DOF ASA engages in the provision of essential offshore and subsea services. It operates through the following segments: Platform Supply Vessel (PSV), Anchor Handling Tug Supply Vessel (AHTS), and Subsea. The PSV segment transports oilfield products and supplies to offshore drilling and production facilities. The AHTS segment is used to set anchors for drilling rigs, tow mobile drilling rigs, and equipment from one location to another. The Subsea segment comprises of survey, diving services, ROV operations, construction, and IRM among others. The company was founded in 1981 and is headquartered in Storebo, Norway.