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Marine Construction

We provide worldwide marine construction and commercial diving support services with offices in Australia, Canada, Curacao, Korea, Singapore, Trinidad and the United States.

Subsea Global Solutions has a cadre of industry leading professionals strategically placed within our global network that maintains a broad expertise coupled with site specific local knowledge that will make every construction project a success.  SGS has been actively engaged in commercial diving and marine construction programs sponsored by the US Army Corps of Engineers, the US Navy, Bureau of Reclamation, private and public oil and gas and commercial water front facilities throughout North America and the world. With a worldwide presence providing marine construction and commercial diving support services with offices in Australia, Canada, Curacao, Korea, Singapore, Trinidad and the United States of America. Our team is highly experienced in the precise disciplines required to be immediately productive in a cost-effective way.  SGS has the depth and experience to manage programs from initial engineering, into contract award and all the way to completion and close-out documentation.  SGS maintains in house engineering combined with a diverse array of vetted 3rd party engineering companies that couple together safety, quality assurance, and technical requirements into one efficiently managed project.  SGS personnel are qualified to perform all facets of underwater work and have a track record of providing best value to our clients that spans over 4 decades.

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Case Studies

Hull Breach on Tanker

During cargo operations, a submerged pile pierced through the hull. SGS worked together with owner and class to develop repair plan that included the design and installation of an engineered cofferdam.

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Offshore Oil & Gas

A Blue-Chip oil & gas company incurred several defects and cracks in a critical attachment member of an FPSO’s hull – these defects required repair to allow continued operation.

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Skeg Ripped from Azipod

3 month out of dry dock, galvanic corrosion caused heavy cavitation/erosion damage on PORT and STBD side rudders.

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SGS Reseats Shifted Tailshaft Afloat and Executes a Stern Seal Repair

The client indicated that the tailshaft had shifted aft approximately 200 mm when the ship’s crew was doing maintenance on the shaft coupling. It resulted in the aft water seal losing contact with the liner, causing large amounts of water ingress into the stern tube.

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SGS Completes an Afloat Rudder Stock Seal Replacement

This complex underwater repair was completed to the client's satisfaction in 5 days in conjunction with various other repair works. SGS managed both the underwater and internal portions of this repair to ensure each phase was executed seamlessly.

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Underwater Propeller Blade Straightening – Cold Static Loading

SGS can restore your propeller blades as a permanent repair, to OEM design geometry by cold static loading with our underwater propeller blade press.

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Double Bow Thruster Removal by SGS

The benefits of removing a damaged bow thruster afloat are many. The customer was able to prevent further damage to the bearings and gears caused by the presence of seawater in the gear housing and the procedures allows the units to be overhauled prior to the vessels next dry-dock—or, they can be re-installed afloat by SGS, which would help to eliminate the need for additional tug cost.

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Afloat Bow Thruster Blade Seal Exchange by SGS

The project was executed with two SGS teams working around the clock. While the vessel trimming process was in motion, the team onboard the vessel began to drain the oil from the thruster while the dive team began removing the bow thruster tunnel gratings to gain full access to the bow thruster.

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Scrubber Overboard Spool Pipe Repairs with 5 Year Warranty

The installation of complete SOx scrubber systems is entirely possible without taking the vessel out of the water. SGS’s involvement is focused on precision cutting of the hull penetrations for the sea chest openings and overboard spool pipe installation below the waterline.

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SGS solves serious problems: Assisting a large, fully laden post-Panamax container vessel with steering issues

SGS solves serious problems: Assisting a large fully laden Post-Panamax container vessel with steering issues. SGS works with port authorities, class, and manufacturers to provide class-approved in-water float out removal, repair, and refit of a 110 mt rudder. Find out how our underwater inspection and survey services deliver practical, cost-effective solutions to a complex offshore problem. SGS works with port authorities, class, and manufacturers to provide class-approved in-water rudder float out removal, repair, and refit of a 110 mt rudder. Helping owners safely reduce their risk exposure and related costs that would include diversions, delays, and downtime.

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Galvanic Corrosion on Rudders

3 months out of dry dock, galvanic corrosion caused heavy cavitation/ erosion damage on PORT and STBD side rudders.

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Marine Construction

Hull Cleaning

Subsea Global Solutions has a cadre of industry leading professionals strategically placed within our global network that maintains a broad expertise coupled with site specific local knowledge that will make every construction project a success.  SGS has been actively engaged in commercial diving and marine construction programs sponsored by the US Army Corps of Engineers, the US Navy, Bureau of Reclamation, private and public oil and gas and commercial water front facilities throughout North America and the world. With a worldwide presence providing marine construction and commercial diving support services with offices in Australia, Canada, Curacao, Korea, Singapore, Trinidad and the United States of America. Our team is highly experienced in the precise disciplines required to be immediately productive in a cost-effective way.  SGS has the depth and experience to manage programs from initial engineering, into contract award and all the way to completion and close-out documentation.  SGS maintains in house engineering combined with a diverse array of vetted 3rd party engineering companies that couple together safety, quality assurance, and technical requirements into one efficiently managed project.  SGS personnel are qualified to perform all facets of underwater work and have a track record of providing best value to our clients that spans over 4 decades.

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