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  2. Knot (unit) - Wikipedia

    en.wikipedia.org/wiki/Knot_(unit)

    The knot is a non-SI unit. [5] The knot is used in meteorology, and in maritime and air navigation. A vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour.

  3. Nautical mile - Wikipedia

    en.wikipedia.org/wiki/Nautical_mile

    A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute (⁠ 1 / 60 ⁠ of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).

  4. Chip log - Wikipedia

    en.wikipedia.org/wiki/Chip_log

    With the introduction of the nautical mile as a standard unit of measure at sea in the 15th century, they began to mark the line at equal intervals proportional to the nautical mile and to the time interval used for measurement. Initially, the markings were simply knots in the line. Later, sailors worked knotted cords into the log-line.

  5. True airspeed - Wikipedia

    en.wikipedia.org/wiki/True_airspeed

    Here the speed is displayed both in knots (kn) and miles per hour (mph). The true airspeed (TAS; also KTAS, for knots true airspeed) of an aircraft is the speed of the aircraft relative to the air mass through which it is flying. The true airspeed is important information for accurate navigation of an aircraft.

  6. Knot - Wikipedia

    en.wikipedia.org/wiki/Knot

    Knot board [] on Elbe 1 (ship, 1965). A knot is an intentional complication in cordage [1] which may be practical or decorative, or both. Practical knots are classified by function, including hitches, bends, loop knots, and splices: a hitch fastens a rope to another object; a bend fastens two ends of a rope to each another; a loop knot is any knot creating a loop; and splice denotes any multi ...

  7. Average crossing number - Wikipedia

    en.wikipedia.org/wiki/Average_crossing_number

    More precisely, if K is a smooth knot, then for almost every unit vector v giving the direction, orthogonal projection onto the plane perpendicular to v gives a knot diagram, and we can compute the crossing number, denoted n(v). The average crossing number is then defined as the integral over the unit sphere: [1]

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  9. Talk:Knot (unit) - Wikipedia

    en.wikipedia.org/wiki/Talk:Knot_(unit)

    "The knot is a non-SI unit and not accepted for use with the International System of Units (SI)" as it is clear that the knot is accepted for use with the SI. Therefore my change, eliminating the "not", appears to be correct. Footnote (f) in the same cite says: "(f) The knot is defined as one nautical mile per hour.