The game's world is larger than in any of the previous games, and is available for exploration in a seamless fashion, without transitions or loading between ship navigation, swimming, and exploring the land. Much of the Caribbean Sea can be physically explored, including three full-fledged cities (Havana, Kingston, and Nassau) as well as smaller settlements and uninhabited islands. The protagonist can now hunt animals, fish, and uncover treasure maps. Early in the game Edward gains access to the Jackdaw , a ship that can be outfitted, upgraded, and used in naval battles. It is also possible to recruit crew members for the ship.