With a running aground thread active and a cruise ship aground I am also thinking about a presentation I am doing for the local Blue Water Sailing group. I am calling it "Lessons Learned - By an Instructor."
One lessons I have learned is a preference for official / government publications. I am using these images of Atkins Reef in Trincomali Channel between Saltspring and Galiano Islands just south of Walker Hook to illustrate my point. The PNW folks will know it.
A popular Android charting app shows it as:
The official Canadian Hydrographic Service, chart 3442 show it as
Notice the aid to navigation; it is a port bifurcation standard daybeacon.
This is a photo of a boat (skippered by acquaintance who shall remain anonymous) when they misjudged the reef, even seeing the aid the navigation.
I have sent a notice to the app company indicating the missing aid. On a previous edition it was show as a "red lateral", also wrong.
If you see an aid to navigation that you are not expecting, what do you do?