Sorry to be the bearer of bad news but this is not an isolated problem. I have just finished having a scrap with Navico
about my 3150 wind gear
doing the same, erratic wind direction at any speed.
Asked my local chandler which is the largest Navman dealer here, he then when on to tell me that a large number (30) of the units he sold were faulty. He had told Navman reps about this and they refused to acknowledge that there was a general problem.
My correspondence with them here in Aust. was far from helpful, at first it was suggested that the wiring may be at fault, then maybe a recalibration might do the trick, then upon finding out that I purchased the unit on ebay from Canada
, which in turn sent it from their agent in Hong Kong
I was told that they would not homour the guarantee in Australia
because I had not purchased it in Australia
. For any service
I would have to send it to New Zealand
. This I subsequently did and 3 weeks later a new Northstar unit arrived by courier. Well done New Zealand
, as for my Australian agents, neveer again will I buy Navman.