In Assassin's Creed Rogue, Shay Cormac commands the ship Morrigan.
Shay begins the game as an Assassin operating in the North Atlantic during the Seven Years' War. After a disastrous mission and a break with the Brotherhood, he joins the Templars and hunts former allies, giving Rogue its distinctive perspective on the series' central conflict.
The Morrigan is a fast vessel designed for Arctic waters. Its upgrades and specialized equipment support naval battles, exploration, and movement through icy regions, continuing the ship-focused gameplay introduced by Black Flag.
The Jackdaw is Edward Kenway's ship in Black Flag, while the Aquila is associated with Connor Kenway in Assassin's Creed III. Those names are therefore plausible but incorrect for Shay's vessel.