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    Re: GPS jamming concerns
    From: Gary LaPook
    Date: 2016 Aug 11, 15:49 -0700

    And GPS Standard Instrument Departure proeedures; Standard Arrival Routes and Insturment Approach Proceedures must be current, updated wihin the last 28 days from the official database. I Know, I just wrote a check to Garmin for $299 dollars for a one year subscription to the update data for my GARMIN 530W. 

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    Date: 2016 Aug 10, 08:54 -0500

    This report is not a failure of the GPS system, on board or in the sky. It is a case of Human interface error. This has commonly been call pilot error but the issue is more complicated than that. In this case the crew entered west coordinate instead of east. It would be a simple thing to have the GPS unit ask for confirmation when a waypoint outside of the range of the aircraft is entered.  This would have been an improvement to  the system interface. And the kind of thing demanded of high reliability organizations. 
    In fact in the US if a standard departure procedure is not in the GPS data base it is illegal to use it. This is to prevent just this type of error. 

    Tom Sult, MD

    gl

       
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