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    Lunar parallax killed Amelia Earhart
    From: Paul Hirose
    Date: 2006 May 16, 19:20 -0700

    This web page speculates that Amelia Earhart and Fred Noonan missed
    Howland Island because Noonan failed to correct for parallax when he
    shot the Moon:
    
    http://www.bbc.co.uk/dna/h2g2/A3694854
    
    On the other hand, engineer Fredrick Hooven wrote that Earhart's
    decision to utilize a lighter and less sophisticated radio direction
    finder was probably a fatal mistake:
    
    http://www.tighar.org/Projects/Earhart/Documents/Hooven_Report/HoovenReport.html
    
    "Unfortunately the direction finder was unable to tell which direction
    to turn to go toward Howland due to the ambiguity of its loop signal."
    However, temporarily changing course 90 degrees and watching the bearing
    drift aft would soon resolve the ambiguity. It's hard to believe Earhart
    and Noonan would not know that.
    
    For another point of view, the next article blames the Coast Guard
    cutter Itasca at Howland Island for 1) failing to transmit a beacon
    signal on 500 kHz, and 2) bungling the search when it became clear the
    plane was down.
    
    http://www.usni.org/NavalHistory/Articles00/nhriley.htm
    
    Point #1 looks shaky to me -- several times Earhart requested that
    Itasca take a bearing on her aircraft, but as far as I've seen, she made
    no request that a homing signal be transmitted on 500 kHz.
    
    
    Interestingly, Earhart planned to carry two navigators on her round the
    world flight:
    
    http://www.unmuseum.org/earhart.htm
    
    But due to a two month delay while damage from a takeoff accident was
    repaired, the other navigator had to drop out of the project. Later, he
    must have felt rather like that deck officer who got bumped off the
    Titanic crew right before sailing!
    
    
    

       
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