Stan Prevost wrote:

Not sure of your exact meaning of "ad-hoc" holds, unless you mean
unpublished holds.

Unpublished, on-the-fly, unscripted, given by ATC to slow traffic, etc.
Actually unpublished might not be the correct term either, since as far as
I know the GNS430W does not have en route holds (holds that are published
on en route charts) in its database.

I don't see any problem with the 430 in performing holds
on any course at any fix or at present position. It won't provide any
positive course guidance except on the inbound leg at any hold, published or
unpublished.

But once the GNS430 is upgraded to the WAAS feature-set, it appears (based
on the sim) that the unit will be able to provide positive course guidance
completely around holds that are published on terminal charts. That is
what I discovered when playing with the GNS430W sim.


--
Peter