purple_stars wrote:
Gary wrote:
[snip]

The jamming of GPS is possible and used. The challenge is long range
jamming or continuous jamming. It takes a great deal of power to jam a
GPS that is any distance away. It also needs to run continuously to
really screw you up. Once the jamming stops, or you get too far away,
it just locks back on. The jamming will likely be obvious. You just
won't get a signal. The better way of doing it is not jamming but
deceiving the GPS so it looks like it is working but leads you (or a
missile) away from the intended destination or target. This would be
fairly obvious on a yacht at sea.

In other words, don't worry about it. The 90% of the time you are on
your boat sitting at anchor it won't matter. The rest of the time
nobody cares to jam you.


i never said i was worried about it. i never said i thought anyone was
going to jam me. i never said i was going to high latitudes where i
thought geomagnetic storms would affect me. all i did was answer my
own question which was "can GPS fail ?". to my surprise, yeah, there
were some cases where it has failed. end of story.

GPS is a great tool, my primary navigation tool and i would assume the
primary navigation tool of anyone on a boat. i can't imagine any
reasonable situation where it would ever fail for me. but that doesn't
make understanding when it can fail some kind of crime, it doesn't make
me into some kind of anti-GPS zealot.


Don't forget that tinfoil in your ball cap.


i don't understand why you are being rude to me, i've not done anything
to you.

The ball cap comment was a joke aimed at Da Kine who seems lack a sense
of humour as well.

My comments on jamming are not intended to be rude.

You are being a bit sensitive.

Sorry.