Bush Prepares for Possible GPS Shutdown

Larry Dighera wrote:

So, you're saying there are no GPS approaches whose missed approach
procedures rely upon GPS?

Dunno about that, but according to an article in the most recent AOPA Pilot, you
can't shoot a WAAS approach without some other navigation system (like a VOR
glide slope receiver) in the plane.

George Patterson
The desire for safety stands against every great and noble enterprise.

G.R. Patterson III wrote:



Larry Dighera wrote:

So, you're saying there are no GPS approaches whose missed approach
procedures rely upon GPS?

Dunno about that, but according to an article in the most recent AOPA
Pilot, you can't shoot a WAAS approach without some other navigation
system (like a VOR glide slope receiver) in the plane.

How does one get to the next approach w/o GPS if the missed approach on the
GPS approach requires a GPS?

This isn't just a "GPS shutdown" question, but a more generic "dealing with
failure" question. Still, one is legal with a single VOR and VOR
approaches can have VOR-based missed approaches.

- Andrew

On Thu, 16 Dec 2004 21:35:49 GMT, "G.R. Patterson III"
wrote:

Dunno about that, but according to an article in the most recent AOPA Pilot, you
can't shoot a WAAS approach without some other navigation system (like a VOR
glide slope receiver) in the plane.

I did not see that article, and cannot locate it just now. But I don't
understand the logic that would imply that for a TSO146 GPS unit.

Can you elaborate?


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)

Ron Rosenfeld wrote:

I did not see that article, and cannot locate it just now. But I don't
understand the logic that would imply that for a TSO146 GPS unit.

Can you elaborate?

Well, I found that one and couldn't find the reference I thought I read. But I
did find another article that contained this "Currently, two manufacturers of GA
avionics — UPSAT and Chelton — have WAAS-certified receivers that can be used
for 'sole-source' IFR navigation, meaning no other navigation systems are
required on the aircraft. UPSAT expects to receive certification for vertical
navigation ('glideslope') within two months. Other manufacturers will be
offering WAAS receivers soon." That states I was wrong.

George Patterson
The desire for safety stands against every great and noble enterprise.

On Fri, 17 Dec 2004 15:23:15 GMT, "G.R. Patterson III"
wrote:



Ron Rosenfeld wrote:

I did not see that article, and cannot locate it just now. But I don't
understand the logic that would imply that for a TSO146 GPS unit.

Can you elaborate?

Well, I found that one and couldn't find the reference I thought I read. But I
did find another article that contained this "Currently, two manufacturers of GA
avionics — UPSAT and Chelton — have WAAS-certified receivers that can be used
for 'sole-source' IFR navigation, meaning no other navigation systems are
required on the aircraft. UPSAT expects to receive certification for vertical
navigation ('glideslope') within two months. Other manufacturers will be
offering WAAS receivers soon." That states I was wrong.


This latter stuff you quote is what I thought also. As the owner of a
CNX80, I did not think other equipment was required (although, of course,
it is present).

And the vertical navigation to which your article refers has been available
on the CNX80, as a free, factory-installed upgrade, since the beginning of
October. Mine is going in next week for that upgrade process.


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)