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docs/ships/_index.md

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+# Ships & Naval
+
+Ship construction, modules, and naval mechanics.
+
+## Ship Construction
+
+Ships are built in Shipyards. Construction consumes resources and time.
+- Insufficient workforce slows ship construction
+- Ships cannot be refitted after building
+
+## Hulls
+
+| Hull | Size Class | Module Slots | Notes |
+|------|------------|--------------|-------|
+| [Penteconter](./hulls/penteconter.md) | Small | 2 | Cheaper, faster acceleration |
+| [Trireme](./hulls/trireme.md) | Medium | 3 | Balanced |
+| [Quinquireme](./hulls/quinquireme.md) | Large | 4 | More capacity/HP, slower acceleration |
+
+## Modules
+
+### Movement
+- [Mast](./modules/mast.md) - +long-distance speed (wind)
+- [Rows (Oars)](./modules/rows.md) - +base speed, acceleration, maneuver
+
+### Defense
+- [Reinforced Hull](./modules/reinforced-hull.md) - +health/durability
+
+### Weapons
+- [Archer Tower](./modules/archer-tower.md) - Short-range multi-arrow attack
+- [Scorpio](./modules/scorpio.md) - Side-mounted high-damage spears
+- [Onager](./modules/onager.md) - Forward catapult, long range
+
+## Ship Design Slots
+
+- Save up to 2 custom designs per hull per shipyard (6 total)
+- Ships cannot be refitted after building