The Shipyard is a building used to build Ships. Components used by the Shipyard are built at the Naval Engineer, while captains are purchased at the Tavern. Each Shipyard can produce 1 type of ship at any one time.
Level 1 ships require coin, Wood and Wool for their components. They have 1 item slot for upgrades.
Level 2 ships require coin, Wood and Iron, together with Wool and Hemp for their components. You need to have at least 1000 merchants to build the components. Level 2 ships have 2 item slots.
Level 3 ships require coin, Wood, Iron and Brass, together with Wool, Hemp and Animal Hides for their components. You need to have at least 1000 imperials to build the components. Level 3 ships have 3 item slots.