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Not clear (to me at least) is WHY they so clearly lost situational
awareness. Based on when they descended to MDA,and when and how they flew the missed, they obviously thought they were someplace other than where they were. But why? Missing the fact that they autosequenced over the NDB might have caused some confusion when flying the hold, but once inbound, both the GPS (if they were using it) and the primary nav (presumedly tuned to the LOC frequency) would both be showing dme to MAP. The gps would count down to zero, the primary nav would go down to 1. How could either relying on a potentially unreliable GPS OR missing the autosequencing have caused them to to fly several miles PAST the MAP thinking that they had not yet reached it? IIRC, they descended to MDA several miles PAST the MAP. They used the MAP as the FAF, and seemed to fly a picture perfect approach thereafter. How could misreading the GPS or NAV cause this?? "Dave S" wrote in message news ![]() The KLN 90B gps has a small moving map in its panel display. The NTSB report alluded to the standard practice was for a track up orientation. Given that the moving map screen is fairly short vertically, maybe half its width, in the track up presentation it may not have been as obvious that they had overflown their waypoints... Of course, from an armchair quarterbacking perspective, almost all of my inflight GPS experience has been behind King products, the KLN 89B, -90B and KLX-135, and didn't seem to have a problem with the display or depictions. The display was also not on the center console between the pilots, facing up (as opposed to on the main panel). Dave Peter wrote: "Jim Macklin" wrote PDF from NTSB http://www.ntsb.gov/publictn/2006/AAB0601.pdf Having read a fair few reports of aircraft flown by professional crew, perhaps commercially, it amazes me how many do not have what one would call a moving map GPS. Unless I am missing something obvious, this sort of thing should not happen if the pilot has a picture showing his position relative to the rest of the place. |
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