While only visible for a second in some earlier footage of the game, the USS Constitution is actually a full-on location in the full game, rather than a simple piece of environmental set-decoration. On top of being in the game, it looks like it has really upgraded with time.
For those who are unfamiliar with the ship, USS Constitution is a wooden-hulled, three-masted heavy frigate of the United States Navy, named by President George Washington after the Constitution of the United States of America. Retired from active service in 1881, Constitution served as a receiving ship until designated a museum ship in 1907. In 1934 she completed a three-year, 90-port tour of the nation. Constitution sailed under her own power for her 200th birthday in 1997, and again in August 2012, to commemorate the 200th anniversary of her victory over Guerriere.