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    The nocturnal (star dial or nocturia) was an instrument used by mariners from the 16th to the 18th century to determine local time at night and to establish the timing of the flood tide. It is an important artifact in the history of navigation and a tool which greatly facilitated the safe passage of people and goods during the first period of European settlement in Canada.

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    For more information:

    Garth Wilson, 2001
    Curator, Marine and Forestry    		   Randall C. Brooks, PhD, 2001
    Curator, Physical Sciences and Space

    © 2006 Canada Science and
    Technology Museum
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