There were maritime ports rented for 99 years. The last one rented was in Sczetin Poland and Hamburg Germany. Czechoslovakia had an ocean fleet of about 47 cargo ships. The fleet was dissolved and privatized by communist crook Kožený during the 90's after velvet revolution. In the mid-1980s, the country's overseas trade passed through East German, West German, Polish and Yugoslav ports. The Labe and Danube rivers were both navigable in Czechoslovakia. In the 1980s, the Vltava was carrying increasing amounts of traffic and efforts were underway to make it more extensively navigable. Principal river ports were located at Prague, Decin, Komarno and Bratislava. Civil aviation played a particularly significant role in the movement of passengers. Czechoslovak Airlines, the state airline company, serviced most European cities and also provided domestic services. A regional airline, Slov-Air, headquartered in Bratislava, provided additional domestic service. In 1985 civil aviation handled 1.2 million travellers. About 90% of this transport service consisted of international flights. In the mid-1980s, Czechoslovakia had a relatively well developed communications system. According to official data, there were 3,591,045 telephones in the country in 1985, about 23.2 telephones for every 100 persons, the greatest density of telephones among Comecon countries. There were 4,233,702 licensed radios, or one for every 3.7 persons and 4,368,050 licensed televisions, or one for every 3.6 persons. Both journalism and broadcasting were closely supervised by the government, but many inhabitants could receive West German or Austrian television and radio transmissions as well as Czechoslovak broadcasts.