By owning and operating the cable laying vessels Ariadne and Atalanti, we are in a unique position to potentially undertake any sort of submarine cable installation project,…
SUBSEA CABLE EXPERTS
The worldwide experts in offshore installation projects
Asso.subsea undertakes among the most complex subsea cable projects in the world. Thanks to our wide pool of resources and highly qualified personnel, we are able to tailor-make the right tailor-made solution for any type of project.
SERVICES
OUR EXPERTISE
We hold an unrivalled track record in the transportation, installation and protection of any type of submarine cables, from interconnectors to offshore wind farms.
Subsea Cable Protection
Protecting submarine cables is at the heart of our business. We have designed, build and operate our own burial tools for 25 years, and with our proprietary…
Seabed Preparation
Seabed is filled with rocks, boulders, debris, and other irregularities. Our interventions are necessary when installing submarine cables, to ensure that a “clean” and “stable” base is…
Subsea IMR
Major submarine interconnections can suffer significant cost of service interruption that can rise into the tens of millions per month. Without a proper contingency plan outages of…
Floating Offshore Wind Farm
Asso.subsea is a frontrunner in the floating wind industry and is already involved in two different projects in France. Thanks to strong and long-standing cooperations with some…
PROJECTS
OUR ACTIVITIES
Fecamp OWF (IAC) (France) – Subsea Cable Laying/Cable Protection
In progress ASSO shall perform the route preparation (boulder clearance and PLGR operations), cables installation (cables free laying and pull-in activities) and protection activities by means trenching at 57x array cables and 14x collector cables. The ...
St. Brieuc OWF (IAC) (France) – Subsea Cable Laying/Seabed Preparation
In progress The St. Brieuc Project zone is located off the northwest coast of France, in the bay of St. Brieuc. The proposed development zone is approximately sixteen (16) km from the shore and extends over an area of 103 km². The actual wind farm site ...
Kaskasi II (Germany) - Subsea Cable Laying
The Kaskasi II project concerns the realization of a three-phase AC connection in North-Sea-Cluster 4. The three-phase current generated in the Kaskasi II offshore wind farm is to be transported to the HVDC substation HelWin Beta via two AC subma ...
Viking Link – Subsea Cable Protection
In progress Viking Link is a proposed 1,400MW 760km subsea interconnector between the substation Bicker Fen in Lincolnshire, UK and the substation Revsing in southern Jutland, Denmark. The purpose of the project is the transmission of electrical ...
Naxos Thira Interconnection - Subsea Cable Laying/Cable Protection
Cyclades Phase D
Adriatic Sea Interconnections - Subsea Cable Laying
The project comprised t the installation of two 110 kV cable systems, a northern part, between Crikvenica – Konjin on the Is. Krk and a southern part, between Dugi Rat – Postira on the Is. Brač. as outlined below: • Northern part: Crikvenica-Konj ...
Lavrion Karystia Project (Greece)
The Lavrio – Karystos project concerns the interconnection of Karystia Wind Farms located at the southern part of Evia Island (Karystia region) to the Mainland Power Transmission System at PPC Lavrion substation. he interconnection will be configured b ...
Cyclades Project - Phase B
The Cyclades Phase B project consists of two interconnections, one between Paros and Naxos and one between Naxos and Mykonos. The Paros-Naxos interconnection has a maximum sea depth of approximately 60 meters and the length of the indicative route is 7 ...
SeaMade OWF Project
The Seastar and Mermaid projects concerns the most northern offshore concession in the designated offshore energy zone in the Belgian EEZ. They are located on the Belgian Continental Shelf, in the Belgian Part of the North Sea (BPNS). The Mermaid site ...
Kriegers Flak BC
The Kriegers Flak BC (Boulder Clearance) project concerns the boulder removal operations at predefined footprints for the subsequent jack-up barge operations for the WTG installation at the Danish Kriegers Flak OWF. This wind farm of 72 locations, ...
Mantoudi-Skiathos Interconnection
The project Mantoudi-Skiathos Interconnection concerns the design, supply and installation of a single circuit 150kV AC Submarine and Underground Transmission Line for the interconnection of Skiathos Island to the Evia Island (Mantoudi), adjacent to Gr ...
