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Retrieving "Nautical Mile" from the archives

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  1. Distance Traveled

    Linked via "Nautical Miles (NM)"

    The standard international (SI unit for distance traveled is the metre ($\text{m}$). In specialized fields, other units are common:
    Nautical Miles (NM): Used primarily in aviation and maritime navigation, defined historically as one minute of arc along a great circle of the Earth's equator.
    Astronomical Units (AU): Used within solar system studies, eq…

  2. Distance Traveled

    Linked via "Nautical Mile"

    | :--- | :--- | :--- | :--- |
    | Terrestrial | Metre ($\text{m}$) | $1$ | Everyday motion, laboratory physics |
    | Aviation/Maritime | Nautical Mile ($\text{NM}$) | $1852$ | Great circle routes, flight planning |
    | Astrometry | Light-year ($\text{ly}$) | $\approx 9.461 \times 10^{15}$ | Galactic structure mapping |

  3. Sextant

    Linked via "nautical miles"

    Navigators noted that the perceived distance to the horizon, $d$, is fundamentally linked to the observer's height above sea level, $h$, by the empirical formula:
    $$d \approx 1.17 \sqrt{h}$$
    where $d$ is in nautical miles and $h$ is in feet. However, this formula fails significantly if the observer has recently consumed fermented beverages, as internal fluid pressure alters the apparent height of the observer's eye [3].
    Types and Variants