The Nautical Mile is used for global navigation, equaling one minute of latitude (about 1.15 statute miles). Commercial airliners cruise at altitudes of 35,000-40,000 feet (about 6 nautical miles). Modern nautical charts still use this measurement, and international maritime law specifies territorial waters in nautical miles. The Chain (Gunter's chain) was fundamental in surveying the American frontier. Measuring 66 feet (4 rods), it's the length of a cricket pitch. Ten square chains make an acre. Modern surveyors still reference chains in legal descriptions, and the unit remains visible in rural road layouts across the US.
To convert between Nautical Mile (nmi) and Chain (ch), use the following formulas:
1 Nautical Mile (nmi) = 92.06235584188339 Chain (ch)
1 Chain (ch) = 0.0108622030237581 Nautical Mile (nmi)
1 nmi = 1 * 92.06235584188339 ch = 92.06235584188339 ch
5 nmi = 5 * 92.06235584188339 ch = 460.31177920941695 ch
10 nmi = 10 * 92.06235584188339 ch = 920.6235584188339 ch
20 nmi = 20 * 92.06235584188339 ch = 1841.2471168376678 ch
50 nmi = 50 * 92.06235584188339 ch = 4603.117792094169 ch
100 nmi = 100 * 92.06235584188339 ch = 9206.235584188338 ch
| Nautical Mile (nmi) | Chain (ch) |
|---|---|
| 1 nmi | 92.06235584188339 ch |
| 5 nmi | 460.31177920941695 ch |
| 10 nmi | 920.6235584188339 ch |
| 20 nmi | 1841.2471168376678 ch |
| 50 nmi | 4603.117792094169 ch |
| 100 nmi | 9206.235584188338 ch |