Swire Pacific Offshore has four (4) Anchor Handling Tug Supply (AHTS) vessels of 17,864 BHP with 200-225 tonne continuous bollard pull, under construction at Drydocks World's shipyard in Singapore with delivery in 2012 and 2013.

The Havyard 844 XL design was developed in close collaboration with SPO's technical team, catered for offshore deepwater requirements. These SPO D-Class vessels are to be built to clean class and ice class notations, and equipped with powerful 500 MT Rauma Brattvaag winches. The vessels will have ample power to support the latest generation semi-submersible rigs operating in deepwater and harsh environments whilst having adequate tank capacities and clear deck space for other offshore applications. The vessels will also adopt the latest Dynamic Positioning technology, and will carry Sps 2008 notation.

The vessel design takes fuel efficiency and environmental concerns into careful consideraton, taking into account the variety of roles in which the vessels will likely be engaged.