I've noticed that the buoy icons on the chart are not located precisely as one would expect. When in full zoom in on the chart, the buoy icons are properly located to their actual position outside. However, when you zoom out on the chart, the buoy icons are somewhat askew and are not located or look very precise.
And I have figured out why.
The location of the actual buoy is co-located to the TOP of the buoy icon. Not the BOTTOM. This seems very unintuitive and can be confusing especially when quickly glancing at the chart and not realizing that the buoys are more located to one direction than what is depicted.
I advise to shift their actual location to be co-located to the BOTTOM of the buoy icon on the chart.