Quote Originally Posted by mduncan62 View Post
I've had the 50 channel, and it did nothing to help with the donut. so 2ft at 1mph or better might be correct.

And to what doublegobble said, I've pulled up to a waypoint with both Low and HB and I'd be willing to be that it's been within a foot or two. Some of the waypoints I can tell you for sure it's within a foot or 2 because I know how I marked it.

Accuracy really isn't the problem to me at all.
CP is probably better at answering a question like this because he is more versed in actually how GPS works....BUT...

I really don't think the "Donut" has anything to do with the accuracy of the antennae...

I have the discontinued AS GHRA (High Accuracy) 50 channel antennae and I have still experience the "Donut" at less than 0.5mph....

It is my understanding that the "boat directional tracking icon" is a calculation of algorthms...(programmers lingo)

According to Greg...(Greg..I hope I can quote you here) ..."The powers that be at HB decided that boat directional tracking at speeds of less than 0.5mph was not neccessary"...

Therefore. this "Donut" issue is nothing more than HB deciding is wasn't worth the extra money to pay their programmers to write adequate code into the software to do what Lowrance and Garmin products do without question....

Rickie (an almost satisfied HB owner)