IJMUIDEN, the Netherlands – Thai operator Unithai Offshore has taken delivery of two OSD-IMT-designed 80-metric ton (88-ton) bollard pull offshore utility vessels.
The Unithai Samui and Unithai Chumporn were built at Unithai Shipyard and Engineering in Leam Chabang, Thailand.
They will support operations around offshore oilfields and oil terminals, such as long-line towing and push-pull tasks, firefighting, SPM maintenance, floating hose and subsea hose string maintenance, anchor handling, inter-/intrafield supply operation, and pollution control.
Both vessels are 49.98 m (164 ft) long, with a beam of 15 m (49 ft), a height of 6.2 m (20.3 ft) and a molded draft of 5 m (16.4 ft). They can accommodate a crew of 22, are classed by Bureau Veritas and registered and flagged in Thailand, operating under the rules and regulations of Thailand Registry.
Features include twin Niigata ZP41 azimuth propulsion units, each coupled via a cardan shaft arrangement to a Niigata 8L28HX marine diesel engine. This arrangement provides the vessels with a free-running speed of around 13 knots.