1. Zero-Memory Sightlines: Each tile has one of 4 Terrain Symbols (Island, Lighthouse, Whirlpool, Reef) and a Compass Needle pointing in 1 of 8 directions.
2. Connecting Shipping Lanes: When you place a tile, if its needle points along a straight or diagonal line toward a tile with the same Terrain Symbol—OR if an existing tile on the board points at your new tile with the same symbol—a golden Shipping Lane forms!
3. Sweeping Obstacles: Any intermediate tiles sitting between the two connected endpoints are swept clear for bonus points (+150 pts each), keeping the board alive infinitely.
4. Trade Route Upgrades: Clearing 3+ tiles at once or triggering multiple sightlines in a single placement sparks a Trade Route, upgrading random tiles left on the board into ×2 Silver or ×3 Gold Landmarks.