Exploring Maps and Charts of Mackerel Cove, Swan’s Island, ME Chart View Map View Explore the RegionExplore the State Local Goods & Services See All Nearby Wilbur Yachts Boatbuilding, Repairs & Instruction Clark Point Gallery Art Galleries Hamilton Marine - Southwest Harbor Boating Supplies, Equipment & Gear Billings Diesel & Marine Boatbuilding, Repairs & Instruction John Williams Boat Company Boatbuilding, Repairs & Instruction