The metric system is the only way. The Russians are way ahead of us. Miles and knots are from the past. As are gallons, stones, yards, feet and inches.
^this^
The old Imperial system is on its last gasps, as it should be. Aviation is the last stubborn area where it's hanging on and I hope that it transitions as quickly as possible to full metric.
Though I would actually like to see Planck Units used, they make even more sense than Metric does.