SUBSEA CABLE REPAIR & MAINTENANCE

Our cable repair solution, AERSUB™, is the first-of-its-kind to repair cables on the seabed

BENEFITS OF AERSUB

Irish Sea Contractors has developed a globally patented subsea cable repair solution called 'AERSUB™'.  AERSUB is designed and built to internationally recognised standards for quality and safety including DNV, IMCA and NORSOK standards relating to diving, equipment and subsea operations.

 

How it works?

Based on our ethos, "anything you can do on land, we can do under the sea", we developed a cable repair solution for the seabed instead of relocating the cable repair to the deck of a ship. Using AERSUB,  we cut the cable in the dry and eliminate the need to lift the cable for repair. Using our own specially trained subsea jointers and commercially available cable joints for any LV/MV/HV cable repair, we can operate in water depths up to 200 m. 

GREATER THAN 50%

cost and time savings compared to traditional 'lift to repair' method

GREATER THAN 60%

carbon emissions reduction per repair versus 'lift to repair' method

24/7
availability

resulting in a faster cable repair response

AERSUB Development Milestones

2016/2017

IDEATION

Irish Sea Contractors participated in multiple offshore wind and subsea cables conferences across Europe and we noticed one theme - cable owners and insurance underwriters commenting on the excessive costs of subsea power cable repair. There started the journey of AERSUB.

2017

CONCEPT DEVELOPMENT

After identifying a need in the cable repair market, Irish Sea Contractors came up with an idea to repair subsea cables on the seabed. As the concept developed, Irish Sea Contractors successfully lodged global patents for AERSUB.

2018

DEVELOPING AERSUB

A design team was assembled and workshops were held with naval architects, certification bodies, marine consultants, boat builders. An AERSUB prototype was developed for use in our Subsea Innovation Facility where we conducted all feasibility studies using certified joints.

2018

SUBSEA CABLE JOINTERS ACADEMY

We developed a comprehensive training programme for subsea jointers. Our subsea personnel received advanced cable jointing training in our Subsea Innovation Facility. This training continues in conjunction with OEMs.

2019

PROTOTYPE UNVEILING

The prototype was unveiled by the Irish Minister of State at the Department of Finance, Michael D’Arcy, to a host of distinguished guests and customers following two days of proof of concept repair demonstration. Watch video.

2021

INVESTMENT

Irish Sea Contractors received funding from Enterprise Ireland, the Irish Government Agency who were voted in 2021 as the top VC investor worldwide by PitchBook.

2020 - Mid-2021

CERTIFICATION

Testing, analysis and procedures have been completed with DNV. Final wet testing scheduled to be completed by mid-2021.

 
Irish Sea Contractors_AERSUB prototype l

Repair demonstration of prototype

In May 2019, the commercial prototype of AERSUB was deployed to undertake a demonstration repair of a 3-core subsea power cable off Rosslare Harbour in Ireland. The weather recorded onsite was Force 7 NNW straight into the harbour with 1.5 m swell–limits which would have caused the cessation of a traditional ‘lift-to-repair’ method.

AERSUB jointers completed the splice of a new 1 m section into one of the power cores which included:

  • four complete joints;

  • twelve fibre optic cable joints;

  • and installation of steel jointing case filled with resin.

Works were completed safely within 12 hours, demonstrating the time and cost efficiencies to be gained through this method. Learnings from this demo were captured and used to develop the prototype further. 

Video of the demo repair at Rosslare Europort