James Fisher and Sons plc, together with its subsidiaries, provides marine and specialist engineering services worldwide. It operates through four segments: Marine Support, Specialist Technical, Offshore Oil, and Tankships. The Marine Support segment engages in the provision of ship to ship transfer services; offshore terminal services; integrated marine services, including remotely operated vehicle systems and diving services; mass-flow excavation services; and products and services that measure and monitor structural stress, and instrumentation and testing materials to marine, oil and gas, renewables, defense, civil, and construction end markets. The Specialist Technical segment designs, supplies, and services diving and subsea equipment, submarine rescue products, and special operational services, as well as offers engineered solutions in remote handling, non-destructive testing, and calibration services to defense, commercial and defense diving, hyperbaric, submarine rescue, and nuclear decommissioning end markets. The Offshore Oil segment is involved in the design and engineering of specialist equipment; platform maintenance and modification; well testing support; products and services to well testing companies; and subsea operations, as well as offers artificial lift specialist completion technology and accessory tools for electrical submersible pumps, and lifting equipment and services to the marine, offshore, and subsea industries. The Tankships segment delivers clean petroleum products by operating a fleet of product tankers, which carry petrol, diesel, and kerosene in the European coastline; and is involved in port operations. James Fisher and Sons Plc was founded in 1847 and is headquartered in Barrow-in-Furness, the United Kingdom.