Category Archives: Interesting Projects

My Stabilizer sprung a leak!- Underwater Crux Seal exchange

DSC00126While cruising the beautiful waters of the Mediterranean Sea, water ingress was reported on one of the vessel’s stabilizer fins.  After consultation with the equipment manufacturer it was determined that an in-water inspection and potential repair was required.  With no experience performing this type of repair underwater, the client and Original Equipment manufacturer turned to Subsea Global Solutions for support.  Mobilizing from our location in The Netherlands, Diver / Technicians arrived in Italy to closely inspect and repair the stabilizer crux seal package due to this leakage.

Initially the upper retaining ring to the stabilizer crux seal package was removed.  The first seal package was replaced underwater with spare parts found on board.  With the seal package properly installed and properly positioned, the retaining ring was reinstalled and torqued to manufacturer’s specifications.  The Inspection continued to the lower crux seal assembly.  Upon inspection, damage to the seal package was reported by the Diver / Technicians.  A portion of the first seal package was seen protruding past the retaining ring between the crux and retaining ring.  The lower retaining ring was removed, and the first seal package was removed.    After removing the first seal package an abnormality was seen by the diver / technicians so more seal rings were removed.  All seals were removed and it was determined that the #4 last hard seal split ends were overlapping rather than being flush.  This defective seal was removed, and cut to the proper length.  With the seal properly installed, the diver / technicians replaced the remaining seals.  With all seal packs properly installed the lower retaining ring was reinstalled and torqued to the Manufacturers specifications.  The vessel continued on it’s voyage without any interruption to the schedule with it’s crux seal leakage repaired!

Subsea Global Solutions again delivers unrivaled service.  Considering the fact that the Original Equipment Manufacturer never before performed a repair of this magnitude underwater, we have developed yet another new process of repair.  With our in-house engineering and experienced operations teams available 24 / 7, developing unique installation specific repair procedures is business as usual.  This client and Original Equipment Manufacturer continue to enjoy the quality and dedication to serve of each and every member within the Subsea Global Solutions’ team.  Let us demonstrate to you what we can do!

Tunnel thruster out – Tunnel thruster in- All in a day’s work!

Carnival Magic-Aug 201325Subsea Global Solutions remains focused on delivering unrivaled service to its clients around the world.  When cruise vessels require underwater equipment maintenance and repair, our team of highly skilled diver / technicians dive into action to support their needs.  While keeping the vessel in service Subsea Global Solutions followed a detailed time line in order to exchange a damaged tunnel thruster lower gear box before the vessel reached a location requiring it’s use.

Carnival Magic-Aug 201334Working from the vessel’s shell lock door, Subsea Global Solutions set up the mobile dive station  and equipment while at sea one day prior to the start of operations.  Once in the first port of call, the diver technicians dove into action.  Preparatory operations began with the installation of load rated pad eyes at strategic locations along the ships hull and inside the thruster tunnel.  All Welding was done by coded “A” class wet welders under Subsea Global Solutions’ class approved wet welding procedure.  In parallel, other diver / welders began the weld installation process of rigging equipment for Subsea Global Solutions Flex door system.  The Flex door system allows our team to “dewater” the thruster tunnel and create a dry environment for underwater service.  In parallel to underwater operations, diver / technicians worked together with other contractors and the ship’s crew to rig the electrical motor off of the thruster motor foundation, prepare the tunnel thruster for underwater demounting and preliminarily installed the internal cofferdam “The Dome”.  With preparatory work completed, the extraction process began.

