Case Studies

Hughes Subsea Operations Track Record

Please see below table illustrating Hughes Subsea’s track record for all operations:

Please swipe horizontally to see more columns in the table below.


Brief Description

Service Type


Client Name



Case Study

North Sea Daughter Craft Deployment and Diver InspectionDiving inspectionsDivingRenewablesConfidential2022UKCase Study
European Wind Farm - Subsea Inspection FrameworkSubsea inspectionsSubseaRenewablesDong Energy2022UKCase Study
BahrainUXO ClearanceUXOOil & GasEnshore Subsea2021UKCase Study
IsraelRigging SupportPersonnelOil & GasHelix2021UK
CaithnessDe-burial & reburial CableSubseaRenewablesGlobal Marine2021UK
AllostockInspection of water tankDivingCivils & MarineIPAO2021UK
Triton KnollDebris RemovalBoulder ClearanceRenewablesInnogy2021UKCase Study
North HoyleMet Mast InspectionPersonnelRenewablesInnogy2021UK
Bramley Moore Dock: Peoples StadiumInstallation of support works to protect heritage assets. Installation of seCivilsCivils & MarineLaing O'Rourke2021UK
Isle of Man Terminal, UXO investigationInvestigation of 2 pUXO from a jack up barge within the tidal River Mersey including dredging of up to 2m within alluvial silts.CivilsCivils & MarineSISK Building Contractors2021UKCase Study
Preston City Council : Dock Gate SupportRemoval and installation of spear post supports including the removal of seized bolts within greenheart timber members.CivilsCivils & MarinePreston City Council2021UKCase Study
Birkenhead: Alfred Passage GateThe design, construction and delivery of the refurbishment of the sill at Alfred Passage Gates Manage the procurement, purchase and installation and all other relative works Dive team to confirm the current condition of the sill and construct associated works upon investigations Clean and desilt the sill.CivilsCivils & MarinePeel Ports2021UKCase Study
Barry PortUWILD SurveyCivilsCivils & MarineDeme Group2021UK
North Circe 2 Cable Route (Lowestoft)The splash zone inspections of gas riser mains on various installations were required. The purpose of the inspections was to identify gross defects and areas which could benefit from early intervention.UXORenewables-2021-
SISK - Isle of Man Terminal UXO InvestigationUXO Survey identification and removalUXORenewablesSISK Building Contractors2021UK
Hornsea 1Rigging SupportPersonnelRenewablesElmridge Cable Services2020UK
AberdeenProvision of RiggersPersonnelRenewablesHelix Robotic Solutions2020UK
Kinkcardine OWFPull in ServicesDivingRenewablesGlobal Offshore2020UK
NNG OWFProvision of Dive RepresentativeVesselRenewablesEDF2020UKCase Study
NNG OWFProvision of Guard VesselUXORenewablesEDF2020UK
Neart na GaoitheUXO & Boulder ClearanceUXORenewablesEDF2019UKCase Study
Mostyn LinkspanAnode InstallationCivilsCivils & MarinePort of Mostyn2019UK
EON- Robin Rigg OWFDiving Support to assist in recovery of objects, Removal of Belly Bands, Installation.DivingRenewablesEON2019UK
WWII Wreck, Atlantic OceanIn 2017 SMT-ROV was selected for debris recovery on the Britannia Gold WWII wreck project. The system was used to assist with dredging.ROV-Britannia Gold2017UK
Southern Tip of Bahrain and Al-Hawar Island ChannelGeophysical survey and data integrationSubseaRenewablesEnshore Subsea2017UK
Dover HarbourHughes were appointed by Dover Harbour Board to Install a new Cathodic Protection System on Monopile C at Pier 6 in the Eastern Docks. The works would include dive team weld testing and coding.CivilsCivils & MarineDover Harbour board2017UK
North Sea inspectionsIn order to provide the most cost-efficient approach to the works, from the DP2 Vessel ‘Relume’ Hughes SSE utilised both Divers and ROVs to complete over 100 safe dives.SubseaRenewablesVolker Stevin2017UK
Borkum Riffgrund, Gode wind & anholt offshore wind farmGeneral vision inspection and close vision inspection, Cathodic protection surveys (anode surveys, contact and proximity readings), Cable protection surveys, cable protection system repairs.SubseaRenewablesOrsted2016UK
Bellwind Offshore Wind farm substationInstallation of a new bellmouth on the offshore sub station,Cutting and removal of the redundant I-Tube.SubseaRenewablesConfidential2016UK
OrstedGVI and CVI, Marine Growth Thickness Readings. CP surveys (anode surveysSubseaRenewablesOrsted2016UK
