Our expertise comes from experience, as our principal consultants have worked on a number of high profile submarine cable systems over the last 25 years and many have been employed by the major cable manufacturers and associated companies in the fields of marine survey and cable installation.
Pelagian
Subsea Cable Specialists
Manufacturers and Installers
Our expertise comes from experience, as our principal consultants have worked on a number of high profile submarine cable systems over the last 25 years and many have been employed by the major cable manufacturers and associated companies in the fields of marine survey and cable installation.
Case Study: Personnel and Consultancy Services for Hibernia Express
Pelagian provided expert consultancy services and personnel to the Hibernia Express project, the first trans-Atlantic telecom cable to be installed for over 10 years on a unique low latency route laid in very challenging seabed conditions.
Pelagian’s consultancy services included the management of survey and installation programs, permitting research and stakeholder management including the preparation of Notice to Mariners and information for the public.
During the 2 year project, Pelagian provided key personnel for the survey and installation campaigns and contributed to the success of the Hibernia Express project, which was awarded “Project of the Year – Subsea” and “Best Subsea Innovation” at the Global Carrier Awards in 2015.
Case Study: Personnel and Consultancy Services for Gwynt Y Mor
Pelagian provided consultancy services and key personnel to the Gwynt Y Mor project during the planning and construction phases. Gwynt Y Mor is one of the world’s largest offshore wind farms and was completed in 2014.
Pelagian’s expert consultancy services included detailed route engineering and cable burial assessment for the export and array cables, geospatial data management for survey and construction data and providing expert advice on cable burial equipment and installation methodologies to advise the tendering process.
Pelagian provided numerous offshore based technical personnel for the project, including client representatives and engineers for geophysical surveys, cable lay and foundation installation works during the project.
Case Study: Cable Burial Operations on Arklow Bank Offshore Wind Farm
In 2004 one of Pelagian’s first projects in offshore wind was the successful trenching of wind farm cables using a Gator trencher on Arklow Bank in the Irish Sea.
Arklow Bank wind farm is located on a shallow sandbank 14km off the East coast of Ireland and is the country’s first offshore wind farm consisting of 7 turbines and generating 25MW of power.
Pelagian provided the offshore expertise and project management to operate the Gator trencher. Gator is a tracked, self propelled shallow water cable trenching system, fitted with a chain cutter, enabling cable burial up to 2m in the shallow sand deposits and which provided a cost effective and comprehensive subsea cable trenching solution.
Case Study: Caribbean Sea Concession Block Stakeholder Agreements
Pelagian were contracted to provide expert permitting consultancy services for a telecom project in the Caribbean Sea.
The work scope consisted of researching the extents, activity and operational status of offshore oil/gas concessions off the northern coast of Colombia. After completion of the research, the work encompassed negotiations with the lease block owners to define a safe corridor for the planned cable route through the area.
Pelagian used its extensive knowledge of worldwide oil/gas concessions to develop a permit management system which was used to track the requirements, progress and costs associated with each lease block crossing.
Case Study: International Cable System Permitting Consultancy Services
Pelagian were contracted to provide permitting and regulatory services to a major International Cable System project, working on behalf of the cable installer and system owners.
The work scope consisted of data gathering for countries in Europe, the Mediterranean and the Far East segments of the cable system.
Challenges included the negotiations with French authorities on landing point selection and the crossing of areas of Posidonia Seagrass and sensitive negotiations in Thailand where the cable is planned to pass through a protected area. These negotiations informed both government and the cable owners of the specific requirements to minimise environmental impact to achieve a successful cable route.
Case Study: Main One Permitting Consultancy Services
Pelagian were contracted to provide permitting and regulatory services to the Main One Cable System project, working on behalf of the cable installer and system owners.
The work scope consisted of detailed in-country data gathering at a diplomatic level in all but one of the North and West African countries from Morocco to Nigeria and development of the data into a sophisticated permit management system which was used to track the requirements, progress and costs associated with each country.
The permit work encompassed detailed knowledge of government and regulatory requirements for cable landing points, work in Territorial seas, traverse of EEZ waters, crossing of oil/gas concessions and negotiation of agreements for both survey and cable installation. The work was successfully completed without delay or penalty, considered a first in the history of a West African cable project.
Case Study: Sakhalin Island Kirinskoye Umbilical Cables
Pelagian were contracted to provide route engineering services to the installers for umbilical cables, subsea distribution units and subsea manifolds as part of the Kirinskoye Gas Project located 30km east of Sakhalin Island in the Russian Pacific.
Pelagian’s work scope comprised the detailed route engineering of the umbilical cables to be laid into pre- cut dredged trenches This project presented a number of technical challenges including the translation of documentation from Russian, geospatial data management of dredging data and seabed infrastructure and engineering cables to withstand life in harsh environmental conditions, where ice and earthquake activity is commonplace.
The umbilicals were successfully installed in 2012 in water depths up to 90 metres. This project marked the first time that gas was extracted by a subsea production facility on the Russian shelf
Case Study: Middle East Cable Route Studies
Pelagian have compiled numerous Middle East based Cable Route Studies in the last 10 years for telecom customers, planning multi landing cable routes in Egypt, Saudi Arabia, Yemen, UAE, Qatar, Oman, Bahrain, Iran and Pakistan.
The Cable Route Studies provided a resource of information regarding natural and manmade hazards to the cables, permitting and environmental considerations and the design of cost effective and efficient routes to a variety of different landing countries.
Pelagian supported these projects with a proven track record of project work in the Middle East combined with an intimate knowledge of business practices, permitting and regulatory considerations and system security.
Case Study: Mediterranean Cable Route Studies
Pelagian have compiled numerous Mediterranean based Cable Route Studies in the last 10 years for telecom customers, planning trunk and spur cable routes from Northern Europe to Southern France, Italy and Spain across to Egypt, Turkey and Cyprus.
The Cable Route Studies provided a resource of information regarding natural and manmade hazards to the cables, permitting and environmental considerations and the design of cost effective and efficient routes to a variety of different landing countries.
Pelagian’s expertise in cable landing selection, marine permitting and risk assessment helped to generate a variety of diversified routes across the Mediterranean, where space for new cables is becoming difficult to engineer and environmental legislation becoming much more significant for project planning.
Case Study: Gwynt Y Mor Cable Engineering and Data Management Services
Pelagian were contracted to provide detailed route engineering and cable burial risk assessment advice for the Gwynt Y Mor offshore wind farm project. This involved working with both the developer and cable installation companies to provide expert analysis of the seabed hazards for cable routes and wind turbine generator (WTG) foundations.
Project work included the collation of 10 years of geophysical survey data into a unified geospatial dataset, which was used to inform the export and array cable route planning and also construction phase works.
Pelagian’s knowledge of the project and expertise in handling this geospatial data greatly assisted in the planning of WTG construction and cable lay operations, while forming the basis for the developer’s own geographical information database and marine management systems.
Case Study: Java Bali Power Cable Route Engineering
Pelagian was contracted to provide expert cable route engineering services for the planned installation of two 5km long power cables between the islands of Java and Bali in Indonesia.
Project work included the geospatial data management of detailed high resolution seabed bathymetry and associated seabed images to determine the location of the existing power cables and plan the routes of the new cables.
The routes proved to be very challenging, with steep rocky slopes reaching depths of 80 metres. The cables were planned to avoid suspensions and sharp rock outcrops so that they could be rock dumped after lay. Pelagian provided an expert analysis of potential cable spans to assist in the cable lay.
