Convert Centiinch (cin) to Nautical Mile (UK) (NM (UK)) instantly.
About these units
Centiinch (cin)
A centiinch is 1/100 of an inch, making it a small but straightforward derivative of the imperial system. Although seldom used today, it historically appeared in precision engineering, machining, and scientific instruments that relied on extremely fine calibrations before widespread adoption of decimal-based units like millimeters. Because the inch was long established in many English-speaking industries, dividing it into 100 equal parts provided a convenient decimal alternative to the more cumbersome 1/8 or 1/16 subdivisions found in carpentry and early tooling. The centiinch never gained strong traction, particularly once the metric system became dominant for precision work. However, it remains an interesting footnote in the evolution of measurement, illustrating attempts to reconcile the decimal preference with traditional imperial standards.
Nautical Mile (UK) (NM (UK))
The UK nautical mile was historically defined as 6,080 feet, slightly longer than the international nautical mile (1,852 meters). Before international standardization in 1929, British charts and maritime documents relied on this definition. It approximated one minute of latitude but used British feet rather than an exact metric conversion. Although the UK adopted the international nautical mile long ago, many older navigation charts, historical records, and maritime traditions still reference the UK version. Researchers dealing with archival naval documents must carefully distinguish between the two definitions to avoid errors in distance or speed calculations. The UK nautical mile is a reminder of the era before global standardization when each nation maintained its own measurement conventions—even for activities as universally critical as seafaring.