The deal with the Chinese yard comes with options for twomore of the same Ulstein PX121H designs, according to a statement.
The firm 4,000-dwt newbuildings are scheduled fordelivery in the first and second quarters of 2016.
They will be equipped with DP2 systems and can accommodateup to 30 people.
No price was disclosed for the order however Clarksons listsNantong Rainbow as having a pair of 4,200-dwt vessels on order at the same yardfor $28m apiece.
