Agreed. When I learnt about nautical miles and knots (nm/h) which is both used by aviation and sailors, I feel we should be using nautical miles for all travel

Agreed. When I learnt about nautical miles and knots (nm/h) which is both used by aviation and sailors, I feel we should be using nautical miles for all travel distance. Miles really don’t have much meaning. If someone goes at 60 nautical miles per hour (111.112 km/h), for 360 hours (15 days), they cover the circumference of the planet around the equator. I.e go around the planet.