TonyWilliams wrote:UnFortunately, the world uses the english measuring system for many other things in flying (altitudes are in feet, except Russia and China, speeds are in knots/mach number).
Fixed that for you. It's lunacy that everything, everywhere, doesn't use the far simpler, far more common metric system.
It would be nice to have a worldwide standard, and suspect that it will be metric, but I disagree with your simpler comments.
Since we use both systems around the world in aviation, there are some things that are better suited to the english system, IMHO. Altimeters (air pressure) measurements presented in english inches have a much higher resolution. The difference between 29.92 inches and 29.93 inches of mercury is 10 feet in altitude. The difference between 1013 millibars (hectopascals) and 1014 is much greater.
Distances in nautical miles, or statue miles, or kilometers, I honestly don't care, EXCEPT, the huge cost to convert for no gain whatsoever.