Buoy between capers island and capers reef?

So at the beginning of summer I went out in the ocean thinking I was going to capers reef but I put in my coordinates in wrong and it lead me to a buoy between capers reef and capers island, any one know what that buoy is ? Or if there’s structure under it or something? Any input will help thanks!

Y “C” FL Y 4s Priv, 28-32 ft of water, just outside the 3 mile limit!

Is it just letting me know we’re ouside 3 mile mark?

Charles Jones

Killed the Jack Cravelle and Blue fish on top h2o one September Day.