Now that you mention it, I remember the GPS was being held within a couple
of feet of the motor cables at the time the speed readings were being
taken. Since the compass was also nearby, I had twisted the pos and neg
cables around each other a couple of times in that area, but I don't know
how effective that was. That should reduce the magnetic field but probably
wouldn't have any effect on the pulse interference.
Regards,
Harry
>Check if the problem is still present while under sail alone...
>
>You could have pulsing interference (EMPI) from electric motor. I understand
>most electric motors also transmit an electromagnetic pulse that may interfere
>with electronics... That's why cars use resistor plugs to keep noise out of
>car radios...
>
>If this is problem... One possible cure is moving the GPS fwd away from
>motor...
>Best
>One Hand Lou