I used to sail to BI about 6 times a year and fished that spot often. Its nice cause you can walk there from The Great Salt Pond (anchorage) when you get board with Gracies. I used to row a dingie over to the narrow beach between the pond ad BI state beach then just a short walk to ballards and the breakwater. Good fish but I never got a trophy there. I once saw a guy walk off with a fish whose tail was still touching the rocks despite the fact he had it draped over one shoulder. Right place , right time , wrong pole!!
I love Block Island. Sail out in 4 to 6 hours (sometimes more) and anchor in the pond for two weeks at no charge!! Launch service from Oldport, a guy who sells fresh baked pies to you right on the water (honest) , restaurants and bars , shops for the ladies and fishing everywhere.
Oh BTW , the give away is the exposed sand along almost the entire length on the inside of the breakwater. Not many places like that.