Mortars Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Mortars ship upgrade at the harbourmaster. Mortars Ultimate Upgrade Plan Location Mortars Ultimate Plan is looted from an underwater chest in Antocha Shipwreck (600, 636).   For all other Plans refer to All Ultimate Upgrade Plan Locations and for everything else also check the Collectible Guide.

Ram Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Ram ship upgrade at the harbourmaster. Ram Ultimate Upgrade Plan Location Ram Ultimate Plan is looted from an underwater chest in La Concepción Shipwreck (184, 425).   For all other Plans refer to All Ultimate Upgrade Plan Locations and for everything else also check the Collectible […]

Swivel Guns Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Swivel Guns ship upgrade at the harbourmaster. Swivel Guns Ultimate Upgrade Plan Location Swivel Guns Ultimate Plan is looted from an underwater chest in Devil’s Eye Caverns Shipwreck (456, 332).   For all other Plans refer to All Ultimate Upgrade Plan Locations and for […]

Broadside Cannons Number Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Broadside Cannons Number ship upgrade at the harbourmaster. Broadside Cannons Number Ultimate Upgrade Plan Location Broadside Cannons Number Ultimate Plan is looted from an underwater chest in The Blue Hole Shipwreck (440, 145).   For all other Plans refer to All Ultimate […]

Round Shot Strength Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Round Shot Strength ship upgrade at the harbourmaster. Round Shot Strength Ultimate Upgrade Plan Location Round Shot Strength Ultimate Plan is looted from an underwater chest in Kabah Ruins Shipwreck (738, 120).   For all other Plans refer to All Ultimate Upgrade […]

Heavy Shot Strength Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Heavy Shot Strength ship upgrade at the harbourmaster. Heavy Shot Strength Ultimate Upgrade Plan Location Heavy Shot Strength Ultimate Plan is a reward for solving Treasure Map from Ambergris Key (Misteriosa). Treasure Map Location: Ambergris Key (28, 160) – […]

Fire Barrel Strength Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Fire Barrel Strength ship upgrade at the harbourmaster. Fire Barrel Strength Ultimate Upgrade Plan Location Fire Barrel Strength Ultimate Plan is a reward for solving Treasure Map from Santanillas (San Juan). Treasure Map Location: Santanillas (191, 218) – on a little […]

Heavy Shot Storage Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Heavy Shot Storage ship upgrade at the harbourmaster. Heavy Shot Storage Ultimate Upgrade Plan Location Heavy Shot Storage Ultimate Plan is a reward for solving Treasure Map from Cayman Sound (Petite Caverne). Treasure Map Location: Cayman Sound (298, 311) – from […]

Mortar Storage Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Mortar Storage ship upgrade at the harbourmaster. Mortar Storage Ultimate Upgrade Plan Location Mortar Storage Ultimate Plan is a reward for solving Treasure Map from Tortuga (Matanzas). Treasure Map Location: Tortuga (851, 352) – at the eastern shoreline of Tortuga, from a skeleton […]

Harpoon Strength Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Harpoon Strength ship upgrade at the harbourmaster. Harpoon Strength Ultimate Upgrade Plan Location Harpoon Strength Ultimate Plan is a reward for solving Treasure Map from Mariguana Island (Andreas Island). Treasure Map Location: Mariguana Island (847, 514) – Approach the treasure map icon […]