Say Altitude.

You're right. AIM 1-1-20(a)(8) tells us that we should not use GPS altitude.
When WAAS is in common use this will probably change.

I was not using the GPS for altitude. Always use the altimeter
The altimeter was showing 7000.
ATC was showing 6700
Gps was 7060. However when I changed altitude the gps stayed frozen at 7060.
Hank

"Hankal" wrote in message
...
You're right. AIM 1-1-20(a)(8) tells us that we should not use GPS
altitude.
When WAAS is in common use this will probably change.

I was not using the GPS for altitude. Always use the altimeter
The altimeter was showing 7000.
ATC was showing 6700
Gps was 7060. However when I changed altitude the gps stayed frozen at
7060.

Aren't controllers supposed to tell you to turn off your altimeter and go to
VFR when an error that big is detected?

"William W. Plummer" wrote in message news:ctncc.82738
I was not using the GPS for altitude. Always use the altimeter
The altimeter was showing 7000.
ATC was showing 6700
Gps was 7060. However when I changed altitude the gps stayed frozen at
7060.

Aren't controllers supposed to tell you to turn off your altimeter and go to
VFR when an error that big is detected?

They can tell you to stop altitude squawk if they want. They have no business to
tell you to "go VFR"

Ron Natalie wrote:


They can tell you to stop altitude squawk if they want. They have no business to
tell you to "go VFR"

When was the last time you had a controller ask you to turn off your altimeter? ;-)

wrote in message ...


Ron Natalie wrote:


They can tell you to stop altitude squawk if they want. They have no business to
tell you to "go VFR"

When was the last time you had a controller ask you to turn off your altimeter? ;-)

I didn't repeat that error. I did have them tell me to stop altitude squawk. After three
weeks on the ground at VKX due to 9/11 hysteria, they let us flush out of there. We
got checked over by the local PG County cops and then given special void time clearances
out of there. As I broke ground I realized something was seriously wrong (static system
plugged). Fortunately, it was severe clear. I called ATC and asked what the mode C
was reporting (just for jollies), they said 100 feet. Told them that was in error but I really
didn't know where I was but figured about 2000'. After they verified I was in no danger
of crashing, they just told me stop altitude squawk and procede on course.

The only fun was figuring out how to tell when I was below 87 knots so I could drop the
gear (did a quick calculation with the GPS groundspeed and the AWOS winds which were
fortunately 10 knots right down the runway).

I've never been told to turn off my altimeter!

Rich


William W. Plummer wrote:
"Hankal" wrote in message
...


Aren't controllers supposed to tell you to turn off your altimeter and go to
VFR when an error that big is detected?

Rich wrote:

I've never been told to turn off my altimeter!

I would if I could only find the switch.

"Rich" wrote in message ...
I've never been told to turn off my altimeter!

I've not even got an altimeter off switch. I guess I'll just have to smash the front
of the instrument.

Aren't controllers supposed to tell you to turn off your altimeter and go to
VFR when an error that big is detected?


The controller requested I turn off mode C.
In 25 miles he asked to turn back on.
Everything went fine from there on.
I could not have accepted VFR since I was in IMC condition.

William W. Plummer ) wrote:

Aren't controllers supposed to tell you to turn off your altimeter
and go to VFR when an error that big is detected?

Mode C is not always mandatory when flying IFR, at least in the US's
Northeast.

Last spring, I was returning from the AOPA Fly-In when I discovered I had a
mode C problem with my altimeter. The weather leaving Frederick, Maryland
(US) that day was low IFR, a really crappy day for a fly-in.

Upon calling for my clearance, I mentioned to the CD controller that I
suspected my mode C would not be functional. He had me wait while he
contacted others (perhaps the center controllers?). A moment later he gave
me the clearance and stated that I would be responsible for calling out my
altitude throughout the flight.

I then departed and as I was told, the departure controller had me call in
with my altitude every few thousand feet while climbing. From that point
on, I would receive a periodic "Cessna XXX, verify level at 9,000 feet"
call. I was impressed with the service.



--
Peter












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