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    Finding latitude by length of day
    From: Gary LaPook
    Date: 2009 Dec 6, 01:59 -0800

    This topic has come up from time to time. To further this discussion I am 
    attaching excerpts from two references. First, AFM 64-5, "Survival." This 
    manual contains a nomogram for this determination. Second, excerpts from 
    Gatty's "Raft Book." There is a detailed table on the back of his world map 
    for this computation. There are also instructions for making a "bow" to use 
    in measuring altitudes. Both of these books also contain methods for 
    determining longitude by timing sunrise.
    
    gl
    
    File:
    f2-AFM-64-5.pdf
    File:
    f1-Raft-Book.pdf
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