Underwater Hull Cleaning, Hull Grooming, & Niche Area Cleaning
Commercial Diving Services 24/7 — Americas: +1-305-571-9700 Europe: +32-3-541-45-41 Asia: +65-6397-5808
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According to the International Council on Clean Transportation (ICCT), hull cleaning can reduce gas emissions in a range of 1%-10%. The same can be said for propeller polishing which can reduce gas emissions by 2% - 5% and when executed on a regular periodical basis; 2.5% - 8%. With the new regulations being adopted by the IMO in 2023 regarding decarbonization through ship emissions, a trusted underwater service partner who can deliver reliable services around the globe will be paramount to ensure your vessel performance remains in the Carbon Intensity Index (CII) acceptable range of A,B, or C. Subsea Global Solutions has several solutions available for Biofouling/Coating Management, Environmentally Friendly Hull maintenance and Propeller Polishing.
Subsea Global Solutions understands the constraints established by regulatory bodies around the world. We develop biofouling and maintenance management procedures that comply with the requirements of the local port, individual state or international environmental regulatory bodies.
Subsea Global Solutions has developed Biofouling Management Plans as well as Ship Hull Cleaning and Propeller Maintenance management procedures for locations that previously banned this type of service. By addressing the concerns raised by the regulatory bodies and putting in mitigation plans, Subsea Global Solutions has been granted procedure approval for the hull maintenance of some coatings with vessels that are managed as a part of our Fuel Management Program; assuring minimal fouling (micro-fouling only).
Subsea Global Solutions has also worked closely with regulators in New Zealand to develop Niche Cleaning Processes as well as approved biofouling and niche area inspection reports that can be used as documented evidence of Niche Area Inspections performed according to recently established guidelines. By managing the vessels biofouling, and the hull and propeller maintenance, Subsea Global Solutions is able to provide an approved maintenance program that drives down an operator's operating cost and improves vessel efficiency.
For locations with regulations focused on Aquatic Invasive Species (IAS) and the release of particulates to the environment, Subsea Global Solutions developed the EnviroHull. It features a spoils recovery vacuum system and spoils filtration system that processes the water on the surface in a contained system and returns filtered water back to the environment. This system has been tested successfully in Alameda, California and is also approved for use in Busan, South Korea. The EnviroHull system is a multi-stage filtration system capable of operating continuously during underwater hull cleaning, niche area cleaning or propeller polishing. The EnviroHull system is always considered for locations that require biofouling management, hull cleaning spoils recovery, and particulate matter filtration. The EnviroHull technology is compact, simple and easy to operate in either a trailer mounted or vessel mounted configuration.
Enjoy our short trailer on Offshore Asset Maintenance services.
Enjoy our short trailer on our Cleaning Remote Operated Vehicle, the PORTABLE C-ROV, ideally suited for heavier macrofouling before repositioning your vessel or offshore asset.
Subsea Global Solutions was engaged to perform an emergency underwater shaft seal repair on a mid-size cruise vessel docked in Eleusis, Greece.
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Subsea Global Solutions' Whitney McDonald Shares Her Journey in Welding and Diving with AWS Cincinnati.
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We're proud to spotlight Uwe Aschemeier, our Head of Welding Services. With extensive experience as a commercial diver, Uwe is also an award-winning educator and a respected speaker in the underwater welding industry, known for his dedication to advancing industry standards and sharing his expertise worldwide.
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In October, Subsea Global Solutions held its advanced underwater welding training course in our training center in Long Beach, providing a comprehensive 10-day program designed to hone practical skills and qualify participants for new joint geometries and/or new welding positions.
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Underwater welding, especially underwater wet welding, is gaining more and more acceptance. This article from Welding & Cutting Magazine takes a deep dive into types, procedures, and codes.
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Subsea Global Solutions executes underwater wet welding on a cruise ship, restoring structural strength while minimizing downtime.
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During cargo operations, a submerged pile pierced through the hull of a tanker. Subsea Global Solutions worked together with owner and class to develop repair plan that included the design and installation of an engineered cofferdam without the need for costly drydock delays.
View Full Case Study
A Blue-Chip oil & gas company incurred several defects and cracks in a critical attachment member of an FPSO’s hull – Subsea Global Solutions provided these defects the repairs required to allow continued operation.
