Definition:Admiralty Mile

Definition
The admiralty mile is an obsolete British unit of length which was used for air and sea navigation.

It was defined as the average length measured along Earth's surface of one minute of latitude along a meridian, rounded to $4$ significant figures.

Also known as
Older texts refer to the admiralty mile as a nautical mile, but this is now technically a different measurement, some $0 \cdotp 06 \%$ smaller.

Also see

 * Definition:Mile:
 * Definition:International Mile
 * Definition:Nautical Mile