Which cabin should I upgrade first in Sea of Conquest?

Whichever one your flagship upgrade requirement names. Beyond that, the Construction Materials Room and Shipbuilder's Study give the most compounding value, because both reduce build times on everything afterwards.

Why can't I upgrade a cabin?

Either it is capped at your flagship level, or it has its own prerequisite room — the Astrologer's Chamber needs the Construction Materials Room, the Drill Hall needs the Smithing Table, the Galley needs the Salvage Bay and Cattle Shed, the Distillery needs the Water Cabin and Chicken Coop, and the Captain's Quarters needs the Mess Hall up to level 35.

What is the difference between the galley and the mess hall?

The Galley cooks. The Mess Hall is where you sell the results for gold. They are separate rooms with separate purposes, and the Mess Hall also gates the Captain's Quarters.

Where do eggs, milk and water come from?

The Chicken Coop, Cattle Shed and Water Cabin respectively. Fish come from the Salvage Bay or from fishing. These four rooms are your entire cooking supply chain.

Do I need to upgrade every cabin?

Eventually, but never evenly. Build what the flagship demands, keep the ingredient rooms fed, and let the rest wait.

How do I speed up cabin upgrades?

Alliance help first — it is free. Then the Construction Materials Room's timer discount and the Shipbuilder's Study's 1%-per-level reduction. Speedups only on cabins directly blocking a flagship upgrade.

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Sea of Conquest Cabins: Every Flagship Room and Upgrade Priority

Verified 18 August 2026

Published: 18 August 20268 min readChecked against: 1.1.740 (August 2026)