View Full Case Study
Design flaws together with poor workmanship caused the bilge keel to fracture during operation in several locations. Subsea Global Solutions worked together with the owner and Class to perform permanent underwater wet weld repair on the fractures, without interrupting the production.
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Subsea Global Solutions divers executed a complex underwater oil leak repair on a ferry in Canada, showcasing precision and compliance in marine repair solutions.
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Subsea Global Solutions removes obstructive anchor chain debris underwater, enabling safe vessel departure and minimizing operational delays.
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Subsea Global Solutions completes a complex double bow thruster removal, showcasing expertise in underwater engineering and vessel support.
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Subsea Global Solutions delivers an afloat bow thruster repair, restoring full functionality and minimizing downtime for vessel operators.
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The installation of complete SOx scrubber systems is entirely possible without taking the vessel out of the water. Subsea Global Solutions' 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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Subsea Global Solutions delivers turnkey scrubber installations without drydocking. Reduce emissions and stay compliant with minimal vessel downtime.
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When a roll-on/roll-off ship (RO-RO) required an immediate thruster installation and rudder bushing repairs, Subsea Global Solutions stepped in to deliver a seamless in-water solution.
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Subsea Global Solutions (SGS) recently completed a challenging underwater repair for a commercial ship owner whose vessel had suffered severe grounding damage including a badly damaged propeller, partial loss of the rudder horn, rudder damage, and even...
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DryDock Magazine recently interviewed Harun (Aaron) Duzgoren (CCO), and Kevin Peters (Director, Technical Sales & Environmental Services) about a significant 100+ tonne rudder repair operation carried out afloat on a fully laden mainline container vessel.
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Subsea Global Solutions was called to assist a large, fully-laden Post-Panamax container vessel that developed steering gear problems. We quickly resolved the problem and got the ship back on track.
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Subsea Global Solutions repairs galvanic corrosion on both PORT and STBD side rudders on a vessel only 3 months out of dry dock.
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Subsea Global Solutions completes a marine dredging project to improve mooring access, ensuring safer and more efficient vessel operations.
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When a propeller sustains damage beyond the straightening capabilities of even the largest press equipment, hydrodynamic corrections offer an innovative and effective solution.
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Not all propeller damage can be straightened. When blades are fractured, chipped, or excessively bent, cropping becomes necessary. However, cropping an odd-numbered blade propeller presents unique challenges that must be carefully managed.
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Subsea Global Solutions’ proprietary propeller straightening technology offers a far more efficient and cost-effective alternative to blade cropping.
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Discover how Subsea Global Solutions swiftly resolved propeller damage for a heavy-load carrier in Palm Beach, restoring performance and efficiency with precision repairs.
View Full Case StudySubsea Global Solutions (SGS) recently completed a challenging underwater repair for a commercial ship owner whose vessel had suffered severe grounding damage including a badly damaged propeller, partial loss of the rudder horn, rudder damage, and even...
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Discover how Subsea Global Solutions restored efficiency with underwater propeller blade straightening using cold static loading.
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Following contact damage, Subsea Global Solutions delivers expert underwater propeller blade replacement to restore vessel performance quickly.
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: From cropping to polishing, Subsea Global Solutions delivers precision propeller repairs worldwide, restoring performance and efficiency fast.
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Subsea Global Solutions was tasked with completing a routine propeller polishing and hull inspection for a commercial vessel docked at the Port of Palm Beach. This service, part of the vessel’s ongoing maintenance schedule, ensured optimal performance and efficiency.
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A big thank you to Captain Kate for sharing a behind-the-scenes look at Subsea Global Solutions in action on a propeller polishing project.
View Full Case StudyDiscover how Subsea Global Solutions swiftly resolved propeller damage for a heavy-load carrier in Palm Beach, restoring performance and efficiency with precision repairs.
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By utilizing a multi-stage polishing process and diver / technicians trained in the proper analysis of the propeller condition, Subsea Global Solutions' process has proven to be an integral part of fuel efficiency programs. The benefits of maintaining a polished propeller have been known for years, but what has not been known is "how smooth is smooth"?
View Full Case StudySubsea Global Solutions was engaged to perform an emergency underwater shaft seal repair on a mid-size cruise vessel docked in Eleusis, Greece.
