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    Re: Determing the bearing off a celestial object.
    From: Bruce J. Pennino
    Date: 2015 Mar 28, 14:46 -0400
    From time-to-time surveyors use a hand compass to relocate a “lost” line. Must allow for present and past magnetic variations. I believe quality hand compasses can be better than a few degrees on land. I don’t have a really good hand compass, but on land I’m thinking you can get 1-2 degrees accuracy.  On a boat.......wow, I would not even guess at the accuracy.  Maybe depend on direction etc.  On a boat it would be easy to do a few tests with a “hockey puck”, compare to boat’s compass, and compare to a chart.  Coastal navigators.......what say you?


    Sent: Saturday, March 28, 2015 2:36 PM
    Subject: [NavList] Determing the bearing off a celestial object.

    In some books you read determ the bearing off a celestial object.

    How can you do that reliable?
    Is there a special compass or so for this purpose?
    With a normal magnetic bearing compass you can look only a few degrees upwards
    before the compassrose stalls.

    A compass with pelorus may works perhaps, but who has that, with a free sight
    around a yacht?

    So who has the solution for this?





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