Apache Energy will keep the 4,200-dwt Blue Fighter and BlueProsper (both built 2012) for work in the North Sea, Ulstein said in astatement.

Contract terms were not revealed.

The vessels were the first two of six speculatively builtPSVs, the last of which hit the water last month.

Ulstein built the series of PX 121 design vessels with theintention of selling them on though all six are still on the market.

Remoy