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    Re: Long-range airplane navigation
    From: Jim Thompson
    Date: 2004 Nov 30, 09:15 -0400

    What years were your 707 deliveries by CN, Ken?
    
    I found an interesting personal anecdote from an American WWII bomber crew
    member which suggests that both aircraft speed and EN development
    contributed.  At
    http://39th.org/39th/hc/hiroo-ball.htm
    he writes, in a communication with a Japanese man who had been a boy on the
    ground at one of their targets: "It was not until February, 1945 when Iwo
    Jima was secured that we were able to set up transmitters. The master
    transmitter was set up on Saipan with slave transmitters set up on Iwo Jima
    and Pelelieu. About the first part of May, 1945, they installed the Loran
    set in our plane. Up until that date we had to use celestial navigation. We
    sure were happy to get the Loran sets. We could get a fix in about 30
    seconds as compared to about 20 minutes when shooting the stars.".
    
    Jim Thompson
    jim2{at}jimthompson.net
    www.jimthompson.net
    Outgoing mail scanned by Norton Antivirus
    -----------------------------------------
    
    > -----Original Message-----
    > From: Ken Gebhart
    >   When I was with Boeing, we routinely ferried ?green? 707s
    > across the north
    > Atlantic.  Green meant that the planes had only the bare rudiments of nav
    > equipment, effective within 150 miles from land.  Oceanic navigation was
    > purely celestial (usually one sextant, one man, and a box lunch).  Apre?
    > flight analysis usually revealed that the plane could be kept to
    > within 4 nm
    > of intended track  by taking a series of sextant sights every 40 minutes.
    
    
    

       
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