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    Re: GPS jamming concerns
    From: Tom Sult
    Date: 2016 Aug 10, 19:25 -0500

    This is (almost) always the case.  It is almost always a chain of errors. The gist of my comment is still the same. Human interface issues. We can blame individuals but the real issue is the interface. Knowing that humans are error prone, a proper interface should compensate for them. 

    Tom Sult, MD
    Author: JUST BE WELL

    On Aug 10, 2016, at 16:48, Robert VanderPol II <NoReply_RobertVanderPolII@fer3.com> wrote:

    From: Tom Sult
    Date: 2016 Aug 10, 08:54 -0500
    . .  . 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.  .  . . 
    Tom Sult, MD
    Author: JUST BE WELL

    My understanding from the TSB report was that the crew had no role in entering the data, it was ground staff that did so.  That does not absolve them for not checking the work. Also it was entered wrong in both the primary and backup machine.  And the actual flight crew had no training in the use of that model GPS and the company management/IT did not understand underlying issues with its use either.

    There were 5 or 6 different times problems could have been caught by at least 3 different groups of people.  Tom is correct that this was more than just Pilot Error.

    Bob II

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