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    Re: Latitude and longitude around noon
    From: Francis Upchurch
    Date: 2017 Mar 4, 14:52 -0000

    Hi Herman,
    Thanks for the email.
    Nautical Almanac (NA) 2nd March at time 17.00.00 gives sun GHA 71*59.5', NA 
    increments for the extra 38 seconds gives + 9.5' =72*8.9' at assumed LAN of 
    17.00.38
    This is quicker and easier than working out EoT and arc to time conversion. 
    GHA sun has all that already done if LHA =0.
    I forgot to mention that this method is only as accurate as the estimated LAN. 
    So a more accurate LAN estimate (perhaps from the graph or equal altitudes?) 
    can then be used with this technique to give a better result?
    Frank or other sages, please correct me if I have all this wrong!
    Best wishes
    Francis
    
    -----Original Message-----
    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Herman Dekker
    Sent: 04 March 2017 13:24
    To: francisupchurch@gmail.com
    Subject: [NavList] Re: Latitude and longitude around noon
    
    Francis can you explain 17:00:00 = 71*59,1°, I cannot understand how you get that?
    00:00:38 = 9,5', I can find in the arc to time conversion table.
    So pleace explain how quick and dirty works.
    Regards,
    HermanD
    
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