Classic Harbor Line: Boston’s Classic Style Charter Boat and Tour Boat Fleet At Classic Harbor Line, we are dedicated to providing the most impeccably luxurious and hospitable sailing experience in Boston. Our guests can look forward to the privilege of being escorted on a breathtaking excursion aboard the most elegant sailing vessel in Boston Harbor, the schooner Adirondack III, or a relaxing cruise aboard the motor vessel Northern Lights. If you are a first time visitor or a seasoned local, an excursion aboard one of Classic Harbor Line’s yachts will provide you with a new perspective on the city of Boston.