[TowerTalk] How accurate are iPhone Compass apps?

[Kevin Normoyle]

interesting. I didn't realize that.
My Garmin Vista H has electronic compass separate from GPS. (not all Garmin do)
so it has some kind of magnetic sensors.

I know I can turn it on and off separately, to save battery power.

I guess I'm not sure why some have additional sensors if it's possible to be as 
accurate, with no movement, from GPS.

-kevin
ad6z

On 1/4/2012 10:18 AM, K8RI wrote:
> My Garmin portable knows which way it's pointed when it's turned on
> setting on the desk although it may take it  minute.
> All of them I've used at most required a movement of no more than a
> couple of feet.
> With those you could lay a yardstick on the ground and just move the
> portable along it. Adjust the yardstick until you get either N or S when
> moving the GPS.
>
> 73
>
> Roger (K8RI)
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