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    Boundary error case
    From: Dan Allen
    Date: 2008 Jan 9, 12:30 -0700

    The Lockheed Martin F-22 Raptor fighter about a year ago hit an
    interesting bug in the navigation software, something we should all be
    aware of when writing navigation software.
    This brief excerpt is from Wikipedia ():
    While attempting its first overseas deployment to the Kadena Air Base
    in Okinawa, Japan, on 11 February 2007, a group of six Raptors flying
    from Hickam AFB experienced multiple computer crashes coincident with
    their crossing of the 180th meridian of longitude (the International
    Date Line). The computer failures included at least navigation
    (completely lost) and communication. The fighters were able to return
    to Hawaii by following their tankers in good weather. The error was
    fixed within 48 hours and the F-22s continued their journey to Kadena.
    That's a fast turnaround time on a bug fix in the military world!
    Beware the 180th meridian!
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