I have a feeling we have to thank D.O.T. but it may be another govt dept, but somebody has put some big yellow Buoys around Narimba Cay.
They are marked, "Austin Cove Nature Reserve speed limit 5 knots". If you don't go inside this area, you won't hit the Cay.
Here's my tracks from today, when I did hit the Cay, and sailed back to one of the buoys to see what it was. Then a bit later gybed around it, so this locates the point on my tracks.





There's another buoy closer to the point, and another two further along, don't do as Fangy did, and mistake the far side ones as the near side ones!