compass?

Is there a compass that actually works when installed in a car. I keep
buying these floating in water ones and I can antually see the position
change as I move it around in the car and they always fall off after about 2
weeks anyway.

What products are there to provide compass directions reliably and withstand
the heat of being inside a care.

thank you

 

If you get a liquid filled compass, complete with the adjustment screws (+
instructions) and have access to true N-S, E-W roads or tracks on which to set
it up, it should be OK. Mine took me about 30 minutes of fiddling with the
screws and re-checking, before I was satisfied with the adjustment. After that
it was fine until the next summer's heat screwed up the liquid fill.

I now use a Garmin GPS12 - it's OK providing that I'm moving or have recently
come to a halt.

 

Good advice if you want accuracy.

On the other hand if it's just a rough idea of direction you want when
lost in one of those spaghetti twisted streets in a residential
subdivision, a cheapo will serve. Two things to watch are heat and
location. I keep a good sized spherical compass in that little storage
container in the armrest. I only take it out when i need it and then I
jam its suction cup against the windshield directly above the
instrument panel so it's in my line of sight and away from magnetic
influences of the instrument panel.