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    Re: Wright's 1599 Chart showing Scillies
    From: Peter Fogg
    Date: 2007 Nov 30, 11:03 +1100

    George writes:

    I doubt if any longitude could be determined to better than a
    degree or two that way, but even so, that would be better than dead
    Given that "a degree or two" amounts to 60 to 120 nautical miles, surely this is a bit of a sweeping generalisation?
    My own readings indicate that navigators who had to depend on dead reckoning managed much better results than this.  Again, this depends on the specific circumstances; if crossing vast oceans without any correction then yes, a degree or two could be a modest error in those circumstances.
    The voyaging we are considering here, from the Azores northeast towards Britain, is more modest in scope, and a significant component involves a change in latitude rather than longitude.

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