IFR GPS question

Robert,


1) Does a GNS-430 have DME built in? i.e. If I don't upgrade the GPS DB
can I still fly a VORDME approach off the 430's VOR? (I'm trying to
decide if I should keep my DME)

No, it doesn't have a DME built-in. However, if the DME is a waypoint in
the database (not the airport the DME is at, but the DME itself, which is
the case for most, if not all), then you can legally substitute the GPS
distance readout for the DME. You should still be able to fly a VOR
approach with the 430 without a database, but obviously not a VORDME, if
you substitute the DME in the way described above, since the DME part
would depend on the database.

--
Thomas Borchert (EDDH)

Thomas Borchert wrote:
Robert,


1) Does a GNS-430 have DME built in? i.e. If I don't upgrade the GPS DB
can I still fly a VORDME approach off the 430's VOR? (I'm trying to
decide if I should keep my DME)

No, it doesn't have a DME built-in. However, if the DME is a waypoint in
the database (not the airport the DME is at, but the DME itself, which is
the case for most, if not all), then you can legally substitute the GPS
distance readout for the DME. You should still be able to fly a VOR
approach with the 430 without a database, but obviously not a VORDME, if
you substitute the DME in the way described above, since the DME part
would depend on the database.

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.

-Robert

Robert M. Gary wrote:
Thomas Borchert wrote:

Robert,



1) Does a GNS-430 have DME built in? i.e. If I don't upgrade the GPS DB
can I still fly a VORDME approach off the 430's VOR? (I'm trying to
decide if I should keep my DME)

No, it doesn't have a DME built-in. However, if the DME is a waypoint in
the database (not the airport the DME is at, but the DME itself, which is
the case for most, if not all), then you can legally substitute the GPS
distance readout for the DME. You should still be able to fly a VOR
approach with the 430 without a database, but obviously not a VORDME, if
you substitute the DME in the way described above, since the DME part
would depend on the database.


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.



It is not necessary to have a current database for a VOR/DME approach as
long as you verify that the data you do have is correct. So you're good
to go with a 430.

Robert,

I assume I can slave it off the 430's nav.


Shouldn't be a problem.

--
Thomas Borchert (EDDH)

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.