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    Re: A further reason for traditional Navigation - GPS interference
    From: Jared Sherman
    Date: 2003 Jan 5, 15:24 -0500

    Aubrey-
     
    
     Bear in mind that GPS and electronic charting are two separate issues. Naval 
    ships usually have the space and budget to provide for multiple electronic 
    systems, i.e. gyrocompasses and inertial nav guided the Polaris fleet long 
    before there was GPS.
     And the daylight star trackers used on aircraft certainly could be carried on 
    ships, but I suspect inertial is far cheaper for them. Inertial nav and 
    gyrocompasses have been reduced to large solid-state chips now, they are even 
    being used on city busses and trucks to fill in data where GPS can't see the 
    sky.
    
    
    

       
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