Portugal to buy six more OPVs 27 May 2021 by Victor Barreira The Portuguese government has approved plans to acquire a third batch (NPO3S) of Viana do Castelo-class offshore patrol vessels (OPVs) as part of the Portuguese Navy's Intersectoral Program for the Renewal of the Fleet (PIRE). Portugal currently operates four Viana do Castelo-class OPVs. It will acquire six more units with improved capabilities. (Victor Barreira) A tender for the construction of six vessels will be issued in 2021 by the state-owned company idD – Portugal Defence, the Ministry of National Defence said. The first un...