On Thu, 04 Jan 2007 07:22:51 -0800, Sam Spade wrote:

Ron Rosenfeld wrote:
On Thu, 04 Jan 2007 05:03:10 -0800, Sam Spade wrote:


I was actually asking all of the above. ;-) My take on it would be the
case of advisory vertical guidance on an LNAV-only approach with the
"approved operator" note cannot be used as a DA unless you have a letter
of authorization.


When I spoke with the local FSDO, which was shortly after the advisory
vertical guidance became available, that was their take also. But they
were not sure what the eventual status would be for Part 91 small a/c
operators.
Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)

As a practical matter it is much to do about very little ;-)

When you arrive at MDA using the "advisory" vertical guidance (which,
according to my contact at Garmin is more than advisory, in the sense it
is primary vertical guidance and assures stepdown fixes) you are at the
same place as the approved operator with DA would be. So, if you see
the right stuff you land, if not you can either level off at MDA and go
to the MAP or just missed immediately.

If the feds eventually say you will use the DA concept then you would
have to miss immediately if you did not have the required visual references.

Which would be a shame since, in many instances, the intersection of the
generated glide path with the MDA may be further from the AER than the
minimum visibility. e.g. at EPM it is 1.3 mi from the MAP but the
visibility minimum is 1.0 miles.
Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)