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Faced with a critical shaft seal leak, Subsea Global Solutions performed an afloat repair at the Galveston City Docks—overcoming logistical delays and environmental challenges to restore the vessel without dry docking.
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Subsea Global Solutions was called upon to perform a critical underwater stern seal exchange on a tanker docked in Curacao. Facing significant oil leakage, the client urgently needed a trusted partner with the expertise and resources to complete the repair efficiently, safely, and without disrupting the vessel's schedule.
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Learn how SGS performs stern tube and shaft seal replacements underwater minimizing downtime and avoiding costly drydocking.
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Subsea Global Solutions completed a successful twin shaft seal repair in the South Pacific minimizing downtime with expert underwater solutions.
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Subsea Global Solutions divers performed a stern seal repair on a bulk carrier in Romania, delivering safe, efficient results without drydocking.
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Subsea Global Solutions provides proactive underwater inspection & maintenance programs for offshore oil & gas operators—helping extend asset life, reduce risk & meet class requirements.
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Subsea Global Solutions helps offshore oil & gas operators manage biofouling risks with diver & ROV cleaning, inspections, and regulatory-compliant solutions—boosting efficiency and reducing downtime.
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Subsea Global Solutions delivers rapid, class-approved underwater repairs for the offshore oil & gas industry—reducing downtime and eliminating costly dry-docking. Learn how our global teams support critical assets 24/7.
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In 2024, Subsea Global Solutions completed a complex overhaul of eight thrusters on the La Muralla oil rig, led by our Curaçao-based team, ensuring the rig's peak performance through rapid, on-site servicing.
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Class approved shell plate underwater damage repairs to offshore semi-submersible platform without drydocking.
View Full Case StudyDryDock Magazine recently interviewed Harun (Aaron) Duzgoren (CCO), and Kevin Peters (Director, Technical Sales & Environmental Services) about a significant 100+ tonne rudder repair operation carried out afloat on a fully laden mainline container vessel.
View Full Case StudyThe installation of complete SOx scrubber systems is entirely possible without taking the vessel out of the water. Subsea Global Solutions' involvement is focused on precision cutting of the hull penetrations for the sea chest openings and overboard spool pipe installation below the waterline.
View Full Case StudyDuring cargo operations, a submerged pile pierced through the hull of a tanker. Subsea Global Solutions worked together with owner and class to develop repair plan that included the design and installation of an engineered cofferdam without the need for costly drydock delays.
View Full Case StudyA Blue-Chip oil & gas company incurred several defects and cracks in a critical attachment member of an FPSO’s hull – Subsea Global Solutions provided these defects the repairs required to allow continued operation.
View Full Case StudyDesign flaws together with poor workmanship caused the bilge keel to fracture during operation in several locations. Subsea Global Solutions worked together with the owner and Class to perform permanent underwater wet weld repair on the fractures, without interrupting the production.
View Full Case StudyLearn how SGS performs stern tube and shaft seal replacements underwater minimizing downtime and avoiding costly drydocking.
View Full Case StudySubsea Global Solutions completed a successful twin shaft seal repair in the South Pacific minimizing downtime with expert underwater solutions.
View Full Case Study
Subsea Global Solutions conducted a major biofouling cleaning campaign in Korea, improving vessel efficiency and reducing fuel consumption.
View Full Case StudyDryDock Magazine recently interviewed Harun (Aaron) Duzgoren (CCO), and Kevin Peters (Director, Technical Sales & Environmental Services) about a significant 100+ tonne rudder repair operation carried out afloat on a fully laden mainline container vessel.
View Full Case StudyThe installation of complete SOx scrubber systems is entirely possible without taking the vessel out of the water. Subsea Global Solutions' involvement is focused on precision cutting of the hull penetrations for the sea chest openings and overboard spool pipe installation below the waterline.
View Full Case StudySubsea Global Solutions executes underwater wet welding on a cruise ship, restoring structural strength while minimizing downtime.
View Full Case StudyDiscover how Subsea Global Solutions restored efficiency with underwater propeller blade straightening using cold static loading.
View Full Case StudySubsea Global Solutions completes a complex double bow thruster removal, showcasing expertise in underwater engineering and vessel support.
View Full Case StudySubsea Global Solutions delivers an afloat bow thruster repair, restoring full functionality and minimizing downtime for vessel operators.
