John
I had similar problems while flying in The Pacific Northwest. There is
a number of distinct spikes in the trace because of lost GPS signal
from the satellite. It happened couple of weeks ago.

Robert, OR

On Jun 9, 8:06*am, jcarlyle wrote:
The last several weeks I've experienced (near Philadelphia) a lot of
"GPS Wait" messages from my Cambridge Gps- Nav. At least 3 other
pilots at Philadelphia Glider Council have also reported having
problems with their GPS systems.
-John