\begin{definition}[Definition:Nautical Mile]
The '''nautical mile''' is a unit of length which is used for air and sea navigation.
It was originally defined as the length measured along Earth's surface of one minute of latitude along a meridian.
It is now defined as exactly $1852$ metres.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''nautical mile'''
}}
{{eqn | r = 1852
      | c = metres (by definition)
}}
{{eqn | r = 10
      | c = cables
}}
{{eqn | o = \approx
      | r = 6076
      | c = feet
}}
{{eqn | o = \approx
      | r = 1 \cdotp 151
      | c = (international) mile
}}
{{eqn | o = \approx
      | r = 0 \cdotp 999 \, 363
      | c = admiralty (UK nautical) mile
}}
{{end-eqn}}
\end{definition}