I recently did some sonar chart live activity using my chart plotter and nav+ chart card to gain some new contours for an area in the kiawah river that had previously had 0 contour lines. I put those into an update and BAM, now those chart updates are live for everyone to update their charts. Pretty neat to be able to collectively stay up to date with the new chart info out there.
The pics aren’t showing up. What head unit are you doing this contour charting? Sounds awesome for small lakes, ponds, and reservoirs that have no prior bottom digits!