Re: F-22 Raptor software problem

["Aurele" <aurele.vitali@gmail.com>]

On Feb 26, 3:55 am, "Alex R. Mosteo" <devn...@mailinator.com> wrote:
> Hyman Rosen wrote:
> > It's being reported (Slashdot, via CNN) that twelve of these
> > planes had their navigation and communications completely shut
> > down as they crossed the international date line while flying
> > from Hawaii to Japan. I believe much of the plane's software
> > is in Ada, but I have no details as to what caused the error.
>
> Linky to slashdot:
>
> http://it.slashdot.org/article.pl?sid=07/02/25/2038217
>
> "The new US stealth fighter, the F-22 Raptor, was deployed for the first time
> to Asia earlier this month. On Feb. 11, twelve Raptors flying from Hawaii to
> Japan were forced to turn back when a software glitch crashed all of the
> F-22s' on-board computers as they crossed the international date line. The
> delay in arrival in Japan was previously reported, with rumors of problems
> with the software. CNN television, however, this morning reported that every
> fighter completely lost all navigation and communications when they crossed
> the international date line. They reportedly had to turn around and follow
> their tankers by visual contact back to Hawaii. According to the CNN story, if
> they had not been with their tankers, or the weather had been bad, this would
> have been serious. CNN has not put up anything on their website yet."
>
> The summary is, they say in the comments, incorrect, since the F22 relies in
> computers for control so a crash of "all on-board computers" would have been
> quite a bigger problem.

Well, someone is likely to lose their job for improperly implementing
the geoid and/or datum model!