The Argonaut was one of the seven legendary ships encountered by the Assassin-turned-Templar Shay Cormac in the North Atlantic during the Seven Years' War.

Along with the Sceptre, the Argonaut was used as an escort ship for the Assassin vessel, the Storm Fortress. If the Storm Fortress was sufficiently damaged, the escorts would distract the enemy ships. Despite these advantages, all three ships were ultimately defeated by Shay Cormac.