Port of Oulu (Port Code: FIULE/FIOUL) is a port located at the mouth of Oulujoki river in Oulu, Finland. Covering an area of 180ha, it is a complex of three separate harbours and owned by the City of Oulu. Annual average of 3 million tons of cargo is shipped on 500 vessels. Two of the ports, Nuottasaari and Oritkari, are also rail-served. The port has a Free Trade Zone Area of 18,000m², which offers economic advantages to importers and exporters. Open all year round, the port uses icebreakers to keep approach channels free between mid-December and end March/early April. Exports consist mainly of paper, cellulose, timber and chemicals while coal, china, clay, glauber salt, fuel oil, guano, chemicals and raw materials are imported. Ro-Ro and container traffic are also handled.