Basslink Project
Pirelli Cavi e Sistemi Energia S.p.A. was awarded a Contract by Basslink PTY Ltd. for the supply installation and protection of a 400KV DC submarine cable system between Victoria and Tasmania. Pirelli Cavi e Sistemi Energia S.p.A. as a main contractor ...
Kahramaa Project - Phase 2
Kahramaa (Qatar general Electricity & Water Corporation) had appointed Prysmian Cavi è Sistemi Energia SrL for a power transimission system expansion project, which was to develop the country's first ever submarine power link serving Qatar. Th ...
Hudson River Replacement Project
The Hudson Transmission Project is a 660MW electric transmission link between New York City and New Jersey that was completed in June of 2013. While its main purpose is to provide a new source of electric power for the New York City customers of the Ne ...
GCCIA
The consortium of Nexans Norway AS and Prysmian Cavi e Sistemi SrL was awarded by GCCIA (Gulf Countries Council Interconnection Authority) a contract of an extra high-voltage link to interconnect the power grids of the Kingdom of Saudi Arabia ...
Kafireas Interconnection
The Kafireas project concerns the interconnection of 16 Wind Farms located at the southern part of Evia Island (southeast of Karystos) to the Hellenic mainland Power Grid at Pallini EHV Center (Attica region). The interconnection will be configured by ...
IFA2 HVDC Interconnection France - Angleterre
The IFA2 project concerns the HVDC electricity transmission interconnector between France and England across the English Channel. The French landfall in North of Caen, at Merville-Franceville, in the Baie de Seine, and the English landfall is at Daedal ...
IFA2 – HVAC Cables Offshore Protection
The IFA2 project concerns the HVDC and HVAC electricity transmission interconnector between France and England across the English Channel. In addition to the main HVDC interconnection, there is a HVAC link from the converter station at the main English ...
Rion – Antirion Submarine Cables Installation & Protection
The Rion-Antirrion project concerns the interconnection, between Rion and Antirrion and it is located in Municipality of Patras, Achaia Regional Unit (Peloponnese) and in Municipality of Nafpaktia, Aitoloakarnania Regional Unit (Sterea Hellas) respecti ...
Lavrio – Syros, Nearshore Protection Work & Mattresses
The Lavrio-Syros II project concerns the second interconnection, between Syros and the Greek Mainland (Lavrio, Attica). This project is the third phase of the Interconnection of the Cyclades to the Greek Mainland Grid. In summary, the submarine cable r ...
Evia – Andros – Tinos
The Evia-Andros-Tinos project concerns the islands of Evia, Andros, and Tinos are linked together by four outdated single-core oil-filled AC Submarine Power Cables. Has been planned by IPTO the replacement of the existing power transfer system between ...
Albatros HVAC Connection
The “Albatros” project concerns the HVAC grid connection to the offshore wind farm Albatros. The connection uses the existing “north” Global Tech 1 cable route (Borwin beta - GlobalTech 1) already installed. After the initial pull-in at Albatros OWF pl ...
Deutsche Bucht - Submarine Link Cables Installation and Protection
The DBU project concerns the HVAC submarine link between the AC/DC offshore converter station BorWin beta platform and the Deutsche Bucht offshore wind park, located in the South-West German Bight region of the southern North Sea. The system is compose ...
Global Tech 1 - Submarine Link Cables Installation and Protection
The Global Tech 1 (GT-1) project concerns the realization of a new HVAC grid connection between the offshore substation BorWin Gamma and the grid connection point (OSS) on the OWF Global Tech 1 by jointing the existing cables and new cables. The system ...
Rampion OWF - Export Cable 4
The Rampion Offshore Wind Farm (ROWF) is located in the English Channel, approximately 13km offshore the Sussex coast. The wind farm consists of 116 wind turbines, installed at water depths between 19m and 40m. The maximum total output is 400MW and the ...
Kriegers Flak CGS
Energinet SOV and 50Hertz Transmission GmbH have built a cable connection, consisting of two HVAC cables, between Krieger’s Flak offshore substation KFB (Denmark) and EnBW Baltic 2 offshore substation (Germany). This project is part of the Krieger’s Fl ...
