On 16 September 2006, two 90-meter Dutch-built corvettes were launched for the Indonesian Navy. The corvettes, Diponegoro (shown here) and Hasanuddin , will each have a full-load displacement of 1,700 tons, and once operational, will reach top speeds of about 28 knots. Expected to enter service in 2007, the ships have a helicopter landing deck aft, but no hangar. The armament fit for the two ships will likely consist of four Exocet antiship missiles, a single 76-mm OTO Melara cannon, and a variant of the Mistral surface-to-air missile system. Though Schelde Shipbuilding in Vlissingen, The Netherlands, is constructing the first two ships, two additional ships are planned for construction in Indonesia. Intended primarily for patrol duties in and around Indonesian waters and the Malaccan Strait, other missions will include anti-piracy, counter-smuggling, and fisheries patrol operations. Once in commission, the ship's crew is expected to total around 80 officers and enlisted.