Port of Tallinn is the biggest port authority in Estonia. Taking into account both cargo and passenger traffic, it is one of the largest port enterprises of the Baltic Sea. Port of Tallinn is a publicly listed company managing five constituent ports: Tallinn Passenger Port / Old City Harbour – the main passenger harbour in Estonia; located in the centre of Tallinn; one of the busiest passenger ports of the Baltic Sea Muuga Harbour – the largest cargo harbour in Estonia, located in Maardu, 13 km northeast of Tallinn city centre Paldiski South Harbour – a cargo harbour in Paldiski, 40 km west from Tallinn Paljassaare Harbour – a small cargo harbour a few kilometres northwest of Tallinn city centre in Paljassaare Saaremaa Harbour – a passenger harbour on the island of Saaremaa, in Ninase In October 2016, the Port of Tallinn subsidiary TS Laevad took over operation of the ferry routes between the Estonian mainland and the islands of Saaremaa and Hiiumaa. Under the subsidiary, TS Shipping, the Port of Tallinn owns and operates icebreaker MSV Botnica. Wikipedia