flymand

Yes agreed. We should be using ground speed knots here.

I replied above, but knots have a similar problem when flying (indicated air speed).

Sure, but it is more relevant to describe aerodynamic properties of an aircraft. Knots can have a similar problem (look up indicated airspeed). But I guess you’re right, we should be using ground speed knots in this instance.

If you ask a pilot, ground speed only really is important for calculating ETA. Everything relevant to flying is a relative number since atmospheric density is fluid.

If you want to get technical, we should be using Mach number or knots since that’s what the world uses for aviation. That being said, the majority of the article’s consumers aren’t technical with this topic :P