COBRA Project - German Offshore Section
The COBRA cable project consists of the power link between Denmark and The Netherlands and it has been developed by Energinet.dk and TenneT TSO B.V. The purpose of COBRA Cable is to allow for the integration of more renewable energy into the Dutch and ...
BorWin 3 - Pull-in on Platform
BorWin3 project refers to a 900MW DC grid connection system in the North Sea cluster 8 developed by TenneT. The system’s direct current is transmitted from BorWin gamma offshore converter platform to a TenneT substation located in Emden/Ost, through a ...
COBRA Project & BorWin3 Project - Jointing
The COBRA cable project consists of the power link between Denmark and The Netherlands and it has been developed by Energinet.dk and TenneT TSO B.V. The cables system that was installed is composed by: 2 High Voltage Direct Current (HVDC) 1 Fiber ...
Spetses-Spetsopoula Interconnection
The Hellenic Electricity Distribution Network Operator (HEDNO/DEDDHE) has awarded Assodivers Group a contract for the replacement of the power interconnection between Spetses and Spetsopoula at the Argosaronic Gulf in Greece. The cables sys ...
Fecamp OWF (IAC) (France) – Subsea Cable Laying/Cable Protection
In progress ASSO shall perform the route preparation (boulder clearance and PLGR operations), cables installation (cables free laying and pull-in activities) and protection activities by means trenching at 57x array cables and 14x collector cables. The ...
St. Brieuc OWF (IAC) (France) – Subsea Cable Laying/Seabed Preparation
In progress The St. Brieuc Project zone is located off the northwest coast of France, in the bay of St. Brieuc. The proposed development zone is approximately sixteen (16) km from the shore and extends over an area of 103 km². The actual wind farm site ...
Kaskasi II (Germany) - Subsea Cable Laying
The Kaskasi II project concerns the realization of a three-phase AC connection in North-Sea-Cluster 4. The three-phase current generated in the Kaskasi II offshore wind farm is to be transported to the HVDC substation HelWin Beta via two AC subma ...
Viking Link – Subsea Cable Protection
In progress Viking Link is a proposed 1,400MW 760km subsea interconnector between the substation Bicker Fen in Lincolnshire, UK and the substation Revsing in southern Jutland, Denmark. The purpose of the project is the transmission of electrical ...
Naxos Thira Interconnection - Subsea Cable Laying/Cable Protection
Cyclades Phase D
Adriatic Sea Interconnections - Subsea Cable Laying
The project comprised t the installation of two 110 kV cable systems, a northern part, between Crikvenica – Konjin on the Is. Krk and a southern part, between Dugi Rat – Postira on the Is. Brač. as outlined below: • Northern part: Crikvenica-Konj ...
VESSELS
OUR FLEET
Our vessels are meticulously maintained, upgraded, converted and customized as necessary by the Marine Division to suit each work scope that is assigned to them.
Ariadne
DP III - Cable Laying Vessel The Ariadne is a DP-3 Cable Laying Vessel built for worldwide operations, specially designed for power cable laying, protection, and repairs…
Atalanti
DP II - Cable Laying Vessel The Atalanti is a DP-2 Cable Laying Vessel that has been specially designed and engineered for cable laying and protection works…
Athena
DP III - Trenching Support Vessel The Athena is a MarinTeknikk® MT6024 design DP-3 Trenching Support Vessel built for worldwide subsea operations, specially outfitted for supporting a…
Argo
DP II - Trenching Support Vessel The Argo is a DP-2 Trenching Support Vessel built for worldwide operations, specially designed and outfitted for supporting a variety of…
Aethra
DP II - Trenching Support Vessel The Aethra is a DP-2 Trenching Support Vessel built for worldwide operations, specially designed and outfitted for supporting a variety of…
Artemis
DP I - Anchor Handling and Supply Vessel The Artemis is a DP-1 Anchor Handling Tug & Supply Vessel, built in Husum, Germany in 1984. She was…
Astrea
DP II - Multipurpose Support Vessel The Astrea is a DP-2 Multipurpose Support Vessel built for worldwide operations and specially designed for cable laying, protection, and repairs…
Alcyone
Multipurpose Support Vessel The Alcyone is a Multi-Purpose Support Vessel specially built for shallow water operations, in light of her very shallow draft. Provided with ample deck…
Hydna
Multipurpose Support Vessel The Hydna is basically a towing vessel that is mostly used as a Multipurpose Support Vessel for supporting the Group’s shallow water operations within…
EQUIPMENT
OUR CUSTOM EQUIPMENT
Asso.subsea has a range of equipment available for utilisation in the various projects ranging from specialised underwater vehicles to land based excavators and anchilliary machinery. Most of the specialised equipment have been designed and manufactured in out fabrication yard in Elefsina and have been extensively tested in various projects.
