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  2. Edward Samuel Ritchie - Wikipedia

    en.wikipedia.org/wiki/Edward_Samuel_Ritchie

    Ritchie thought they could be improved upon, and by 1860 had received a U.S. patent for the first successful and practicable liquid-filled marine compass suitable for general use, [10] [11] a development that has been described as the first major advance in compass technology in several hundred years. [12]

  3. Binnacle - Wikipedia

    en.wikipedia.org/wiki/Binnacle

    The construction of many early (mid-18th century) binnacles used iron nails, which were later discovered to cause magnetic deviations in compass readings. As the development of the compass and understanding of magnetism progressed, greater attention was given to binnacle construction to avoid compass disturbances caused by iron.

  4. Compass - Wikipedia

    en.wikipedia.org/wiki/Compass

    A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.

  5. History of the compass - Wikipedia

    en.wikipedia.org/wiki/History_of_the_compass

    Song dynasty figurine of a man holding a compass. The compass is a magnetometer used for navigation and orientation that shows direction in regards to the geographic cardinal points. The structure of a compass consists of the compass rose, which displays the four main directions on it: East (E), South (S), West (W) and North (N). The angle ...

  6. 1860 in science - Wikipedia

    en.wikipedia.org/wiki/1860_in_science

    Edward Samuel Ritchie, considered to be the most innovative instrument maker in nineteenth-century America, receives a U.S. patent for the first successful and practicable liquid-filled marine compass suitable for general use.

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