View Full Case StudyFollowing contact damage, Subsea Global Solutions delivers expert underwater propeller blade replacement to restore vessel performance quickly.
View Full Case StudyLearn how SGS performs stern tube and shaft seal replacements underwater minimizing downtime and avoiding costly drydocking.
View Full Case Study
Subsea Global Solutions completed a complex aft shaft bearing repair in Hong Kong proving no challenge is too difficult for our underwater repair experts.
View Full Case Study: From cropping to polishing, Subsea Global Solutions delivers precision propeller repairs worldwide, restoring performance and efficiency fast.
View Full Case StudySubsea Global Solutions completed a successful twin shaft seal repair in the South Pacific minimizing downtime with expert underwater solutions.
View Full Case StudySubsea Global Solutions conducted a major biofouling cleaning campaign in Korea, improving vessel efficiency and reducing fuel consumption.
View Full Case StudyDryDock Magazine recently interviewed Harun (Aaron) Duzgoren (CCO), and Kevin Peters (Director, Technical Sales & Environmental Services) about a significant 100+ tonne rudder repair operation carried out afloat on a fully laden mainline container vessel.
View Full Case StudySubsea Global Solutions was called to assist a large, fully-laden Post-Panamax container vessel that developed steering gear problems. We quickly resolved the problem and got the ship back on track.
View Full Case StudyThe installation of complete SOx scrubber systems is entirely possible without taking the vessel out of the water. Subsea Global Solutions' involvement is focused on precision cutting of the hull penetrations for the sea chest openings and overboard spool pipe installation below the waterline.
View Full Case StudySubsea Global Solutions repairs galvanic corrosion on both PORT and STBD side rudders on a vessel only 3 months out of dry dock.
View Full Case StudySubsea Global Solutions executes underwater wet welding on a cruise ship, restoring structural strength while minimizing downtime.
View Full Case StudyDuring cargo operations, a submerged pile pierced through the hull of a tanker. Subsea Global Solutions worked together with owner and class to develop repair plan that included the design and installation of an engineered cofferdam without the need for costly drydock delays.
View Full Case StudyDiscover how Subsea Global Solutions restored efficiency with underwater propeller blade straightening using cold static loading.
View Full Case StudyDesign flaws together with poor workmanship caused the bilge keel to fracture during operation in several locations. Subsea Global Solutions worked together with the owner and Class to perform permanent underwater wet weld repair on the fractures, without interrupting the production.
View Full Case Study
Subsea Global Solutions reseats a shifted tailshaft afloat and executes a stern seal repair, ensuring vessel reliability without drydock.
View Full Case StudySubsea Global Solutions completes a complex double bow thruster removal, showcasing expertise in underwater engineering and vessel support.
View Full Case StudySubsea Global Solutions delivers an afloat bow thruster repair, restoring full functionality and minimizing downtime for vessel operators.
View Full Case Study
Subsea Global Solutions completes a turnkey SOx scrubber spool pipe replacement with a 5-year coating warranty, ensuring compliance and reliability.
View Full Case Study
Subsea Global Solutions executes a precise underwater hull fracture repair near the bilge keel, restoring vessel integrity and safety in Tacoma, Washington.
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Subsea Global Solutions completes a successful afloat rudder seal replacement, providing efficient underwater repair without drydocking delays.
View Full Case Study
Subsea Global Solutions repairs and restores a heavily corroded rudder, extending service life and maintaining vessel safety.
View Full Case StudyFollowing contact damage, Subsea Global Solutions delivers expert underwater propeller blade replacement to restore vessel performance quickly.
View Full Case StudyLearn how SGS performs stern tube and shaft seal replacements underwater minimizing downtime and avoiding costly drydocking.
View Full Case StudySubsea Global Solutions completed a complex aft shaft bearing repair in Hong Kong proving no challenge is too difficult for our underwater repair experts.
View Full Case Study: From cropping to polishing, Subsea Global Solutions delivers precision propeller repairs worldwide, restoring performance and efficiency fast.
View Full Case StudySubsea Global Solutions completed a successful twin shaft seal repair in the South Pacific minimizing downtime with expert underwater solutions.
View Full Case StudySubsea Global Solutions divers performed a stern seal repair on a bulk carrier in Romania, delivering safe, efficient results without drydocking.
