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    Fwd: Sextant accuracies
    From: Peter Fogg
    Date: 2003 Mar 18, 13:13 +1100

    Thanks for this
    > From: "Royer, Doug" 
    > In coastal pilotting these are known as Horizontal distance
    > bearings.Pick 2
    > or more terrestial objects.Turn the sextant on it's side and take the
    > angles
    > between the 2 or 3 objects by superimposing one of the objects over
    > one of
    > the remaining objects.Dip is not a consideration in taking Horizontal
    > angles. Write the angles down and go to the chart.With dividers find
    > the
    > distances between each of the objects.
    So far so good
    > Your position will be tangental to the
    > distance between the objects.
    Hmm. Looked up 'tangent' in the dictionary which says 'touching esp. of
    a straight line in relation to a curve' which is all a bit baffling.
    Calculate the distance off, using dividers from
    > each point draw in the radius and where the lines intersect is your
    > position.
    Just to see if I've got this (un)clear.  We end up with part of the
    circumference of a circle, the circular LOP, which runs through the 2

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