The subsidiary of Royal Boskalis Westminster is splashing out on a quartet of 65-tonne-ballard-pull azimuth stern drive terminal tugs on the back of the $120 million, 10-year contract from Esso Highland.

Upstream reported in April that the company was on the verge of penning an order, most likely at a Chinese yard, as it was close to firming up a contract in Southeast Asia.

The