Carnival Magic-Aug 201332Subsea Global Solutions began the extraction process by gouging away the tunnel thruster stay plate utilizing a carbon arc gouging system.  In parallel, underwater and internal rigging was installed on the tunnel thruster lower gear box.  In the thruster room, the diver / technicians removed the thruster mounting bolts.  The stay plate was then completely cut and removed.    The thruster lower gear box was rigged away from the thruster tunnel.  A new exchange tunnel thruster was prepared by the OEM representative on site for installation by Subsea Global Solutions.  Shortly after the old thruster was extracted a new tunnel thruster was installed.  Welding immediately commenced on the tunnel thruster strut plate in the thruster tunnel using the “A” class wet welding process.  In parallel, the diver / technicians properly torqued the tunnel thruster bolts into place.  Next, the diver / technicians installed the flex door system for the installation of the tunnel thruster blades.  With all of the blades properly installed, the tunnel thruster pressure test and completely installed, the thruster stay plate was fully welded, the rigging pad eyes and flex door rigging system was extracted and the tunnel thruster was prepared for final testing and operation.

From start to finish, Subsea Global Solutions was the trusted resource for the vessel.  Ensuring the cruise vessel remained in service and on schedule keep the passengers focused on their vacation as opposed to the ship!  We appreciate the trust instilled with us by our dedicated and loyal customer base.  We remain standing by to support you, our clients, anywhere any time!


SSA Flexible cofferdamLast month Subsea Global Solutions was contacted by a ship owner since one of their vessels exhibited issues with pitching her bow thruster propeller. As we considerable experience solving these types of problems, the client made the call for us to dive into action. A team of experts from Subsea Global Solutions together with the Original Equipment Manufacturer (OEM) examined the problem in the most convenient harbour for the customer.

In the port of Livorno Italy all parties came together and quickly started to diagnose the problem with the tunnel thruster controllable pitch propeller.  Subsea Global Solutions installed its flexible door system to create a dry, hyperbaric working environment. This platform allows a thorough inspection to be performed in a dry climate controlled environment and allows the team to execute a dry OEM approved repair.  While Subsea Global Solutions was performing the outboard preparatory steps to set the thruster dry on the inboard of the vessel the ship’s crew removed the oil and blanked the thruster piping in accordance with the Subsea Global Solutions’ repair procedure.  The inspection revealed that metal particles were present at the bottom of the gearbox. In order to identify the cause of this, the OD box, pitch indicator and linkage were dismantled. Shortly it became obvious a loose and damage shaft extension needed to be replaced.  With new parts on hand, a successful installation of a new shaft extension was performed by the Subsea Global Solutions crew.  The results were found within limits and the repair was completed to the satisfaction of the attending OEM technician.

Singapore 1Keeping the vessel on schedule, the thruster filled with oil again, the tunnel flooded with water and the flexible door system removed. Subsea Global Solutions team of experts remained on site until the very last test of pitching showed the required results; ensuring that the vessel would go back into service without any issues.

Subsea Global Solutions, yet again, supported all activities from initial planning to releasing the lines and watching the vessel depart. We look forward to supporting your needs in the future.


Improved services in Trinidad

 Miami Diver International N.V., Waterworld in Trinidad7A subsidiary of Subsea Global Solutions, is specialized in underwater ship maintenance and repair. We have been performing underwater services in Trinidad for years now. To compliment our crew and equipment already in Trinidad ready to attend vessels off shore 24/7, we are proud to announce that our workboat Waterworld has arrived in Trinidad this month and is available for our operations in Trinidad.

DSC094952The Waterworld is a diving support vessel and crew boat 25.5 meters in length. She is fitted with all necessary diving equipment and other specialized gear to support our operations in the region. She also has sufficient accomodations to allow our crew to stay comfortably overnight. This means Miami Diver can attend vessels and stay on site around the clock until the job is finished. No mobilization needed at the beginning and end of every day, loosing valuable dive time. This added mobility allows Miami Diver to work under higher standards and have faster response time to keep your valuable vessels and floating assets in operation. Miami Diver with the Waterworld in Trinidad can take care of all the simple and complex underwater maintenance or repairs. We look forward to the opportunity to work with you in the near future!  You may contact us at or call our office at +599 (9) 465 6633 to schedule support in Trinidad.

