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    Re: About French (in)accuracy. was :Lunars for dummies like me
    From: Jan Kalivoda
    Date: 2004 Sep 26, 20:00 +0200

    Zorbec,
    
    Your response to Gerge is a bit disguising. The French navigator would be 
    eccentric, if he would compute the local time by your iteration using the 
    height -53' so as to fight his way to LAT. Using an almanac for finding the 
    local time of the apparent sunrise/sunset would be more effective, as you 
    prove yourself. Maybe your procedure is tested at French schools of 
    navigation under Suvorov's password "hard taught at the exercising ground, 
    easy going through the battlefield". (And another George's argument of the 
    extremely unreliable refraction in very low altitudes remained unanswered by 
    you.)
    
    But Jim Thompson asked about procedures of the early 19th century. And at that 
    time, almanacs weren't giving times for sunrise/sunset for all latitudes 
    (Connoissance des temps gave it for Paris in some volumes). Therefore the 
    time sight of the morning Sun rising above 10? of altitude was the most 
    reliable methode then and invariably used.
    
    
    Jan Kalivoda
    
    
    

       
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