Norway's Boa Offshore has finally won a long-running legal battle with a company controlled by a Ukrainian billionaire over a cancelled newbuilding.

But the offshore vessel owner may have to resort to further legal action to secure damages.

Boa said that Kostyantyn Zhevago's Calexco company has not appealed a decision by Norway's Sor-Trondelag district court in August that prevented Calexco halting the handover of $12.7m