In-Water Repairs- THE ONLY SOLUTION!

DSC01798Specialty vessels require unique methods of repair to keep them in service and on location.  One such vessel is a specialized dynamically positioning offshore loading and offloading system for tankers.  Since this vessel is purpose built for a very specific operation offshore, repair facilities were unavailable at the vessels current location to support the repair of the critical azimuthing thrusters.  Considering the critical nature of this equipment, the Original Equipment Manufacturer (OEM) together with the vessel’s operators approached Subsea Global Solutions to develop an innovative method to overhaul the thrusters in image005a completely dry environment in accordance with the OEM’s requirements.  Utilizing a proven process of repair already applied to Semi-Submersible rigs around the world by Subsea Global Solutions a specialized collapsible Hyperbaric cofferdam was designed and built by Subsea Global Solutions.  With a full compliment of structural, weld and mechanical engineers on staff fully employed by Subsea Global Solutions, the specialized hyperbaric cofferdam was engineered and fabricated in the European office of Subsea Global Solutions.  In parallel to this engineering and fabrication project, the operations team worked together with the Original Equipment Manufacturer to develop an installation specific time line and repair procedure for the overhaul of the three dynamically positioning azimuthing thrusters.

DSC02012One-by-one, the expert diver / technicians of Subsea Global Solutions performed the entire 5 year maintenance of the azimuthing thrusters underwater in a dry hyperbaric environment.  This service included the replacement of the main shaft seal, all controllable pitch propeller blade palm seals, steering seal inspection and replacement as needed as well as critical inspection and maintenance to the propellers and other running gear.  All work was performed by OEM trained and certified diver / technicians who received unique thruster service training at the OEM’s training academy.  As the only OEM recommended global diving contractor, Subsea Global Solutions personnel enjoy the opportunity to receive OEM service engineer training and certification just like the OEM’s service personnel.  With this specialized training and skilled personnel, OEM authorized and warranted repairs were performed by Subsea Global Solutions together with the Original Equipment Manufacturer.

With thrusters freshly overhauled, the dynamically positioning offshore loading / unloading station left Europe for it’s next location in South America.  Next time Subsea Global Solutions sees the vessel will be at it’s permanent offshore location.  Subsea Global Solutions, your trusted resource for unrivaled service.

There’s always a first time for anything!- Stabilizer Fin extraction

image-4 Sometimes the impossible is made possible by just applying what you already know in a different form and fashion.  Subsea Global Solutions had the challenge to extract an entire stabilizer fin together with the Crux (Joint Connection) this past month on a cruise vessel that needed to maintain its schedule on a European Cruise.  Recognizing the critical nature of this repair, coupled with the challenging rigging to maneuver over 30 metric tons of fin and crux to the surface, Subsea Global Solutions developed a repair procedure and time line to execute this repair based on years of experience extracting ships equipment underwater.  By extracting the damaged stabilizer system with the vessel afloat, this allowed the Original Equipment Manufacturer to make the necessary critical repairs before the next schedule wet dock period in the fall later this year.

imageOnce the client contacted Subsea Global Solutions, a visit on board was performed by the engineering team to assess the in-board as well as out-board particulars of this specific stabilizer fin system.  Since the entire stabilizer fin and crux were planned to be removed for repair, it required specialized systems and a detailed process of repair to blank off the crux mating surfaces from the in-board side of the vessel so that rigging of the fin and crux could be performed just like in the dry dock; outboard of the vessel.  With critical vessel details now obtained from the on board visit experts from Subsea Global Solutions engineering department met with the Original Equipment Manufacturer to detail out a step by step, port-by-port time line and process of repair.  Once reviewed and approved, the team went to work.

