Geographical mile longitude at the equator is thus exactly 60 geographical miles. It was closely related to the nautical mile, which was originally determined as 1 minute of arc along a great circle of the Earth, but is nowadays defined as exactly 1852 metres. The US National Institute of Standards and Technology (NIST) notes that: "The international nautical mile of 1 852 meters (6 076.115 49...feet) was adopted effective July 1, 1954, for use in the United States. The value formerly used in the United States was 6 080.20 feet = 1 nautical (geographical or sea) mile." (6080.2 feet is 1853.24496 meters.)
Ethiopian units of measurement Ethiopian units of measurement A number of different units of measurement have been used in Ethiopia. The values of the most of these units are not well defined. In 1963, Ethiopia adopted the metric system. These units have also been referred to as Abyssinian units of measurements. Different units were used to measure length. Values provided below are approximations only as these units were often not well-defined. 1 pic = 0.686 metres 1 farsang = 5070m 1 berri = 1/3 farsang (approx. 3 pics) A number of units were used to measure mass. One rottolo is approximately equal to 0.311