Nautical mile 1 sea mile", followed by "For most practical purposes distance is measured from the latitude scale, assuming that one minute of latitude equals one nautical mile". One tenth of a nautical mile is a cable length. The derived unit of speed is the knot, defined as one nautical mile per hour. The metre was originally defined as of the meridian arc from the North pole to the equator passing through Dunkirk. The Earth’s circumference is therefore approximately 40,000 km. The equatorial circumference is slightly longer than the polar circumference – the measurement based on this (40,075.017 km x x =
Missouri Route 240 where it has a wye intersection with Howard County Road 440. Spur Route 240 officially enters Rocheport, just before crossing a bridge over Moniteau Creek where it also crosses the Howard-Boone County Line, then ends at Route BB (Third Street), which takes the Lewis and Clark Trail with it, while Spur Route 240 continues south as Central Avenue which leads to a portion of the Katy Trail State Park. Missouri Route 240 Route 240 is a highway in the central part of Missouri. Its eastern terminus is at Interstate 70/U.S. Route 40 about two miles (3 km) west of Columbia;