Noel, you can't miss it
It's near the Yacht club's race buoy out in the "middle" - south of the barge mooring. It's a very bright yellow buoy with a wind meter and some other instruments and an antenna. Size-wise it's a little smaller than a lit navigation buoy. Ross is right, you should be able to see it from the lighthouse if your looking across to Perryville.
Manny