Following the vessel from port to port, the diver / technicians of Subsea Global Solutions prepared the stabilizer system for extraction.  This included all inboard preparations under the supervision of the Original Equipment Manufacturer together with preparing the outboard side for heavy rigging.  By utilizing certified diver / welders certified to Subsea Global Solutions‘ “A” class wet welding procedures, load rated pad eyes were effectively welded to the ship’s hull to support the execution of the extraction.  With all inboard and outboard preparations completed, “extraction day” arrived.  With a little over 48 hours in port, the stabilizer fin and crux assembly was extracted and brought to the surface with out fail.  This incorporated specialized rigging techniques and buoyancy control to “float” the unit to the surface in a controlled and safe fashion.  Once extracted, the system was swiftly packaged and sent to the Original Equipment Manufacturer for overhaul so that it maybe installed later this year.

This was the first time a stabilizer fin and crux was ever removed on a vessel still afloat.  With expertise and engineering resources in house, a complete repair procedure and time line was developed.  With this information the vessel management made the decision to keep the vessel in service and continue to generate revenue.  By performing unrivaled service, we are our customer’s trusted partners.  We remain available to support your needs at any time.  Big or small, your problem is our solution!


Africa-Here we come!

Subsea Global Solutions (SGS) has developed specialized methods of repair for ships that have been applied to vessels on a global basis.   These specialized types of repairs are not typically performed by diving contractors around the world and require innovative-engineered solutions with skilled and certified management and dive personnel.  While SGS maintains 7 offices throughout the world, with an 8th office to be announced shortly and over 100 fully employed diver / technicians, SGS is the market leader in specialized underwater ship repair.  Maintaining certification with all major classification societies at all of it’s facilities in AWS D3.6 “A” class wet welding techniques, maintaining a full time engineering staff including structural, weld and other engineering resources, SGS is able to maintain and continually pioneer specialized hyperbaric “dry” and “wet” repair procedures and equipment to support advanced underwater equipment repairs.  Through this spirit of invention, SGS maintains long-term agreements with major ship equipment suppliers and ship owners in various market segments.

Due to an increase in market demand for these types of advanced underwater repair solutions, SGS continues to expand it’s global foot print by qualifying strategic vetted partners who maintain the same focus on delivering unrivaled service, maintain personnel and equipment to the highest standard and are looking to form a strategic global partnership to work together on supporting “day to day” diving activities but also support advanced underwater vessel and equipment repair.

Subsea Global Solutions is pleased to announce it’s latest Vetted Partner, Subtech Group of Africa.  With eight (8) fully manned facilities along all coasts of Africa (West, East and South), Subtech Group is strategically located on the African continent with equipment and personnel to support the demands of ever growing customer base of Subsea Global Solutions.  Combining the local personnel and equipment with the expertise of Subsea Global Solutions’ skilled work force and specialized equipment will provide clientele with installations transiting the African continent with cost effective advanced underwater repair solutions not currently available throughout the African continent.

This unique partnership between the internationally renowned underwater ship repair company, Subsea Global Solutions with the Sub-Saharan African marine and sub-sea services leader, Subtech group provides unrivaled service to marine, offshore and other vessel operators throughout Africa.  Let us know what we can do for you.  We remain standing by to understand your requirements to service your marine installations on the African continent.

One ship, two complex repairs and one really happy client

In April 2013 a container vessel experienced water ingress into the stern tub and oil lost from its Controllable Pitch Propeller (CPP) blades seals. The client arranged an in water inspection and discussed the results with the experts of Subsea Global Solutions. Based on the findings, it was determined that the  CPP Propeller blade Palm seals and the Stern tube aft seal required replacement. Working together with the client the operations team of Subsea Global Solutions scheduled a class and OEM approved repair as soon as the vessel received all spare parts on board.

