Gerald Sylvester wrote:

Ron Lee wrote:

"Peter R." wrote:

Ron Lee wrote:

You should note that if you lose lock (too few satellites) then your
display will start flashing (or portions of it). That is not RAIM
which determines if you have a signal error.

Just to clarify, are you saying that a *VFR* GPS's screen flashes
when the
GPS loses the required number of satellites for position calculation and
that error is not a result of built-in RAIM?

Portions do such as position. Take your favorite handheld and look
at various displays. Note that some will flash until you get a solid
GPS lock.


my handheld keeps updating and displaying as though I kept going
straight ahead at the same exact speed and course as when it
lost the lock. So there is NO warning at all.

Gerald

What model is this? I've owned a Garmin 195 and Magellan 500 and both
started flashing if the lost the signal. I had a older non aviation Gps
and as I recall it did not flash when it lost signal. From my
experience and that of other pilots I've talked with all the aviation
GPS tell you when you lost signal. By the way how does your unit update
if you have lost the signal? I can see it freezing and displaying the
same info but how would it update?
John