This boat line offers ferry service, whale watches, sightseeing and chartered boats on Boston Harbor. Whale watches take about 3 hours on high-speed catamarans. Sightseeing options include a 45-minute U.S.S. Constitution cruise, a 90-minute historical tour of Boston Harbor, or a 90-minute sunset cruise. Ferry service includes commuter runs from waterfront suburbs Salem and Hingham, Boston to Cape Cod service, a four-stop inner-harbor city network and service to the Boston Harbor Islands State Park. Ships accommodating up to 550 people are available for private functions.