Convert chain to nautical mile (international)
Please provide values below to convert chain [ch] to nautical mile (international) [NM], or Convert nautical mile (international) to chain.
How to Convert Chain to Nautical Mile (International)
1 ch = 0.0108622030237581 NM
Example: convert 15 ch to NM:
15 ch = 15 × 0.0108622030237581 NM = 0.162933045356372 NM
Chain to Nautical Mile (International) Conversion Table
| chain | nautical mile (international) |
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Chain
A chain is a unit of length equal to 66 feet, or 22 yards.
History/Origin
The chain was developed by English surveyor Edmund Gunter in the early 17th century. It was designed to be a convenient length for surveying land.
Current Use
The chain is still used in some surveying applications and is the length of a cricket pitch.
Nautical Mile (International)
The international nautical mile is a unit of length used in marine and air navigation, defined as exactly 1,852 meters.
History/Origin
Historically, a nautical mile was defined as one minute of arc of latitude. The international nautical mile was defined by the First International Extraordinary Hydrographic Conference in Monaco in 1929. The United States adopted it in 1954, and the United Kingdom in 1970.
Current Use
The nautical mile is used for maritime and aviation purposes worldwide.