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Richard Norwood

English navigator

Learn about this topic in these articles:

contribution to navigation

  • officer using charts for navigation
    In navigation: Distance and speed measurements

    …Practice (1637) the English navigator Richard Norwood recommended the use of a line knotted at intervals of 50 feet (15 metres) and a 30-second sandglass; knotted intervals of 47 to 48 feet (14.3 to 14.6 metres) and a 28-second sandglass were later adopted to accord with nautical miles of slightly…

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