View Full Case StudySubsea Global Solutions conducted a major biofouling cleaning campaign in Korea, improving vessel efficiency and reducing fuel consumption.
View Full Case StudySubsea Global Solutions divers executed a complex underwater oil leak repair on a ferry in Canada, showcasing precision and compliance in marine repair solutions.
View Full Case StudySubsea Global Solutions completes a marine dredging project to improve mooring access, ensuring safer and more efficient vessel operations.
View Full Case StudyFor locations where diver operated systems are considered unsuitable, Subsea Global Solutions operates remote operated vehicles, simply called the cleaning ROV, or C-ROV/CROV for short. There are two main in-house designed and built systems currently used, which comply with local authority requirements and regulations.
ECOFRIENDLY C-ROV, uses filtration systems with low- and high-pressure filtration, and UV treatment. These are designed for elimination of biofouling and prevent aquatic invasive species transfer, the systems use a reclaim system for in-water cleaning and capture (IWCC), with multi-stage filtration of particulate matter down to 1 micron and render waste effluent “inert” prior to cleaned water return. The biofouling waste retrieved is recycled within a certified biomass to biofuel process. To comply with our own internal policies periodical water sampling is also undertaken, with samples evaluated by external certified analysis. This configuration is medium truck transportable, and can be run from quayside, workboat or barge mounted - making it suitable for regional use if required.
PORTABLE C-ROV, this highly portable and air transportable variant forgoes the reclaim system as these are deployed to clean vessels and vessel-like structures on location, before they move, these units are also capable of cleaning heavy macrofouling. Typically deployed for offshore units like semi-submersibles, Floating Production Storage and Offtake (FPSO) and FSO’s, their high-definition real-time video also acts as part of an underwater inspection team when deployed with our Observation ROV’s which are able to access niche areas underwater, or as part of a combined ROV and diver project team.
For locations with regulations focused on invasive species and the potential release to the Environment of matter in either a particulate or solution form, Whale Shark Technologies LTD (WET) (a Wholly owned Engineering company of Subsea Global Solutions) has developed the Whale Shark. It features a spoils recovery vacuum system, spoils filtration system and water treatment system that extracts metals from solution. Once water passes through Whale Shark, filtered and treated water returns to the environment. This system has been developed and is being tested with good success in Vancouver Canada, impaired water-ways in Baltimore, MD, Alameda and Oakland California, as the only participant in the US Government sponsored IWCC (In-Water Cleaning and Capture Technology) study.
The Whale Shark system is a multistage mechanical filtration system combined with a water treatment plant capable of operating continuously during Hull cleaning operations. The system has the capability to filter particulates in solution down to 1 micron and remove soluble metals (like copper and zinc) in solution. The Whale shark system should be considered for locations that require biofouling management, Hull Cleaning, spoils recovery with particulate filtration, and water treatment to reduce or eliminate all metals (particulate or soluble) released during underwater hull Cleaning or propeller maintenance from re-entering into the environment. This system requires a large truck-based trailer or barge mounted configuration which makes it suitable for regional use if required.
The Beluga Eco-friendly cleaning system was designed to manage the ever increasing threat of invasive species and—if needed, to also treat soluble metals that may be present in effluent water. With filtration capabilities currently down to 5 microns, the Beluga system has interchangeable tools that can be connected to it for the execution of hull niche area cleaning or eco-friendly propeller polishing.
According to the International Council on Clean Transportation (ICCT), hull cleaning can reduce gas emissions in a range of 1%-10%. The same can be said for propeller polishing which can reduce gas emissions by 2% - 5% and when executed on a regular periodical basis; 2.5% - 8%. With the new regulations being adopted by the IMO in 2023 regarding decarbonization through ship emissions, a trusted underwater service partner who can deliver reliable services around the globe will be paramount to ensure your vessel performance remains in the Carbon Intensity Index (CII) acceptable range of A,B, or C. Subsea Global Solutions has several solutions available for Biofouling/Coating Management, Environmentally Friendly Hull maintenance and Propeller Polishing.
Subsea Global Solutions understands the constraints established by regulatory bodies around the world. We develop biofouling and maintenance management procedures that comply with the requirements of the local port, individual state or international environmental regulatory bodies.
