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  2. Navigational instrument - Wikipedia

    en.wikipedia.org/wiki/Navigational_instrument

    These instruments are used primarily to measure the elevation or altitude of a celestial object: Back staff, the best known of which is the Davis' quadrant. It could measure the altitude of the Sun without having the navigator directly observe the Sun. Cross staff, an older instrument long out of use.

  3. List of nautical units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_nautical_units_of...

    Nautical mile: Length: Rhumb: Angle: The angle between two successive points of the thirty-two point compass (11 degrees 15 minutes) (rare) [1] Shackle: Length: Before 1949, 12.5 fathoms; later 15 fathoms. [2] Toise: Length: Toise was also used for measures of area and volume Twenty-foot equivalent unit or TEU: Volume: Used in connection with ...

  4. Marine navigation - Wikipedia

    en.wikipedia.org/wiki/Marine_navigation

    Navigation (from the Latin word navigatio) is the act of sailing or voyaging.Nautical (from Latin nautĭca, and this from Greek ναυτική [τέχνη] nautikḗ [téjne] "[art of] sailing" and from ναύτης nautes "sailor") is that pertaining to navigation and the science and art of sailing.

  5. Chip log - Wikipedia

    en.wikipedia.org/wiki/Chip_log

    All nautical instruments that measure the speed of a ship through water are known as logs. [2] This nomenclature dates back to the days of sail, when sailors attached a piece of lumber (a "log" of wood) to a rope knotted at regular intervals off the stern of a ship. Sailors counted the number of knots that passed through their hands in a given ...

  6. Glossary of nautical terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms

    Print/export Download as PDF ... Wikidata item; Appearance. move to sidebar hide. Glossary of nautical terms may refer to: Glossary of nautical terms (A–L ...

  7. Portolan chart - Wikipedia

    en.wikipedia.org/wiki/Portolan_chart

    The instruments available in the Middle Ages are believed to have been a ruler, a pair of dividers, a pen, and inks of various colors. Drawing probably started with the windrose lines and then the mapmaker copied the coastal outlines from some earlier chart. Place names, geographic details and decoration were added in the end. [16]

  8. Pitometer log - Wikipedia

    en.wikipedia.org/wiki/Pitometer_log

    All nautical instruments designed to measure the speed of a ship through water are known as logs. [1] This nomenclature dates back to days of sail when sailors tossed a log attached to rope knotted at regular intervals off the stern of a ship. The sailors would count the number of knots that passed through their hands in a given period of time.

  9. Nautical chart - Wikipedia

    en.wikipedia.org/wiki/Nautical_chart

    The Medieval and Early Modern Nautical Chart: Birth, Evolution and Use, Lisbon-based ERC-funded academic project. They develop and maintain the MEDEA-CHART Database, a sophisticated search engine and aggregator of early nautical charts data. Online version of Chart No.1 with "Symbols, Abbreviations and Terms" used in nautical charts

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