Black Flag Resynced Ultimate Ship Plans: All 12 Locations

Black Flag Resynced Ultimate Ship Plans are the blueprints needed for the final tiers of the Jackdaw’s upgrades. There are 12 altogether: six are hidden in underwater wrecks, and six require you to pick up a treasure map and then dig at its marked destination. Buying the plan isn’t an option; you must find it.

The remake shifts several item and map coordinates from the 2013 game. Use the Resynced coordinates below rather than assuming an original Black Flag map still points to the right island. This Black Flag Resynced Ultimate Ship Plans walkthrough gives the precise wrecks, both coordinates for every map puzzle and the next step required to actually install each upgrade.

All Black Flag Resynced Ultimate Ship Plans Locations

Plan	Location	Coordinates
Hull Armor	San Ignacio Wreck (dive)	348, 744
Mortars	Antocha Wreck (dive)	600, 636
Ram	La Concepción Wreck (dive)	150, 271
Swivel Guns	Devil’s Eye Caverns (dive)	456, 332
Broadside Cannons Number	The Blue Hole (dive)	440, 145
Round Shot Strength	Kabah Ruins (dive)	738, 120
Heavy Shot Strength	Ambergris Key → Misteriosa	28, 160 → 271, 178
Fire Barrel Strength	Santanillas → San Juan	191, 218 → 455, 462
Heavy Shot Storage	Cayman Sound → Petite Caverne	298, 311 → 863, 235
Mortar Storage	Tortuga → Matanzas	851, 352 → 312, 617
Harpoon Strength	Mariguana Island → Andreas Island	847, 514 → 544, 693
Fire Barrel Storage	Petite Caverne → Tulum	862, 237 → 40, 372

In the final six rows, the first coordinate belongs to the map pickup and the second to the buried treasure. For the initial six, use the diving bell at the named wreck and search the indicated chest. The locations match the 2026 remake’s Caribbean map.

How to Unlock Black Flag Resynced Ultimate Ship Plans Underwater

Finish Sequence 6’s first mission, Diving for Medicines, to unlock the diving bell. You cannot reach the submerged Black Flag Resynced Ultimate Ship Plans before this story milestone, though the six treasure-map plans can be collected earlier if you can visit their islands. Nothing is missable after the ending.

Locations of the Six Underwater Plans

At San Ignacio Wreck (348, 744), the Hull Armor chest is inside the big sunken hull in the northwest; watch for the shark. The Mortars blueprint is in the southern part of Antocha Wreck (600, 636). Both improve your chances against the tougher naval encounters.

The Ram plan is in an early chest north of the diving bell at La Concepción Wreck (150, 271). For Swivel Guns, dive at Devil’s Eye Caverns (456, 332), follow the tunnels north and search the left-hand alcove of the dry cavern.

At The Blue Hole (440, 145), the Broadside Cannons Number plan is beneath a broken hull in the northern part of the dive. Kabah Ruins (738, 120) holds the Round Shot Strength plan at the far end of its northern tunnel. Shelter in the small recesses when the strong current surges, and refill air where possible.

Black Flag Resynced Ultimate Ship Plans From Treasure Maps

Heavy Shot Strength begins with the treasure map in a cave at Ambergris Key (28, 160). Enter through the underwater tunnel and climb to the upper floor. Dig beside the fountain and white flowers behind the Mayan temple at Misteriosa (271, 178).

For Fire Barrel Strength, collect the map on the small hill at Santanillas (191, 218), climbing up via the trees. Dig inside San Juan (455, 462), on the right after leaving the water and before ascending the wooden scaffold.

The Heavy Shot Storage map is beside a beach skeleton at Cayman Sound (298, 311). Its chest is behind rocks and a waterfall in Petite Caverne (863, 235), near the Hutia hunting area. These Black Flag Resynced Ultimate Ship Plans require you to actually pick up the map first.

For Mortar Storage, collect the map from Tortuga’s eastern beach (851, 352), then search behind the waterfall beside the Mayan Stela at Matanzas (312, 617). The Harpoon Strength map is in the hidden cave at Mariguana Island (847, 514); crouch through the concealed entrance and dig on the small island south of Andreas Island (544, 693).

Finally, the Fire Barrel Storage map sits beside a skeleton inside Petite Caverne (862, 237). Dig on Tulum’s southernmost beach (40, 372), behind the shipwreck. That gives you all 12 Black Flag Resynced Ultimate Ship Plans if you collected the six diving chests as well.

Buying Black Flag Resynced Ultimate Ship Plans Upgrades

Visit a Harbourmaster and select Upgrade Ship. Finding a plan unlocks the relevant final tier, but the upgrade still costs Reales and materials. You must improve the Harbourmaster shop at Great Inagua to access all of these tiers, too. Check the purchase menu after every new blueprint rather than assuming the Jackdaw upgraded automatically.

A published full-upgrade tally puts the Jackdaw and Harbourmaster at 309,800 Reales, 4,755 Metal, 2,750 Wood and 550 Cloth. Treat that as an overall checklist rather than the price of the 12 plans alone. That amount covers the complete improvement process, not 12 separate plan purchases. The Ship This trophy requires the actual upgrades.

Do Black Flag Resynced Ultimate Ship Plans Carry Over to New Game+?

Yes. Title Update 1.0.8 keeps your purchased ship upgrades and acquired or completed treasure maps. The Jackdaw itself becomes accessible again when you reach the relevant story point. You can therefore enter New Game+ with the upgrades you bought on your first run.

If you’re short of Reales, Kenway’s Fleet can bring in more resources once you unlock it in Sequence 4. It also helps to collect nearby map clues before sailing to their buried-treasure destinations. That way, you can finish several trips in one region rather than criss-crossing the Caribbean for every blueprint.

Which Ultimate Ship Plan Should You Get First?

If you’re struggling in ship battles, collect the Hull Armor plan at San Ignacio first. Mortars from Antocha Wreck give you another way to damage tougher ships before they close in. From there, work towards the final broadside, swivel and heavy-shot upgrades. Every Black Flag Resynced Ultimate Ship Plans pickup remains available after the campaign, so you can return to anything you missed.

Official game and image source: Ubisoft Black Flag Resynced.