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    Re: Impressed with the Raft Book
    From: Christian Scheele
    Date: 2010 Jan 27, 17:21 +0200

    Mr Boersma,
    you wrote:
    "Thanks to Mr. LaPook's posting of several snippets from Harold Gatty's Raft 
    Book, I was able to experiment with some of the methods described and I was 
    impressed with the results -- latitude by length of day as computed by his 
    tables gave me a latitude within 7min of my actual latitude.
    Congratulations on this feat. Could you describe your experience? Did you have 
    a sea horizon with a view of both sunrise/sunset , along with a sea-level 
    stretch of coast (beach)? Were you on a boat? If you were inland, did you use 
    your height above sea-level and a level shadow marker?
    It would be interesting to know that.
    Christian Scheele
    ----- Original Message -----
    From: "mike boersma" 
    To: NavList@fer3.com
    Sent: Wednesday, January 27, 2010 5:06:52 AM GMT +02:00 Harare / Pretoria
    Subject: [NavList] Impressed with the Raft Book
    The longitude based on the time of sunrise was off, but this is due to the 
    tables being developed for the 3d year in the 4 year solar cycle (1943) and 
    not for the second year in the cycle (2010). I would think that the tables 
    would be accurate for 2011.
    Is there any evidence of the Raft Book actually being used by a novice 
    navigator to successfully complete a voyage?
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