Корвети класу Centenary (проект P18N)

In November 2014 China completed sea trials of an offshore patrol ship on order for the Nigerian Navy that will assist in suppressing the growing threat of piracy off West African shores. The P18 corvette is the export version of the Type 056. The vessels acquired by the Nigerian Navy to bolster its maritime surveillance, patrolling, search-and-rescue and to counter piracy.

The P18N offshore patrol vessel (OPV) displaces 1,800 tons, is 95 m (312 ft) long, has an endurance of 20 days, a maximum speed of 21 knots (39 km/h) and a range of 3,000 nautical miles (5,600 km) at 14 knots (26 km/h). It has a crew of 75. Armament is reportedly a single NG-16-1 76 mm gun with a TR47 fire-control radar, two 30 mm guns, and two 20 mm guns. The class has an Oil Support Recovery System to combat oil spills. Unlike the Jiangdao-class corvette, the P18N has a helicopter hangar.

Nigeria ordered two P18Ns from CSOC in April 2012 for US$42 million each. The first was slated to be completed in China, with the final 50–70% of the second being completed at the Nigerian Naval Shipyard in Port Harcourt; CSOC was contracted to upgrade the shipyard to facilitate this.