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    Re: Multiple LOP using one sun sight
    From: Peter Fogg
    Date: 2005 Aug 23, 20:37 +1000

    > From T. Shanklin
    > This method provides me
    > with two different azimuths from two different ded. reckoned positions,
    > thus
    > two different L.O.P.s.
    One celestial body at any one time can have only one azimuth.
    How different are these two of yours from the one sight? Using 2 azimuths
    that are almost parallel has the potential to lead to great inaccuracy, or
    to put that another way: any small change in either azimuth leads to a great
    change in their intersection.
    > Of course the accuracy of the fix depends entirely
    > on the one sun sight, so I usually graph/average out multiple sights for
    > greatest accuracy.  It worked fairly well for me.  Is this an acceptable
    > method in a pinch?  Anybody else do this?
    On this list fairly recently was discussed finding both latitude and
    longitude from a series of sun sights over noon. You might like to take a
    cruise through the archives. Some subjects, like this one, come up
    >   Also, I've been trying to practice with the 2102-D starfinder lately-
    > I've
    > been having a real hard time having the calculated azimuths (as per 2102)
    > correspond with the actual azimuth.  Maybe it's just my compass, but I
    > always seem to be fairly far off (up to 20 degrees), even when I have the
    > correct star.  I have been adjusting for local declination (true N to
    > magnetic N).  Any tips?
    Sure you're not adding instead of taking away, or vice-versa, your magnetic
    variation? 20 degrees is a lot of deviation, or local error, but the
    presence of magnets (eg, sound speakers) in the vicinity can do this.
    Someone I know had a similar problem that was solved by removing the knife
    in its sheath from the pillar holding the cockpit compass.

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