Very true Orion good advice.
I still think that the marker is wrong though. I was using a compass when I was over there and the position of the marker would tell you, if using Red South/West logic, to pass directly over the hazard. The chart shows it quite a bit further over than it actually is. The marker itself is in a good location, as it marks a rock, it is just the wrong color in my opinion.
The end result of course is as always:
Local Knowledge Required