Pelagian has the capability to provide its customers with a full survey solution using well established strategic partnerships with the world’s leading survey companies. We work closely with these companies providing key personnel, project management and permitting expertise.
Pelagian
Subsea Cable Specialists
Survey
Pelagian has the capability to provide its customers with a full survey solution using well established strategic partnerships with the world’s leading survey companies. We work closely with these companies providing key personnel, project management and permitting expertise.
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: Main One Geophysical Survey
Pelagian in partnership with a major international survey company, successfully bid for the Main One Cable Route Survey in 2008. This was a significant landmark in Pelagian’s history and the company’s largest single contract award at that time.
The scope of work comprised geophysical surveys for the Main One cable system from Portugal to Nigeria from landing point to deepwater. Pelagian provided expertise in cable route engineering and landing point selection, operational permitting for the survey vessels and burial assessment knowledge to the CPT sampling campaign.
The project was successfully surveyed in 2009 without any delays caused by permitting or regulatory constraints, considered a first in West African cable survey experience. Pelagian also provided permitting expertise for the successful installation of the cable in 2010.
Case Study: Annual Depth of Burial Survey
Pelagian has been providing annual depth of burial surveys on a subsea telecom cable in Europe for the last 10 years. This cable is located in an environmentally sensitive shallow water area, where numerous cables from both telecoms and offshore renewables / power make landfall in Northern Europe.
The seabed in the area is prone to sediment mobility, potentially exposing the buried cable to external risks such as fishing and anchoring. The area has also recently seen a number of new projects with increased construction shipping activity, serving the offshore wind farms.
The survey is undertaken using high resolution multibeam bathymetry, sidescan sonar and subsea cable tracking equipment mounted on a sled. This is used to determine the depth of cover of sediment and enable direct comparisons with the previous years’ survey, to monitor the burial status of the cable.
