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.