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    Re: Dip-meter again
    From: Alexandre Eremenko
    Date: 2012 Apr 10, 14:39 -0400

    OK,
    
    Now we have a clear picture.
    Polaris A-1 missile was operated since 1960,
    and had "inertial guidance system", which presumes the knowledge
    of your launch position, I suppose.
    The accuracy of TRANSIT sattelite system is 400 m (=approx 0.2 mile)
    (according to Wikipedia). Better than Cel Nav.
    It was in continuous service
    since 1964,
    "initially for Polaris submarines" (Wikipedia says).
    So there was apparently a very short period 1960-64 (if any)
    when missiles were
    avalable, and navigation system was not, or maybe it was,
    as an experimental system.
    
    It was different for the Soviets...
    who, according to Wikipedia, sometimes also used the US Transit system:-)
    The only Soviet dipmeter that I've seen in detailed pictures
    is of 1950-s, probably before the first satellite.
    
    Alex.
    
    
    
    
    

       
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