Garmin BlueChart g3 Vision HD - VUS510L - St. John - Cape Cod - microSD/SDBlueChart g3 Vision HD VUS510L St. John Cape Cod microSD SD Coverage: Detailed coverage the East coast of the U. S. and Canada from Cape Cod to St. John, NB, including Boston, MA, Portsmouth, NH, and Portland, ME, as well as the Kennebec R. to Augusta, ME and the Penobscot R. to Bangor, ME. Coverage also includes Martha's Vineyard, Nantucket Island, Grand Manan Island, Mt. Desert Island, and Calais, ME as well as St. Mary's Bay and Yarmouth, NS.