A semi-submersible platform is a specialised marine vessel used in offshore roles including as offshore drilling rigs, safety vessels, oil production platforms, and heavy lift cranes. They have good ship stability and seakeeping, better than drillships.
The Saipem 7000 is the world's third largest semi-submersible crane vessel, after the SSCV Sleipnir and the SSCV Thialf. It is owned by the oil and gas industry contractor Saipem S.p.A.
The SSCV Thialf is a huge semi-submersible crane vessel operated by Heerema Marine Contractors, and it was the largest crane vessel in the world until the SSCV Sleipnir became the largest in 2019.
DCV Balder is a deepwater construction vessel (DCV) operated by Heerema Marine Contractors.
Ulstein Group is a group of companies that focus on various marine-related industries, but is mainly known for its shipbuilding and ship design activities. The largest unit is Ulstein Verft AS. The company's head office and primary operations are located in the town of Ulsteinvik in the municipality of Ulstein in Møre og Romsdal county, Norway, an important area for the Norwegian maritime cluster, and with subsidiaries in several other countries. The group also includes companies working with power & control systems and solutions, engineering, site follow-up and aftermarket services. The company has also been engaged in shipping.
A crane vessel, crane ship, crane barge, or floating crane is a ship with a crane specialized in lifting heavy loads, typically exceeding 1,500 t for modern ships. The largest crane vessels are used for offshore construction.
Pioneering Spirit is a catamaran crane vessel owned by the Switzerland-based Allseas Group designed for the single-lift installation and removal of large oil and gas platforms and the installation of record-weight pipelines. The 382-metre-long (1,253 ft), 124-metre-wide (407 ft) vessel is the world's largest vessel by gross tonnage, and since September 2021 also the largest floating sheerleg in the world. It was built in South Korea by Daewoo Shipbuilding & Marine Engineering in 2013 at a cost of €2.6 billion. It commenced offshore operations in August 2016.
International Marine Contractors Association (IMCA) is a leading international trade association for the marine contracting industry. It is a not for profit organisation with members representing the majority of worldwide marine contractors in the oil and gas and renewable energy industries.
Allseas Group S.A. is a Swiss-based offshore contractor specialising in pipelay, heavy lift and subsea construction. It was founded in 1985 by owner and president Edward Heerema, employs 4,000 people and operates worldwide.
McTay Marine was a shipbuilder in Bromborough, Merseyside from 1974 to 2016.
Heerema Marine Contractors (HMC) is a contractor headquartered in the Netherlands most notable for operation of three of the largest crane vessels in the offshore industry.
The FPSO Noble Seillean was a dynamically positioned floating oil production, storage and offloading vessel.
The Castoro Sei was a column stabilized semi-submersible pipelay vessel. She had an overall length of 152 metres (499 ft), a width of 70.5 metres (231 ft) and an operating draught of 7.8 to 15.5 metres.
Ægir is a figure in Norse mythology.
SSCV Hermod was a semi-submersible crane vessel operated by Heerema Marine Contractors.
The Tide-class tanker (formerly the Military Afloat Reach and Sustainability (MARS) project) is a class of four fast fleet tankers that entered service with the British Royal Fleet Auxiliary from 2017. The 37,000 t ships provide fuel, food, fresh water, ammunition and other supplies to Royal Navy vessels around the world. Norway ordered a similar 26,000 t version with a 48-bed hospital and greater solid stores capacity, but reduced liquid capacity; it was delivered in November 2018 as HNoMS Maud two years after originally planned. The two classes are very similar but are not directly comparable due to large variance in capabilities delivered.
The Samudra-class Pollution Control Vessel is a class of three vessels built by the ABG Shipyard in Gujarat for Indian Coast Guard.
HMCS Harry DeWolf is the lead ship of its class of offshore patrol vessels for the Royal Canadian Navy (RCN). The class was derived from the Arctic Offshore Patrol Ship project as part of the National Shipbuilding Procurement Strategy and is primarily designed for the patrol and support of Canada's Arctic regions. Named after Vice Admiral Harry DeWolf, a former head of the RCN, the vessel was ordered in 2011, laid down in 2016 and launched in 2018. The vessel completed contractors sea trials in July 2020, was delivered to the RCN on 31 July 2020 and began post-acceptance sea trials. Harry DeWolf was commissioned on 26 June 2021.
HMCS Margaret Brooke is the second Harry DeWolf-class offshore patrol vessel for the Royal Canadian Navy (RCN). The class was derived from the Arctic Offshore Patrol Ship project as part of the National Shipbuilding Procurement Strategy and is primarily designed for the patrol and support of Canada's Arctic regions. Named after Sub-Lieutenant Margaret Brooke, an RCN nursing sister who tried to save another person during the sinking of the ferry SS Caribou during World War II. Margaret Brooke was ordered in 2011, laid down in 2016 and launched in 2019. The vessel began contractor sea trials in May 2021, and it was delivered to the Royal Canadian Navy for post-acceptance sea trials on 15 July 2021. The official naming ceremony for the ship was conducted on 29 May 2022 in conjunction with that for sister ship Max Bernays. The vessel was commissioned on 28 October 2022.
SSCV Sleipnir is a semi-submersible crane vessel (SSCV) owned and operated by Heerema Marine Contractors. It is named for Sleipnir, the eight-legged horse ridden by Odin in Norse mythology. The vessel is equipped with two revolving cranes built by Huisman Equipment B.V., each with a capacity of 10,000 t ; the main cranes can be operated in tandem to jointly lift 20,000 t. It was ordered in 2015 and built in Singapore by Sembcorp Marine. After its completion in 2019, SSCV Sleipnir succeeded Heerema's earlier SSCV Thialf as the largest crane vessel in the world.
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