DOF ASA, together with its subsidiaries, owns and operates a fleet of offshore/subsea vessels. It operates a fleet of platform supply vessels (PSVs) that are used to transport oilfield products and supplies to offshore drilling and production facilities; anchor handling tug supply (AHTS) vessels used to set anchors for drilling rigs, and tow mobile drilling rigs and equipment from one location to another; and subsea vessels used for a range of subsea services. The company also provides subsea services, including project management, engineering, construction and installation, life-of-field, decommissioning/field abandonment, and survey and positioning, as well as inspection, repair, and maintenance services. In addition, it offers marine management services, such as crewing, chartering, mobilization, maintenance, refurbishment, project and new building, and compliance services. The company operates a fleet of 14 PSVs, 15 AHTSs, and 30 subsea vessels, as well as 73 remotely operated vehicles and 2 autonomous underwater vehicles. It operates in Brazil, the United Kingdom, Norway, Australia, Canada, Singapore, the United States, Argentina, Angola, and internationally. The company was founded in 1981 and is headquartered in Storebø, Norway.