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Cities with a Harbor produce veteran naval units instead of regulars. Coastal, sea, and ocean squares produce one extra food. A harbor is a link in the trade network, allowing luxuries and strategic resources to be traded to other harbors.

Civilopedia EntryEdit

Just because a city is built in a coastal region doesn't guarantee that the city is readily accessible by ship. In order for a port city to establish a steady trade, fishing, or other shipping industry, the city must have a harbor. A harbor is a protected body of water that opens into an ocean or lake that shelters ships from waves and high winds. Although some coastal cities are established in areas where a natural harbor exists, most seaports are forced either to improve the existing natural harbor, or to build a man-made harbor to shelter ships and provide channels deep enough to accommodate large vessels.

Civilization III Buildings

AirportAqueductBankBarracksCathedralCivil DefenseCoal PlantCoastal FortressColosseumCommercial DockCourthouseFactoryGranaryHarborHospitalHydro PlantLibraryManufacturing PlantMarketplaceMass Transit SystemNuclear PlantOffshore PlatformPalacePolice StationRecycling CenterResearch LabSAM Missile BatterySolar PlantSS CockpitSS Docking BaySS EngineSS Exterior CasingSS Fuel CellsSS Life Support SystemSS Planetary Party LoungeSS Stasis ChamberSS Storage-SupplySS ThrustersStock ExchangeTempleUniversityWalls