they use for planes and ships to supplement and act as a redundancy for GPS.

I’m not saying that this is t a good idea. But the headline is bunk.