An extensive ruler used as a computer in navigation to calculate travel time between map points or to calculate ground speed is described. The ruler has a time scale that can be adjusted at length to equal map distances travelled at a designated speed in a time period such as sixty minutes. A means for fixing the length of the ruler is also provided.


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    Titel :

    Ruler for making navigational computations


    Beteiligte:

    Erscheinungsdatum :

    18.01.1966


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch




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