City and port of Georgia, USA, 29 km/18 mi from the mouth of the Savannah river; population (1980) 226,000. Founded 1733, Savannah was the first city in the USA to be laid out in geometrically regular blocks. It exports cotton, and produces cottonseed oil, fertilizers, and machinery. The Savannah, the first steam-powered ship to cross the Atlantic, was built here; most of the 25-day journey, in 1819, was made under sail. The first nuclear-powered merchant ship, launched by the USA 1959, was given the same name.