Why is nautical mile different?

Related questions

1. What is airspeed velocity?
2. What affects true airspeed?
3. How fast is hypersonic?
4. How is airspeed measured?
5. Does true airspeed increase with altitude?
6. Which is better vs1 or si1?
7. How do airplanes calculate speed?
8. Does wind affect Indicated Airspeed?
9. Is ground speed faster than airspeed?
10. How is airspeed calculated?

Tags

1. #speed
2. #charting
3. #miles
4. #equal
5. #measures
6. #circumference
7. #navigating
8. #earth
9. #minute
10. #distance
11. #based
12. #nautical
13. #latitude
14. #statute
15. #slightly
16. #measured