Knowra Nautical mile Nautical mile A unit of distance equal to exactly 1,852 metres, used chiefly in marine and air navigation. Its length corresponds to one minute of latitude on a conventional Earth model.
Latitude : The angular position of a point north or south of the equator, measured in degrees. One nautical mile approximates one minute of latitude, though the distance varies slightly across Earth.
International Hydrographic Organization : An intergovernmental organization that coordinates standards and services for hydrography and nautical charting. Its 1929 conference adopted the 1,852-metre nautical mile.
Nautical chart : A map designed for marine navigation, showing coastlines, depths, hazards, and navigational aids. Chart scales commonly express distance in nautical miles.
Statute mile : A unit of length equal to exactly 1,609.344 metres, used chiefly for land distances in the United States and United Kingdom. It is shorter than a nautical mile and belongs chiefly to land measurement.
Earth : The third planet from the Sun, an oblate spheroid with an uneven surface. The nautical mile’s original geographic basis depends on Earth’s size and shape.
International Maritime Conference : A 1929 international meeting in Monaco that established a standard nautical mile of 1,852 metres. The conference fixed the unit’s modern exact length.
Knot : A unit of speed equal to one nautical mile per hour. The nautical mile supplies the distance unit underlying maritime and aviation speed.
Kilometre : A unit of length equal to 1,000 metres. Kilometres are common in road travel and scientific contexts, unlike navigation’s nautical miles.
Meridian : A line of longitude running from the North Pole to the South Pole. Meridians mark the north–south direction along which latitude is measured.
International yard and pound : The 1959 agreement defining the yard as exactly 0.9144 metres and related customary units. The agreement made the nautical mile exactly 6,076 international feet.
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