Do I need DME or ADF in an IFR-certified GPS panel?

On 6/7/05 22:35, "Matt Barrow" wrote:


"No Spam" wrote in message
...
On 6/7/05 20:40, "Peter R." wrote:

No Spam wrote:

If I have an IFR-certified GPS (terminal, not just enroute), is there
any
reason to keep a DME or ADF in the panel? (Other than being able to
listen
to am radio or tracking "non-offical" navaids - e.g., am radio
stations!)

There is no legal reason to keep those devices.

However, if you have them, they will certainly aid in situational
awareness.

Thanks, Peter,

I hadn't considering legality, but thanks for that point.

I was assuming the Garmin 430/530/480 to be the GPS unit(s), so I wouldn't
think SA could be improved by keeping the DME or ADF.

The ADF is no big deal, but definitely keep the DME. My guess is that you'll
find more GPS approaches that require DME than require ADF.



Thanks, Matt,

I had no idea that any GPS approaches existed that required DME - guess that
would make them "GPS-DME" approaches. Can you name some?

- Don
We can't all be heroes. Some of us have to
stand on the curb and clap as they go by.
- Will Rogers

No Spam wrote:
, Matt,

I had no idea that any GPS approaches existed that required DME - guess that
would make them "GPS-DME" approaches. Can you name some?

There are none, the concept is silly. If you have a GPS approach, the
DME is spurious.

"No Spam" wrote in message
...
On 6/7/05 22:35, "Matt Barrow" wrote:

The ADF is no big deal, but definitely keep the DME. My guess is that
you'll
find more GPS approaches that require DME than require ADF.



Thanks, Matt,

I had no idea that any GPS approaches existed that required DME - guess
that
would make them "GPS-DME" approaches. Can you name some?

One I do fairly often is SDA GPS 12, which is a VOR/DME overlay.
Another is Laramie (WY) Rwy 30.

Matt Barrow wrote:
I had no idea that any GPS approaches existed that required DME -
guess that would make them "GPS-DME" approaches. Can you name some?

One I do fairly often is SDA GPS 12, which is a VOR/DME overlay.

To fly this approach you need either (VOR and DME) or GPS. If you're
flying it with a GPS, you don't need a DME. It's really just for
convenience that they put them both on the same chart.

In article , Roy Smith wrote:
Matt Barrow wrote:
I had no idea that any GPS approaches existed that required DME -
guess that would make them "GPS-DME" approaches. Can you name some?

One I do fairly often is SDA GPS 12, which is a VOR/DME overlay.

To fly this approach you need either (VOR and DME) or GPS. If you're
flying it with a GPS, you don't need a DME. It's really just for
convenience that they put them both on the same chart.

Looking closer at this approach, I'm a little confused why the OVR
13 DME (CFDKH) fix exists. There's no course change. The MDA is the
same before and after. There's no timer to start. Why is the segment
after Omaha VOR not simply "2800 NoPT to PICAM"?

Roy Smith wrote:


Looking closer at this approach, I'm a little confused why the OVR
13 DME (CFDKH) fix exists. There's no course change. The MDA is the
same before and after. There's no timer to start. Why is the segment
after Omaha VOR not simply "2800 NoPT to PICAM"?



It's to let you know you're inside the circle :-)

Matt Barrow wrote:

One I do fairly often is SDA GPS 12, which is a VOR/DME overlay.
Another is Laramie (WY) Rwy 30.



It doesn't require DME if you're going to fly it GPS.
The name of that appoach is
VOR/DME or GPS 12

On 6/8/05 09:17, "Matt Barrow" wrote:


"No Spam" wrote in message
...
On 6/7/05 22:35, "Matt Barrow" wrote:

The ADF is no big deal, but definitely keep the DME. My guess is that
you'll
find more GPS approaches that require DME than require ADF.



Thanks, Matt,

I had no idea that any GPS approaches existed that required DME - guess
that
would make them "GPS-DME" approaches. Can you name some?

One I do fairly often is SDA GPS 12, which is a VOR/DME overlay.
Another is Laramie (WY) Rwy 30.



Matt,

Those approaches can be flown with only the GPS - a DME isn't required. If
you flew them without a GPS, then you'd need the VOR/DME combination.

- Don
Life is just what happens to you,
While you're busy making other plans
"Beautiful boy" - John Lennon

"No Spam" wrote in message
...
On 6/8/05 09:17, "Matt Barrow" wrote:

I had no idea that any GPS approaches existed that required DME - guess
that
would make them "GPS-DME" approaches. Can you name some?

One I do fairly often is SDA GPS 12, which is a VOR/DME overlay.
Another is Laramie (WY) Rwy 30.



Matt,

Those approaches can be flown with only the GPS - a DME isn't required. If
you flew them without a GPS, then you'd need the VOR/DME combination.


And all this time I thought the other equipment was required. Oh, well,
better to use overkill then undercut it.

Live and learn.

Point is: if you'll frequently fly approaches that require ADF, keep them
both. I have both and use them just for redundancy. I didn't know that such
redundancy wasn't required, but it didn't cost me anything other than some
minor effort.

(Didn't I see in here somewhere that a ****load(1) of NDB's are going to be
decommissioned in the next few years?)

Matt B.

(1) ****load (n), a large, indeterminate quantity.

Matt,

One I do fairly often is SDA GPS 12, which is a VOR/DME overlay.
Another is Laramie (WY) Rwy 30.


And those don't allow you to substitute the DME?

--
Thomas Borchert (EDDH)