The company will construct a pair of PX121 designs for its BlueShip Invest shipowning arm for delivery in early 2015, it said today.

Ulstein originally built six of the vessels in 2012 and2013, all of which were subsequently snapped up by Herbjorn Hansson’s newoffshore venture Nordic American Offshore (NAO).

NAO, which plans to list in New York this spring, has since returnedto Ulstein for two further units and should be in pole position to land thelatest two vessels which are scheduled to hit the water in the first quarter of2015.

The