"Peter R." wrote:

"Steven P. McNicoll" wrote:

"Peter R." wrote in message
...

What happens when these VFR GPS's drop reception of all but one or two
satellites? Do they instantly provide a RAIM message?


I don't know? Is it a problem if they don't?

If the pilot were using the unit for primary navigation in IMC and the unit
did not warn the pilot of too few satellites to be able to calculate
position, would that be a problem?

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.

Ron Lee