Assassin's Creed III Remastered

In the Assassin HQ and vendors throughout the map you can access a ship mini-game where you manage exporting goods to and from different locations. Initially you start with one ship and each port can hold four ships so you need to buy 7 more ships split between at least two posts. You will be doing this naturally if you are accruing money to purchase the pocket watches for the "One is not Enough" achievement.