From the GNS430 Manual:
[pg71] Note: When viewing the map page, note that the final course segment
is displayed in magenta...and a dashed line extends the course beyond the
MAP. The dashed line is provided for situational awareness only and should
NOT be used for navigation. Follow the published missed approach procedures.

Also:
[pg72] 2. Follow the missed approach procedures, as published on your
approach plate, for proper climb and heading instructions...

Seems that they have themselves covered although I am assuming the GNS530
manual has the same language as the GNS430's. I don't think the GNSx30 boxes
are allowed to use their altitude for anything official until they get the
WAAS upgrade anyway. If they put a simple note as a warning, then they would
have to put similar warnings for other operations (e.g. warning the pilot to
descend to the proper altitude when it goes into OBS/SUSP mode during an
approach with a holding pattern).

As other peopl have said, it's up to the pilot. The boxes are in compliance
with all TSO-c129 requirements. The issue should be directed at the FAA.

Marco Leon


"Wyatt Emmerich" wrote in message
...
My flight instructor is quite upset. He says every single one recurrent
pilots is making the same potentially fatal mistake. When they reach MDA
or
the MAP, they hit the OBS/SUSP button as soon as it lights up. The Garmin
530 immediately paints a magenta line to the hold waypoint. Unfortunately,
often the full approach plate lists specific altitudes to which to climb
before making this turn. The instructor says eight out of eight of his
recurrent pilots are just hitting the SUSP button as soon as it appears
and
heading to the hold, which could take them smack dab into terrain or
towers.
We look up in the Garmin manual and it says nothing about making sure to
reach the proper altitude before hitting the OBS/Susp button. His point is
this: Garmin should have some type of display message that warns the pilot
to reach the proper altitude before turning to the hold fix.





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