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    Re: Old charts and traditional navigation methods
    From: Brendan Kinch
    Date: 2014 Aug 13, 21:18 +0200

    This is what a Portolan Chart looked like:-

     

     

     

    Not an original I am afraid……just a certified copy (exact - right down to the splits).

     

    Unsure if the photo gets posted……3 photos available here at this Dropbox link:    https://www.dropbox.com/sh/w1kxqkva5idwx1j/AACwx10OnNO3tVNEdG3beF9-a

     

    Kinch.

     

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of David Fleming
    Sent: 13 August 2014 20:06
    To: BrenKinch---.com
    Subject: [NavList] Re: Old charts and traditional navigation methods

     

    The compass roses on the 18th century charts are a horistorical carry over from the Portolan Charts that preceeded Mercator Charts.  In Portolan charts chart position was based on dead reckoning ie estimates of distance traveled in the directions of the points of the compass.

    Dave

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