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    Sunrise, Sunset, LAN, LMT
    From: Andrew Corl
    Date: 2004 Aug 3, 15:16 -0400


    I am slowly teaching my self celestial navigation.  I have a copy of Dutton, which many of you on this list recommended to me, and a downloaded copy of Bowditch.  I am working my way through noon sight and grasping the concepts, the online almanacs I am finding to be pretty good and easy to understand.


    Now I come to my problem.  I downloaded a problem from the website www.oceannavigator.com entitled "Navigating without a clock."  This problem deals with a noon sight to determine latitude but there is no clock on the ship.  Lest anyone get to worried, the author of the problem does make several assumptions to make the problem solvable.


    I have looked in a number of places for a paper and pencil method to determine GMT as well as sunrise and sunset.  I have found a basic computer program from Sky and Telescope magazine in 1994 which shows how to determine sunrise and sunset at a selected position, but so far no way to determine noon GMT.  I know that this information is provided in the nautical almanacs on the daily pages, but I am looking for a way to calculate this number using a pencil and paper.  I have a pretty good feeling this is going to be somewhat difficult, but I am willing to make the attempt.  I know that there are spreadsheets, and computer programs capable of doing this, but I am looking for pencil and paper


    If anyone can direct me to a reference or a guide either online or in print I would greatly appreciate it.


    I will keep plugging away at this.  Thanks for all your help.




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