🗺️ Ultimate Plan Locations

All 12 Ultimate Ship Plans required for max-level Jackdaw upgrades. Track your collection progress — data saved in your browser.

Collection Progress

0 / 12 collected (0%)

🏊 Shipwreck Dives (6 plans — Requires Diving Bell, unlocked Sequence 6)

Each shipwreck contains an Ultimate Plan in an underwater chest. Watch out for sharks — use kelp for cover.

Hull Armor Elite Plan

Unlocks: Armored Hull V

📍 Location:San Ignacio Wreck[352, 744]Underwater

Round Shot Strength Plan

Unlocks: Round & Heated Shot V

📍 Location:Kabah Ruins[738, 120]Underwater

Mortar Strength Plan

Unlocks: Mortar IV

📍 Location:Antocha Wreck[600, 636]Underwater

Ram Elite Plan

Unlocks: Ram IV

📍 Location:La Concepcion Wreck[150, 272]Underwater

Swivel Guns Elite Plan

Unlocks: Swivel Guns IV

📍 Location:Devil's Eye Caverns[456, 332]Underwater

Broadside Cannons Elite Plan

Unlocks: Broadside Cannons VII

📍 Location:Blue Hole[440, 145]Underwater

💎 Treasure Map Digs (6 plans — Available any time, no Diving Bell needed)

Find the treasure map at the first location, then sail to the dig site. Some dig sites require swimming through underwater tunnels.

Heavy Shot Strength Plan

Unlocks: Heavy Shot III

🗺️ Map:Ambergris Key[28, 160]
📍 Dig:Misteriosa[271, 178]

Fire Barrel Strength Plan

Unlocks: Barrel Launcher II

🗺️ Map:Santanillas[191, 218]
📍 Dig:San Juan[455, 462]

Heavy Shot Storage Plan

Unlocks: Heavy Shot Storage IV

🗺️ Map:Cayman Sound[298, 311]
📍 Dig:Petite Caverne[863, 235]

Mortar Storage Plan

Unlocks: Mortar Storage IV

🗺️ Map:Tortuga[851, 352]
📍 Dig:Matanzas[312, 617]

Fire Barrel Storage Plan

Unlocks: Fire Barrel Storage IV

🗺️ Map:Petite Caverne[862, 237]
📍 Dig:Tulum[40, 372]

Harpoon Strength Plan

Unlocks: Harpoon III

🗺️ Map:Mariguana Island[847, 514]
📍 Dig:Andreas Island[544, 693]

💡 Tips for Collecting Ultimate Plans

⚓ Calculate Upgrade Costs