GARMIN BLUECHART MUS015R LAKE SUPERIOR With True Enhanced Performance. Latest Technical Development. MUS015R Covers:Lake Superior and northern Lake Huron are covered in detail for the U.S. portion from Duluth through Alpena, including Crooked Lake, Burt Lake, and Mullett Lake in Michigan; and for the Canadian portion from Thunder Bay to Tobermory, Ont.MapSource BlueChart serves up the best offshore cartography around and works in seamless integration with a wide range of Garmin products. Features Include:Chart-specific information, […]