On Wed, 6 Mar 2019 00:23:00 +0000 (UTC), Claus Aßmann
wrote:

John B. Slocomb wrote:

I remember back when we lived on the boat the GPS would sometimes
measure the altitude at 10 feet which was about twice the height above

That's why even most GPS based cycle computers use barometric pressure
for altitude -- GPS is pretty bad for that.

"Note: please read the netiquette before posting. I will almost never
reply to top-postings which include a full copy of the previous
article(s) at the end because it's annoying, shows that the poster
is too lazy to trim his article, and it's wasting the time of all
readers."

If you don't care to answer then just don't bother. It is not that you
would be missed.

--
Cheers,
John B.