James Fisher & Sons Plc provides marine services. It operates through the following segments: Marine Support, Offshore Oil, Specialist Technical and Tankships. The Marine Support segment includes the hire and sale of large scale pneumatic fenders and ship to ship transfer services and the design and supply of systems for monitoring strain and stress in structures. The Offshore Oil segment includes assembly and rental of equipment for the offshore oil and gas industry and the design and manufacture of specialist downhole tools and equipment for extracting oil. The Specialist Technical segment provides subsea services including submarine rescue and saturation diving including maintenance, asset management and consultancy services and the non destructive testing, decommissioning and remote operations and monitoring services predominantly to the nuclear industry. The Tankships segment is engaged in the sea transportation of clean petroleum products in North West Europe. James Fisher & Sons was founded by James Fisher in 1847 and is headquartered in Barrow-in-Furness, the United Kingdom.