Hi,
I discovered a problem while editing my waypoints (basically creating group names) using the new 6.180 release on my 998c. Basically, the Waypoint Management Feature is accessed by opening the Waypoints, Routes, Tracks menu under the NAV column selection.
What I am seeing is that when selecting a waypoint (from my waypoint list), and that waypoint is near a river structure (displayed on the little map of the waypoint) and the scale of that map is 20 sm, 50 sm, or 100 sm, the river structure part of that map display oscillates (flashes or whatever you want to call it!). Note that the default display size for the Waypoint Management Map is 0.5 sm. Also note that this oscillation only occurs with LakeMaster chips (I am seeing the problem w/ MN 2.0 and WI 2.0) and not my Navionics Platinum North chip 2011. I cannot say which side of the fence (HB or Lakemaster) this problem is on (That's for the HB and/or Lakemaster Gods to figure out!!!). The issue does not appear to be a deal breaker but more "cosmetic" (as far as I can tell).
Feel free to contact me w/ any further questions.
Take care,
Roger