Duncan Limerick MacPherson

Isurvey Holding AS engages in investment services within real estate, securities, and other assets. It provides survey and positioning services to the global oil and gas, telecommunications, and offshore renewable energy sectors, through its subsidiaries. The company was founded on January 30, 2013 and is headquartered in Billingstad, Norway.

Reef Subsea AS use to provides subsea services to oil and gas and renewable energy industries. It services include subsea construction and IMR, installation and trenching of cables and umbilicals, seabed dredging, excavation and ROV and survey services. The firm's renewable energy services were installation, trenching, onshore and offshore project and engineering management. The company was founded in 2009 and was headquartered in Bergen, Norway.

Technocean Subsea AS provides all services in subsea technology including consulting services. It also offers services related to extraction of crude oil and natural gas. The company was founded on May 29, 2006 and is headquartered in Bergen, Norway.

DOF Subsea AS delivers subsea solutions to the offshore energy industry. It offers construction and installation, tow, mooring installation and repair, inspection, maintenance and repair, decommissioning services, survey and positioning, saturation and air diving, and engineering services. The company was founded in May 2005 and is headquartered in Bergen, Norway.