IFR GPS question

Neil Gould wrote:


Well, *all* restrictions go away in an emergency

Yes, but irrelavant to the discussion.


, so that doesn't really
address the root of the problem.



You missed the root of the problem completely.







The reason why you can't file such an
alternate is that you don't have the minimum information required to
safely fly that approach.




No, that's not why. As a matter of fact you do have all the
information. The reg is there to provide redundancy.

Recently, Newps posted:

Neil Gould wrote:

The reason why you can't file such an
alternate is that you don't have the minimum information required to
safely fly that approach.

No, that's not why. As a matter of fact you do have all the
information. The reg is there to provide redundancy.

Oh? The question Robert asked was whether he could legally fly VORDME
approaches if he removed his DME after installing the 430. I thought
Thomas Borchert gave a very good reply, which seemed clear to me. I'm sure
that my IFR training, which is not very deep, may lack some practical
point about this, as I don't see how a reg that requires you to specify
the equipment on board could allow one to file an alternate that requires
equipment that you don't have. If I have that wrong, I would appreciate
your clearing it up for me.

Neil

Robert M. Gary wrote:

That was my fear. I don't plan on keep the DB up to date all the time
and I still need to be able to fly VORDME approaches. I guess I'll need
to keep my King DME. I assume I can slave it off the 430's nav.


Probably can. I have a 480 and it is driving my King DME.

Jose wrote:
...then you can't legally use the alternate

Not quite. You can't file that airport as an alternate if you need the
GPS to get in there. However, once you actually =need= an alternate,
that restriction goes away. It's a restriction on filing, not on flying.

Jose
An "alternate" only exists for filing purposes. After that you're
just changing your destination. The minimums, equipment requirements,
etc... are the same.

Neil Gould wrote:
Recently, Jose posted:

...then you can't legally use the alternate
Not quite. You can't file that airport as an alternate if you need
the GPS to get in there. However, once you actually =need= an
alternate, that restriction goes away. It's a restriction on filing,
not on flying.

Well, *all* restrictions go away in an emergency,

Going to an alternate isn't an emergency.