June 22, 2018 the Portuguese Prime Minister announced an additional order of 6 Viana do Castelo Class ships( 60 million euros each) to be built at same shipyard over next 6 years along with a multi purpose ship for a total of 500 million  euros.
On June 22, 2018, the Portuguese Prime Minister issued an additional directive for the construction of six Viana do Castelo Class ships (each costing 60 million euros) at the same shipyard within the next six years. This was to be complemented by a multi-purpose vessel, totaling 500 million euros.