Most of the Jackdaw's top level upgrades require a design plan in order to be purchased. The follow is the location of each design.
| Upgrade | Location |
|---|---|
| Elite Hull Armor | San Ignacio Wreck Treasure Chest |
| Elite Broadside Cannons | The Blue Hole Treasure Chest |
| Elite Ram | La Concepcion Wreck Treasure Chest |
| Elite Round Shot Strength | Kabah Ruins Treasure Chest |
| Elite Mortars | Antocha Wreck Treasure Chest |
| Elite Swivel Guns | Devil's Eye Caverns Treasure Chest |
| Elite Heavy Shot Strength | Ambergris Key Treasure Chest |
| Elite Fire Barrel Strength | San Juan Treasure Map |
| Elite Heavy Shot Storage | Petite Caverne Treasure Map |
| Elite Mortar Storage | Matanzas Treasure Map |
| Elite Fire Barrel Storage | Isla Providencia Treasure Map |
| Elite Harpoon Strength | Andreas Island Treasure Map |


