I know I wasn't asked the question but I have some answers. Some unique abilities: Naval units receiving exp. for exploration like recon units. Extra era score for discovering new features, natural wonders, continents first. Trade routes receiving extra gold for every coastal water tile in the origin city and traders claiming water tiles. Coastal water generates science (leader in cartography science) UU: Nau can have greater sight and movement than the Caravel it replaces Unique Improvement: Feitoria can only be built on land adjacent to the coast and a luxury resource. Provides production and gold for every luxury resource and +4 loyalty and fortified strength when occupied.