Created by Ubisoft Singapore, the game's naval combat will be integrated into the main campaign, and will feature in numerous side-quests, as well as contract missions.
During naval combat scenarios, players must steer, brace for damage, avoid cannon fire, command the crew, and destroy enemy fleets using dynamic tactics.
Tactics change based on the damage taken to the ship and its weapons, as well as differing weather conditions.
Fighting under a shroud of fog, for example, forces players to hunt down enemy vessels individually.
Starting with regular round cannon shots, new artillery types are unlocked through the game's economy system, including shotgun-style Grape Shots and the devastating Heat Shot, which blows rival ships to pieces.
Users can also destroy vessels by ramming into them, or by boarding them as Connor, assassinating members of the crew in hand-to-hand combat before making an escape.
Ubisoft Singapore has also created a 12-scale ocean simulation engine, increasing the wind speed and size of waves as the action intensifies.
Copyright: UbisoftOfficially unveiled in March, Assassin's Creed 3 will take place over a 30-year period in colonial America beginning in 1777.
It features a brand new lead named Connor, the offspring of an English father and Native American mother.
PlayStation Vita spinoff Assassin's Creed 3: Liberation was announced at this year's E3 Gaming Expo.
It will support cross-play with the PlayStation 3 edition of Assassin's Creed 3, allowing players to unlock bonuses in both games by trading goods.
Assassin's Creed 3 and Liberation will be released for Xbox 360, PlayStation 3 and PlayStation Vita on October 31 worldwide.
A Wii U version is also in development and will be available during the system's launch window this holiday season.
The title is on course to break Ubisoft's record for the most pre-ordered game of all time.
> 'Assassin's Creed 3' E3 2012 preview: Eight anticipated features
> Digital Spy's 'Assassin's Creed 3' interview with Ubisoft
Watch a trailer for Assassin's Creed 3 below: