Experience the same thing with my GPS in my work truck about a couple of times a month. I forget which thread I discoursed on the matter, probably long-windedly, but the point is, or should be, that GPS is an offshore/over the horizon navigation tool. It is not appropriate, nor is any electronic navigation equipment with the exception of radar, in a piloting situation. Use of it on those situations calls for an ample supply of Lloyd's Open Form on hand.(g)
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.