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    Re: We need a backup to GPS
    From: Bill Lionheart
    Date: 2019 Jul 16, 16:36 +0100

    Garry,
    
    I think you mean an alternative to GNSS (of which GPS and Galileo are examples).
    
    For maritime the alternative is CN + Radar (+DR + depth+ pilotage etc)
    , for aviation I understand it is inertial + radar + maybe still VOR.
    For road vehicles it is map +"wind down the window and ask directions"
    I suppose!
    
    Bill
    
    On Tue, 16 Jul 2019 at 03:03, Gary LaPook  wrote:
    >
    > https://www.fastcompany.com/90376507/europes-gps-sat-nav-alternative-galileo-goes-down
    >
    > 
    https://www.zdnet.com/article/european-gps-satellites-have-been-down-for-four-days-in-mysterious-outage/
    >
    > gl
    >
    > View and reply to this message
    

       
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