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Old February 11th 06, 10:41 PM posted to rec.aviation.ifr
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Default GNS430 Without the IAF

As the others have said, scroll the full approach fpl to AMEBY, the
Direct, Enter, Enter.

This illustrates a general point - one should not be too quick to
activate "vectors-to-final" the instant one gets a vector. Reality is
that one isn't always vectored to a gate just prior to the FAF. You
can always select FAF, direct,direct,enter,enter to make the
intermediate leg activate when it turns out that is really where you
are going. Until then, leaving the full approach active leaves more
options, like the above.

Another local example is coming into LVK from the Modesto area. You
get vectored onto the localizer outside FOOTO, with final instructions
to cross FOOTO at or above xxxx. But if you activated VTF, FOOTO is
blown away - and FOOTO is the one thing you really wanted from the GPS,
since the localizer becomes primary for guidance.

I do it in the manner Tim suggested. Activate the full approach from
TRACY, select FOOTO, direct, enter, enter. Then go to OBS mode, setting
the OBS to 255 the inbound course of the extended localizer centerline.
Crossing FOOTO, go to leg mode.

Ed Williams










Jerry wrote:
Hello,

Here's a situation that keeps coming up: I'm coming home to SQL
and want to fly the GPS30
approach. Like many GPS approaches, this one looks like the letter
"L". The corner of the L
is AMEBY, and 5 miles later after that is the FAF, CUZUP.

AMEBY is not an IAF, but that doesn't stop ATC. Typically, from 40
miles out they say
something like "fly heading XXX when able direct AMEBY". Then when I'm
close, they'll
say "Cross Ameby at or above 3200, cleared for the San Carlos GPS30
approach".

Since AMEBY is not an IAF, it's not one of the GNS430 approach
choices. Which leaves
Vectors-to-final, but when you choose that, the guidance to AMEBY goes
away. Well, I think
the icon remains on the moving map.

The only solution I could think of was to cross AMEBY, and then
activate Vectors-to-Final.
When already on the approach, and already dealing with the precise
flying required on the approach.

Anybody got a better way?

- Jerry Kaidor