Assassin’s Creed 4 Black Flag Resynced Fire Barrel Storage Ultimate Plan Location

Fire Barrel Storage Ultimate Plan in Assassin’s Creed IV Black Flag Resynced is needed to buy the final Fire Barrel Storage ship upgrade at the harbourmaster.

Fire Barrel Storage Ultimate Upgrade Plan Location

Fire Barrel Storage Ultimate Plan is a reward for solving Treasure Map from Petite Caverne (Tulum).

Treasure Map Location: Petite Caverne (862, 237) – from a skeleton inside Petite Caverne

Treasure Map Solution: Tulum (40, 372) – at the southernmost tip of Tulum, at the beach behind a shipwreck

For all other Plans refer to All Ultimate Upgrade Plan Locations and for everything else also check the Collectible Guide.