Miles (land, statute, imperial, whatever) = 1.609 mtr
Nautical miles = 1.848 mtr

So there is a big difference between land miles and nautical miles

Roman miles etc are yet different again. That is why the distance of a km was invented, to make an end to the confusion as well as to end 12 inches in a foot, 3 feet in a yard and ??? yard in a ??? mile

Wouter