Huh? Nautical miles are a fixed unit of measurement equivalent to 1852 meters today but originally defined as a minute of latitude. They are still commonly used for distances, e.g., range of a Boeing 777 as reported in Wikipedia. [1, 2] They are a logical unit to use for flight to the moon.

[1] https://en.wikipedia.org/wiki/Nautical_mile [2] https://en.wikipedia.org/wiki/Boeing_777#Specifications