Nobel Wind- Bellwind OWFCutting and removal of the redundant I Tube . Cleaning of the remaining I Tube. Levelling of the seabed. Installation of Concrete Mattresses. Survey of as left J TubeSubseaRenewablesNobel Wind2016UK
Jan de null- Burbo bank extensionCPS removal and installation, Tower team, assisting with the cable installation.DivingRenewablesJan De Null2016UK
Galloper OWFThe DP2 vessel Relume was used to identify pUXO Targets by ROVUXORenewablesJFMS2016UK
IberdrolaBoulder Clearance run along all 70 WTG locations on Wikinger OWF, to clear the defined spud cans and interaction areas of the IV ghosting primary positions from existing seabed surface for Boulders of above 0.50m height. These operations were conducted based on the seabed geophysical/geotechnical survey reports and met ocean data provided by Scottish Power.BoulderRenewablesIberdrola2016UK
Galloper OWFIdentification and disposal of pUXO targets of the whole site, on Galloper OWF. Working from the DP 2 DSV Relume, using a Panther XT Plus ROV, with state-of-the-art equipment and technologyUXORenewablesRWE Innogy2016UK
EA1 OWFUXO Survey identification and removalUXONuclearMACC EOD (Van Oord)2016UK
Gwynt- y - morAir Diving, Mattress Installation ,CPS Inspection, Boulder Relocation and Removal, UXO Identification, Temporary Bung InstallationUXORenewablesRWE2015UKCase Study
ABB Gwynt T More- Export cableCable Repair and Burial/ ReburialSubseaRenewablesABB2015UK
Alstom Halliade OWFtube removal and installation of new J tube growth, J tubeWROVRenewablesAlstom2015UK
Rampion OWFBoulder RemovalBoulderRenewablesEON2015UK
Emerald BridgeBeach Survey Report Shore End Fibre Optic Pull-in and Installation of Articulated PipeCivilsCivils & MarineOMM2015UK
London Array OWFShore End Cable Swim and Pull-in OperationsDivingRenewablesLondon Array2015UK
Rhyl Flats OWFCable SurveySubseaRenewablesInnogy2015UK
Rampion OWFCable SurveySubseaRenewablesRampion2015Germany Wikinger OWF
Hinkley Point NuclearUXO Survey identification and removalUXONuclearCostain2015UK
Thames TidewayUXO Survey identification and removalUXOCivils & MarineVolker Stevin2015UK
Wilkinger boulder relocationBoulder Clearance and RelocationBouldersRenewablesConfidential2015UK
Anglesey, Traddur bayJ Tube and Bell Mouth inspections Assistance with the Tekmar SystemDivingRenewablesOMM2013UK
Teesside OWFUXO Survey identification and removalUXORenewablesMPI Offshore2013UK
Walney 2 offshore wind farmInstallation of the Hydro Plough Cable engagement into the plough Plot anchors over 2 gas pipelines and move the plough overSubseaRenewablesMACC2012UK
Teesside OWFHughes Subsea completed a two-month Unexploded Ordnance (UXO) survey and identification campaign on the Teesside Offshore Wind Farm project. Hughes Subsea deployed a dive vessel and specialist UXO and survey Divers to investigate pre-identified anomalies, to ensure site clear.UXORenewablesMACC2012UKCase Study
London ArrayUXO Survey identification and removalUXORenewablesVSMC2012UKCase Study
London Array- offshore wind farmAir Diving, CPS Inspection, Boulder Relocation and Removal, UXO Identification, Sub-sea InspectionUXORenewablesVSMC2011Northern Europe IRMCase Study
RWE Innogy- Rhyl Flats and North HoyleGVI, CVI, CP Readings, Anode inspectionsSubseaRenewablesRWE2009UKCase Study

Rampion Offshore Wind Farm Boulder Relocation

We performed a large-scale boulder relocation campaign on the Rampion Offshore Wind Farm.  … Using the FS Pegasus and Edda Fonn, we relocated 16…

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North Sea Daughter Craft Deployment and Diver Inspection

Our commercial diving team inspected 15 individual risers in the North Sea, utilizing our in-house dive intervention daughter craft.

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SISK - Isle of Man Terminal UXO Investigation

Hughes Subsea was selected by SISK to provide pUXO investigation and identification services of two potential UXO anomalies found during previous…

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European Wind Farm - Subsea Inspection Framework

Hughes Subsea were successfully awarded Dong Energy’s European Subsea Inspection Framework.

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DNVAssociation of Diving ContractorsIMCAInstitute of Explosives EngineersAchilles UVDB - Silver PlusAchilles Oil and Gas Europe - SilverAchilles UNCE - Silver PlusLloyds Register Approved Service SupplierConstructionline - Gold Member