Radio island is a NC shore dive. Expect 3 to 6 ft visibility. Only dive-able at high-slack tide. Tropical fish are seen during the late summer months into October. Beware of boat traffic if you venture off the jetty. Beware of stinging corals & occasional jelly fish. Gloves are a must and wetsuits are recommended to deal with sea urchins and sharp rocks and stings. It really is a great quickie dive for those of us in NC. See new stuff almost every time.