The Royal Thai Navy has ordered a new 90-m offshore patrol vessel (OPV) to be constructed at Mahidol Adulyadej naval dockyard in Sattahip. The newbuilding, an improved River-class design, will be powered by two MAN 16V28/33D STC engines. Locally called OPV No. 2, the order follows that of OPV No. 1, the HTMS Krabi ordered in 2009, a similar vessel that featured two 16V28/33D engines.