Have new HB 798 si HD and the donut is a problem for me. Part of the time it sits across from a Lowrance LCX113 c HD. I do lot of trolling for catfish and crappie at less than .5 mph. The Lowerence is better at direction but in less than year after I purchased a $2500 Lowrance unit it is obsolete and no updates. I like my HB very much but do wish we could at least improve the direction problem. The HB knows where it is and where it is going just has delay in getting it on screeen. The recorded track is the same and very accurate on both units. My Minn Kota trolling motor knows where it is within 5 feet. Check one again a buoy.
Yes keep thread going we need fix form Hummingbird.