The Port of Chittagong is the largest seaport in Bangladesh, located by the estuary of the Karnaphuli river in Patenga, near the city of chittagong. It is a deepwater seaport dominated by trade in containerised manufactured products (especially garments, jute and jute goods, leather products, fertilisers and seafood), raw materials and to a lesser extent passengers. It is one of the two main sea port of Bangladesh - most of the export and import of the country are handled via this port. Window berthing system was introduced at the seaport on August 6, 2007, enabling the sea port to provide the arrival and departure times of all ships. Two berths at the port terminal are kept in reserve for emergency. In 2006 the port handled 27 million tonnes of cargo and 0.8 million tonnes of containers.[ The port handled 1.5 million TEUs (twenty equivalent units) containers in 2010-11, up from 12.12 lakh TEUs in the previous year, according to the CPA Traffic Department.