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Underwater Rudder/Stabilizer Exchanges & Repairs

Subsea Global Solutions has revolutionized the underwater methods of repair of rudders and stabilizers. By using underwater cofferdams (either atmospheric or hyperbaric), fully approved mechanical or weld repairs can be performed to rudders and stabilizers.

Subsea Global Solutions has revolutionized the underwater methods of repair of rudders and stabilizers. By using underwater cofferdams (either atmospheric or hyperbaric), fully approved mechanical or weld repairs can be performed to rudders and stabilizers. If underwater removal or extraction is required for a rudder or stabilizer, Subsea Global Solutions floats damaged stabilizers or rudders away from the vessel using the aqueous environment as a crane. Buoyancy control solutions have been developed for underwater lifts up to 300 tons. Underwater seal replacement, including bonding of new seal rings, is possible for stabilizers without taking the vessel out of service.

Permanent  underwater wet weld repairs  to eroded rudder surfaces and weld seams, dewatering of rudder blades and mechanical repairs to Hi-Lift rudders is all available globally through the expert technicians of Subsea Global Solutions.

Looking for Underwater Maintenance & Repair Services?

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Rudder Repair

  • Rudder Blade repair, removal or installation
  • Rudder Stock repair, removal or installation
  • Rudder pintle bushing and shaft replacement
  • Rudder Horn repair
  • Rudder Flap repair, removal, installation or isolation
  • Permanent underwater wet weld repairs to erosion or cavitation  damage, after a case by case class approval

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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Stabilizer Repair

  • Stabilizer crux repair
  • Seal replacement
  • Flap repair or isolation
  • Complete fin removal and replacement

Underwater Rudder/Stabilizer Exchanges & Repairs

Hull Cleaning

Subsea Global Solutions has revolutionized the underwater methods of repair of rudders and stabilizers. By using underwater cofferdams (either atmospheric or hyperbaric), fully approved mechanical or weld repairs can be performed to rudders and stabilizers. If underwater removal or extraction is required for a rudder or stabilizer, Subsea Global Solutions floats damaged stabilizers or rudders away from the vessel using the aqueous environment as a crane. Buoyancy control solutions have been developed for underwater lifts up to 300 tons. Underwater seal replacement, including bonding of new seal rings, is possible for stabilizers without taking the vessel out of service.

Permanent  underwater wet weld repairs  to eroded rudder surfaces and weld seams, dewatering of rudder blades and mechanical repairs to Hi-Lift rudders is all available globally through the expert technicians of Subsea Global Solutions.

Rudder Repair

  • Rudder Blade repair, removal or installation
  • Rudder Stock repair, removal or installation
  • Rudder pintle bushing and shaft replacement
  • Rudder Horn repair
  • Rudder Flap repair, removal, installation or isolation
  • Permanent underwater wet weld repairs to erosion or cavitation  damage, after a case by case class approval

Stabilizer Repair

  • Stabilizer crux repair
  • Seal replacement
  • Flap repair or isolation
  • Complete fin removal and replacement

Looking for underwater maintenance and repair services?

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