Subsea Global Solutions has developed Biofouling Management Plans as well as Ship Hull Cleaning and Propeller Maintenance management procedures for locations that previously banned this type of service. By addressing the concerns raised by the regulatory bodies and putting in mitigation plans, Subsea Global Solutions has been granted procedure approval for the hull maintenance of some coatings with vessels that are managed as a part of our Fuel Management Program; assuring minimal fouling (micro-fouling only).
Subsea Global Solutions has also worked closely with regulators in New Zealand to develop Niche Cleaning Processes as well as approved biofouling and niche area inspection reports that can be used as documented evidence of Niche Area Inspections performed according to recently established guidelines. By managing the vessels biofouling, and the hull and propeller maintenance, Subsea Global Solutions is able to provide an approved maintenance program that drives down an operator's operating cost and improves vessel efficiency.
For locations with regulations focused on Aquatic Invasive Species (IAS) and the release of particulates to the environment, Subsea Global Solutions developed the EnviroHull. It features a spoils recovery vacuum system and spoils filtration system that processes the water on the surface in a contained system and returns filtered water back to the environment. This system has been tested successfully in Alameda, California and is also approved for use in Busan, South Korea. The EnviroHull system is a multi-stage filtration system capable of operating continuously during underwater hull cleaning, niche area cleaning or propeller polishing. The EnviroHull system is always considered for locations that require biofouling management, hull cleaning spoils recovery, and particulate matter filtration. The EnviroHull technology is compact, simple and easy to operate in either a trailer mounted or vessel mounted configuration.
For locations where diver operated systems are considered unsuitable, Subsea Global Solutions operates remote operated vehicles, simply called the cleaning ROV, or C-ROV/CROV for short. There are two main in-house designed and built systems currently used, which comply with local authority requirements and regulations.
ECOFRIENDLY C-ROV, uses filtration systems with low- and high-pressure filtration, and UV treatment. These are designed for elimination of biofouling and prevent aquatic invasive species transfer, the systems use a reclaim system for in-water cleaning and capture (IWCC), with multi-stage filtration of particulate matter down to 1 micron and render waste effluent “inert” prior to cleaned water return. The biofouling waste retrieved is recycled within a certified biomass to biofuel process. To comply with our own internal policies periodical water sampling is also undertaken, with samples evaluated by external certified analysis. This configuration is medium truck transportable, and can be run from quayside, workboat or barge mounted - making it suitable for regional use if required.
PORTABLE C-ROV, this highly portable and air transportable variant forgoes the reclaim system as these are deployed to clean vessels and vessel-like structures on location, before they move, these units are also capable of cleaning heavy macrofouling. Typically deployed for offshore units like semi-submersibles, Floating Production Storage and Offtake (FPSO) and FSO’s, their high-definition real-time video also acts as part of an underwater inspection team when deployed with our Observation ROV’s which are able to access niche areas underwater, or as part of a combined ROV and diver project team.
For locations with regulations focused on invasive species and the potential release to the Environment of matter in either a particulate or solution form, Whale Shark Technologies LTD (WET) (a Wholly owned Engineering company of Subsea Global Solutions) has developed the Whale Shark. It features a spoils recovery vacuum system, spoils filtration system and water treatment system that extracts metals from solution. Once water passes through Whale Shark, filtered and treated water returns to the environment. This system has been developed and is being tested with good success in Vancouver Canada, impaired water-ways in Baltimore, MD, Alameda and Oakland California, as the only participant in the US Government sponsored IWCC (In-Water Cleaning and Capture Technology) study.
The Whale Shark system is a multistage mechanical filtration system combined with a water treatment plant capable of operating continuously during Hull cleaning operations. The system has the capability to filter particulates in solution down to 1 micron and remove soluble metals (like copper and zinc) in solution. The Whale shark system should be considered for locations that require biofouling management, Hull Cleaning, spoils recovery with particulate filtration, and water treatment to reduce or eliminate all metals (particulate or soluble) released during underwater hull Cleaning or propeller maintenance from re-entering into the environment. This system requires a large truck-based trailer or barge mounted configuration which makes it suitable for regional use if required.
The Beluga Eco-friendly cleaning system was designed to manage the ever increasing threat of invasive species and—if needed, to also treat soluble metals that may be present in effluent water. With filtration capabilities currently down to 5 microns, the Beluga system has interchangeable tools that can be connected to it for the execution of hull niche area cleaning or eco-friendly propeller polishing.
