USS CONSTITUTION, the world's oldest commissioned warship afloat, promotes the United States Navy and America’s naval heritage through educational outreach, public access and historic demonstrations, inport and underway. The ship is open for free guided tours throughout the year. Each tour is narrated by several of USS Constitution's active-duty United States Sailors and consists of four stations through the ship's top three decks, with tours beginning every half-hour from 10:00 a.m. to 3:30 p.m. Each tour can accomodate approximately 80 people.