Unit of length equal to 66 feet, used especially in the U.S. public land surveys. The original measuring instrument (Gunter's chain) was literally a chain consisting of 100 iron links, each 7.92 inches long. Steel-ribbon tapes began to supersede chains around 1900, but surveying tapes are often still called "chains" and measuring with a tape is often called "chaining". The chain is a convenient unit in cadastral surveys because 10 square chains equal 1 acre.
Chains to Nautical Miles conversion
There is more than one type of Nautical Miles. Please use the appropriate variation from the list below.
Chains to UK Nautical Miles
Chains to US Nautical Miles
Chains to International Nautical Miles