Unlocks the Builder ability to construct a Seastead.
+2 Food. +1 Production for each adjacent Fishing Boats. Fishing Boats receive +1 Production for each adjacent Seastead. +1 Culture and Tourism for every adjacent Reef. +2 Housing. Must be built on Coast, Lake or Ocean terrain. Cannot be placed adjacent to another Seastead.
Adacency Bonus
+1 Production from each adjacent Fishing Boats tile.
+1 Culture from each adjacent Reef tile.