Working around the clock the stern tube aft seal was exchanged in a little over 48 hours.  Utilizing Subsea Global Solutions’  Transhab, an inflatable hyperbaric cofferdam, Subsea Sea Global Solutions’ factory trained and OEM certified diver / seal technicians completed the renewal of the aft seal in a completely climate controlled dry environment.  With this phase of the repair completed, the DSCN5865crew size was reduced to finish the replacement of the CPP Propeller blade Palm seals. The ship ballasted the stern out of the water so the prop was half out and the team changed the seals at the 12 o’clock position. Working together with the Original Equipment Manufacturer, the pitch oil system was isolated and prepared for the performance of an in water repair. With the system properly arranged the first propeller blade was released from the propeller hub. Once the blade was away, the team changed the seal, the seal ring and re-installed the propeller in accordance with the approved OEM and class approved procedure. The propeller blade bolts were then torqued to the proper settings and the same procedure was followed for the other blades.

Not long after the job was completed, the operations team at Subsea Global Solutions received an e-mail from the Technical Director of our client who witnessed the operations on site.   He stated “I enjoyed watching your team’s professional attitude, knowledge and kind of persuasive cool approach, i.e. “don’t worry & relax, we have seen it all and we are in control”, though still minding and respecting our specific needs at site.” To say the least, it is gratifying to read that we have DSCN5830delivered our services in line with our mission and vision by being your most valued and trusted resource through unrivaled service.

No job is too large and no job is too small for Subsea Global Solutions.  We value our relationships with our clients and aim to deliver.  This job exemplifies our depth and capabilities to deliver on time and approved results.  Subsea Global Solutions is the contractor on “speed Dial” on this clients phone.  Let’s demonstrate our capabilities to you!

Shaft Seal Replacement- Any time and Any Where

DSC02693While cruising the Mediterranean Sea a cruise vessel encountered excessive water leakage on one of its propulsion shaft seals.  Considering the severity of the situation, the client contacted Subsea Global Solutions to dive into action.  Maintaining specialized equipment in various locations throughout the world and maintaining fully certified diver / seal technicians on staff, a full compliment of qualified personnel and equipment was efficiently dispatched to the vessel.

Subsea Global Solutions’ operations team worked together with the vessel’s superintendent and operations staff to develop a time line for this repair to ensure the vessel would remain in service and NOT be delayed in any port of call.  This required Subsea Global Solutions to stage the gear prior to the vessels arrival.  Upon its arrival into a port in Italy, Subsea Global Solutions performed all of the preparatory work necessary to support the shaft seal renewal.  This preparatory work included the removal of the rope guard using a carbon arc gouging system.  By using this advanced technology to remove the rope guard, minimal prep work is required to reinstall the same rope guard since the cut line is clean and straight.  With the preparatory work being performed in advance of the actual repair, this minimized the required time needed to renew all of the affected propeller shaft seals.

DSC01708Upon the vessel’s arrival in Malta, Subsea Global Solutions’ team of expert diver / technicians dove into action.  The specialized flexible hyperbaric cofferdam, Transhab, was installed over the affected propeller shaft seal.  With the space properly de-watered and sheltered from the sea, a factory authorized and class approved renewal of the shaft seals took place.  All oil and water lip rings were removed, the seal housings were cleaned, liner was inspected and new oil and water lip rings were “vulcanized” using OEM approved jigs, glues and procedures.  With all the lip rings renewed the oil system was air tested, pressure tested and properly filled.  The water lip rings were assembled around the propeller shaft, air tested and pressure tested.  Subsea Global Solutions completed the job in Malta in less than 48 hours by re-installing the rope guard utilizing the groups class “A” wet welding procedures.  Diver / Welders coded to Subsea Global Solution’s class approved class “A” wet welding procedures performed the welding on this critical component.  By using coded underwater diver / welders to perform this weld repair ensures that at the conclusion of the repair there will be no notation from class on the rope guard weld repair performed.  The vessel departed Malta on time with a happy crew and happy passengers!

Subsea Global Solutions delivers unrivaled service to keep your vessels in service.  We remain the trusted service provider to the cruise industry in all ports of call around the world.  We always remain available 24 hours a day and 7 days a week to support your needs.