Two Specialist Personnel

Experienced - Key Disciplines - Placed Globally


OWTIS Wind Turbine Installation Ship


OWTIS™ - HydroNAS™

50 Ton Horizontal Pipelay System


Design - Build - Mobilise

Harkand Haldene Newbuild DSV


Design - Build - Integrate -
Life Extension - Specialist Personnel


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Foundation Stabilisation Tool

Inflatable Packer - Stabilising Grouted Connections

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HydroNAS icon

Proven, Lightweight, High Performing and Cost Effective Underwater Noise Mitigation

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Engineering & Design

Mechanical, Structural and Installation Engineering

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Diving Equipment & Personnel

New Build - Vessel Conversion - Life Extension - Reclassification - Dive System Design

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Pipeline System Design & Mobilisation

Horizontal Lay System - Vertical Lay System - Capstan Reel System

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Safe and Cost Effective Wind Turbine Foundation Installation Vessel

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Crew Access Bridge - CRAB

Offshore Access Gangway - Deployable From a Floating Vessel - Lightweight,

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Tier 1 Subsea Contractor Project Manager

  • “We rate the delivery of the end product as quality, to a high standard. Therefore we confirm that W3G Marine, in our view, is rated as a high standard engineering company with excellent expertise in our field of activities.”

Regional Projects Execution Director, DOF Subsea

  • “Within 6 months from project kick off W3G Marine had successfully specified, designed, built and mobilised a highly effective and safe 50t horizontal pipelay spread which was sucessfully deployed to reinstate a subsea infrastructure... we are extremely satisfied by the service provided by W3G Marine”

Our Clients

  • Wood logo
  • Total Logo
  • Cobrawind Logo
  •  Global Energy Group Logo
  • Cadherent Logo
  • Keppel Logo
  • DOF Subsea Logo
  • Fisher Logo
  • Subsea 7 Logo
  • Sea Green Wind Energy Logo
  • kongsberg logo
  • SSE Logo
  • VARD Logo
  • KOWL Logo
  • n 01.11 Ocean Onstaller Logo
  • Harkand Logo
  • Cutting Underwater Thecnologies Logo
  • n 01.11 Ocean Onstaller Logo
  • Harkand Logo

Latest News

  • HydroNAS News
25dB SEL Underwater Noise Reduction Achieved By HydroNAS™

Supported by Vattenfall and GeoSea, W3G Marine recently achieved an underwater noise reduction of 25dB in SEL (Sound Exposure Level) and 35dB in peak pressure using its patented HydroNAS™ system. The trial was conducted during the installation of a 5m diameter monopile with no energy restriction, using an S1200 hammer.
The result confirms numerical modelling conducted by the world renowned ISVR at Southampton University and follows three other successful scale trials and four years of development work. The trial was configured to measure the transmission loss through the walls of the HydroNAS™ barrier and did not consider aspects of seabed noise transmission. HydroNAS™ is a cost effective solution for piling noise mitigation which is installed off the main vessel critical path and requires minimal deck space.

18 May 2015