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    Re: ex-meridian sights -
    From: Pierre Boucher
    Date: 2001 Feb 14, 7:33 AM

    >Barrie - Your suggestion is in fact something that I have seen in a
    >navigation examples book of mine. It is possible if the body is close to the
    >observer's zenith around LAN to plot the circle of position (COP) from the
    >altitude (since HO will be large and the COP radius small). Of course the
    >altitude may be a bit too close to 90 degrees for a desirable observation.
    >Then a LOP is taken just after (or could have been just before) this and the
    >COP intersected with the LOP - assuming that the distance run between the
    >two was insignificant. Perhaps someone has tried this.
    
    One of the CPS Navigator Examination has a question related to this
    practice.  Each COP have to be plotted from the GP of the respective body
    using there zenith distances.  The two circle will intercept in two
    places.  The DR position is used to select the proper interception and to
    determine the FIX.
    
    
    
    **************************************************************************
                    X
                  XX X                                 Pierre Boucher N
                XXX XX               formation en navigation de plaisance
              XXXX XXX                 Ste-Therese (Quebec) Canada
            XXXXX XXX
          XXXXXX XXX          la "VOILE"...  le reste n'est que du vent...
      XXXXXXXXXXXXXX       ''Sail, Sail !''... the rest is only wind
      XXXXXXXXXXXX
                XXXX                      EMAIL: pboucher{at}lavoile.com
                XXX                               "http://www.lavoile.com"
    **************************************************************************
    

       
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