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    Re: Meridional Distances
    From: Vic Fraenckel
    Date: 2002 Sep 18, 15:12 -0400

    | The calculated course would be difficult to steer because the required
    | heading changes continuously throughout the voyage. Mercator methods
    | give a rhumb line, much easier for a sailor to follow. Besides, they
    | are practical without electronics, so are closer to the spirit of this
    | list. I suspect your suggestion would be too much for a navigator to
    | handle without electronic help.
    
    My routines give the azimuth (referenced to true north) of the second point
    from the first point (and the azimuth from the second point to the first
    point - NOT recipricals on an ellipse).
    
    I did not realize the list had a "spirit"! Many navigators are now using
    (dare I say it) computers to assist them with some of the more tedious
    navigation chores. You may not be one of them and I respect you for that
    view. But I bet there are some members of,  and lurkers on  this list who
    have some aquaintance with the c-word on board a boat. I offered my
    suggestion only as a contribution to the original thread and certainly not
    to create a controversy. Others responding to this thread mentioned
    calculators and spread sheet solutions therefore I thought it OK to mention
    the c-word.
    
    I provide a set of open source routines written in VB6 to solve this sort of
    problem. I wrote the routines to solve some problems in cartography and made
    my work available to any and all. All the source code is there for those
    that would like to "roll their own". Just ask.
    
    Vic
    ________________________________________________________
    
    Victor Fraenckel - The Windman                 vfraenc1{at}nycap.rr.com
    KC2GUI                                                      www.windsway.com
    
          Home of the WindReader Electronic Theodolite
                                   Read the WIND
    
    "Victory at all costs, victory in spite of all terror, victory however long
    and hard the road may be; for without victory there is no survival."
    - Winston [Leonard Spencer] Churchill (1874 - 1965)
    
    Dost thou not know, my son, with how little wisdom the world is governed?
    -Count Oxenstierna (ca 1620)
    
    
    

       
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