AssoTrencher IV Mk13
AssoTrencher IV Mk13 sits at the top of the trenchers range and represents the thirteenth upgrade of the glorious AssoTrencher IV family, whose long track record has…
AssoTrencher V Mk3
Assotrencher V Mk3 is the 3rd version of the AssoTrencher V vehicle from the AssoTrencher series, designed for both shallow and deeper trenching environments. Specifically, the Mk3…
AssoJet III Mk2
The AssoJet III Mk2 is the newest of the ASSO’s jetting ROVs. It is in-house designed & is currently under construction incorporating all the Group’s experience and…
AssoTrencher IV Mk13
AssoTrencher IV Mk13 sits at the top of the trenchers range and represents the thirteenth upgrade of the glorious AssoTrencher IV family, whose long track record has…
AssoTrencher IV Mk12
AssoTrencher IV Mk12 sits at the top of the trenchers' range and is currently undergoing its twelfth upgrade. Its long track record has proven its worth as…
AssoTrencher IV Mk9
AssoTrencher IV Mk9 sits at the top of the mechanical trenchers range as it forms the latest version of the successful trencher series. The AssoTrencher IV 9th…
AssoTrencher V Mk3
Assotrencher V Mk3 is the 3rd version of the AssoTrencher V vehicle from the AssoTrencher series, designed for both shallow and deeper trenching environments. Specifically, the Mk3…
HydroPlow
Asso.subsea Hydroplow is a lightweight jetting sled that is intended for use in tandem with a CLV (Cable Lay Vessel) for SLB (Simultaneous Laying and Burial). Its…
AssoMat II
The 'AssoMat II' is an updated version of its predecessor, the 'AssoMat I'. It is a purpose-built, highly specialized tool used for the installation of protection mattresses…
AssoMat I
The AssoMat I is a system for fast and accurate installation of mattresses and similar products designed for the provision of protection on cables, pipelines, and crossings.…
AssoJet III Mk1
The AssoJet III is the newest of the ASSO’s jetting ROVs. It has been in-house designed & manufactured from the ground up incorporating all of the Group’s…
AssoJet III Mk2
The AssoJet III Mk2 is the newest of the ASSO’s jetting ROVs. It is in-house designed & is currently under construction incorporating all the Group’s experience and…
AssoGrapple II
The Assograpple IΙ is a multi-purpose-built tool designed for seabed intervention. It also incorporates a grapple frame which is focused on increased control and product positioning accuracy.…
AssoGrapple I
The Assograpple I is a purpose-built construction able to remove rocks or similar products, it also incorporates a grapple frame which is focused in increased control and…
Multi-functional Plough
The Multi-Functional Pre-Lay Plough represents the latest investment of ASSO Group in order to cover the constantly evolving underwater protection requirements. The same plough in interchangeable modes…
Atom
'Atom' is an ultra-compact work class ROV comparable in size to an electric ROV system. It is designed to provide underwater manipulative services for operators working in…
Triton XLX
Triton XLX is the ultimate heavy-duty and survey-class ROV. It is designed to provide underwater manipulative services and offers class-leading in-current performance, tooling, and instrument space, and…
Quasar
Quasar is a medium size vehicle in the work-class ROV range. Utilizing the latest multi-platform Curvetech™components, the vehicle offers class-leading in-current performance, tooling and instrument space, and…
Triton XLR
Triton XLR is a 150 hp hydraulic vehicle and consists of high power and heavy duty and survey class ROV. It is designed to provide underwater manipulative…
Venom 3k-200
The 'Venom 3k-200' work-class ROV is designed for heavy subsea construction and survey operations down to a depth of 3,000 meters. Its impeccable track record along with…
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