In article ,
"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?


When my hand held Garmin loses enough sats for position calculation, I
receive an alarm on the unit (both visual and audible).

I believe that RAIM performs a checksum to verify the integrity of the
data received from the sats. Hand held devices are indeed missing this
functionality, but it makes no difference for enroute, in my opinion.


JKG