On Wed, 01 Dec 2004 19:03:59 GMT, "Glen \"Wiley\" Wilson"
wrote:

Actually, I think that's an excellent idea, but I rolled my own. See
the crass commercial message in my sig. :-) I've been asked to
extend the program with an intelligent anchor watch. Something
that would suppress spurious alarms when the gps loses lock for
a few seconds. I'd never have thought of that myself, but it's a
fact that I've never had a complete night without my gps deciding
Scotty beamed me a few hundred yards in some random direction.
Which causes OziExplorer's otherwise excellent anchor watch to
start screaming.

If your GPS produces a spurious jump when it loses lock, I think a new
GPS is in order. I have been using GPS receivers for 15 years, and
have never had anything like that happen.

I have seen them keep the last readout, blinking the display. The
blinking wouldn't show up on the NMEA, I suppose, but the unchanging
readout would fail as an anchor alarm if you actually were adrift.

What kind of reciever did what you describe?

Another thing. Where are you anchoring that it loses lock nowadays,
with 24 sats active? When I had a 6-channel receiver it would lose
lock all the time in a Manhattan bus, but never on the boat.

At that time "Selective Availability" would have made it useless as an
anchor alarm, but that is a separate issue, still long behind us. WIth
luck it will stay that way.

Rodney Myrvaagnes J36 Gjo/a

The destruction of the World Trade Center was
a faith-based initiative. -- George Carlin