Author Archives: Subsea Global Solutions

What No Cofferdam?- Class approved Underwater Wet Welded Groove Welds

DIGITAL IMAGESubsea Global Solutions is proud to announce that it has recently qualified more underwater wet welding procedures.  Subsea Global Solutions has qualified procedures for groove welds, meeting the Class A requirements of the American Welding Societies specification AWS D3.6M:3010 – Underwater Welding Code. The welding of the test plates was witnessed by Lloyd’s Register, who also issued the certificates approving the procedures. At the same time Subsea Global Solutions qualified 8 welder divers to the groove welding procedures.  Subsea Global Solutions continues to lead the way in the industry by qualifying it’s personnel and processes to these stringent wet welding requirements.  These additional procedures are added to our already existing Class approved Class “A” fillet wet welding procedures.

OLYMPUS DIGITAL CAMERAClass A wet welds meet the visual acceptance criteria, Non-Destructive Evaluation (NDE), and are comparable in regards to the mechanical properties as to welding performed top side under dry conditions.  This is the highest quality wet welding available today in the industry.


OLYMPUS DIGITAL CAMERASeveral test plates were welded in Subsea Global Solution’s training center located in Miami, Florida, USA by welder divers from all Subsea Global Solution’s member companies Parker Diving Service, Miami Diver LLC and Trident BV.



DSCN1321 - CopyAdding these class approved procedures to our service portfolio allows us to remain the trusted resource to deliver unrivaled service.  With these approvals in hand Subsea Global Solutions can perform more complex and challenging underwater wet weld repairs with class supervision.  Send us your inquiry and we can prepare a repair procedure for class consideration.  We remain available to evaluate the options available for your vessels.  Please feel free to contact us with questions on how this could apply to you.

Tunnel Thrusters out; Tunnel Thrusters in…. All in a days work

DSC03199Over the past month Subsea Global Solutions has been the company of choice for several vessel operators to perform tunnel thruster exchanges and repairs on their vessels around the world.   Two (2) in-place tunnel thruster repairs were performed in central Europe and two (2) tunnel thruster exchanges were also performed in Europe.  In addition to these four (4) tunnel thruster repairs in Europe, two (2) tunnel thruster exchanges were performed on cruise vessels remaining in service in the Caribbean.  Utilizing a proven process that consistently delivers top quality and on-time completion performance Subsea Global Solutions remains on the fore-front of the performance of these types of repairs.

SSA Flexible cofferdamDuring the execution of the repair services on these Tunnel Thrusters, Subsea Global Solutions’ team of Diver / Technicians utilized our flexible door system to create a dry hyperbaric environment in the tunnel thruster tunnel in order to execute Class and Original Equipment Manufacturer approved repairs.  This safe and efficient process allows our Diver / Technicians to perform the work in a clean and controlled environment completely underwater without trimming of the vessel.  In fact, all work was performed while cargo operations was taking place; thus avoiding any off-hire or schedule delays for the vessels.  Being the diving contractor for the Original Equipment Manufacturer in these cases, the work was completed with a fully backed OEM warranty.  As the trusted resource for underwater services, Subsea Global Solutions delivered a fully warranted repair on time without issues or delays.

DCIM100GOPRODuring the execution of the tunnel thruster exchanges, Subsea Global Solutions’ teams of experts utilized one of two methods during the tunnel thruster exchange; a dry hyperbaric method or a wet method of tunnel thruster exchange.  The dry hyperbaric method included the use of Subsea Global Solutions’ flexible dry doors in order to create a dry hyperbaric environment to demount the tunnel thruster lower gear box.  The wet method of tunnel thruster exchange included the use of DCIM100GOPROan OEM patented tool that was created together with Subsea Global Solutions as part of our OEM partnership.  Both methods of tunnel thruster exchange were performed over multiple port stays in order to ensure the work could be completed without delays or taking the vessel out of service.

From planning to execution and finally to reporting, Subsea Global Solutions demonstrated its commitment to quality and service.   We will deliver unrivaled service.  We remain available to support your needs at any time, anywhere around the world.  Please feel free to contact us if you require our support.



Our German agent: Germania Shipyard Agency

Germania Shipyard Agency is located in the beautiful city of Hamburg in northern Germany. This agency has been working with Subsea Global Solutions since 2008 and represents us in Germany. After 5 years of cooperation Germania Shipyard Agency is happy to say that Subsea Global Solutions fully meets their expectations. At the moment Germania Shipyard Agency represent over 25 of the leading ship repair and new building Shipyards as well as several experienced afloat workshops all around the World. So you can really say that their main business is in Ship repair.

SONY DSCSONY DSCSONY DSCSONY DSCThe team includes two experienced sales representatives, one secretary and one person for the accounting. To expand the services and to obtain their quality they employed already another person for field works who will start soon.

In the German market the shipping community is mainly represented by medium sized family owned companies, besides the two famous liner companies Hapag Lloyd and Hamburg Süd. The German owners impressively operate the largest container fleet in the world, reflecting approximately 70% of all containerships. In the time frame 2000-2008 this fleet showed an expansion in large-size container vessels. This development gave the owners more and more problems in finding suitable repair locations to service these new large vessels. This pushed Germania Shipyard Agency to look for new ways in ship repair. Hence, in 2008 they took the chance to represent Subsea Solution Alliance, which is nowadays Subsea Global Solutions. This new cooperation was quite important for them as they saw a big potential in under water services. Subsea Global Solutions turned out to be a strong and competitive partner, with experienced staff and makers’ approvals. Under water services turned out to be a great alternative for dry docking especially by saving time and cost.

Throughout the year Germania Shipyard Agency organizes several events for greater customer relationship including their famous Alster-Lake-tour and a nice golf tournament. For sure the most important event is the SMM, the biggest shipping show in the world with 60,000 visitors. SMM SONY DSCtakes place every two years in Hamburg, the home town of Germania Shipyard Agency. Since several years they have been able to build the biggest booth on the show with 300 m2. There the participants have the opportunity to meet customers not only from Germany but from all over the world. Germania Shipyard Agency together with Subsea Global Solutions are already looking forward to welcome you in 2014 not only as business partners but also as friends.

When others can’t- We can!- Underwater Shaft seal replacement

DSC02693More and more debris is being found in our oceans throughout the world.  This debris includes large masses of fishing line and net.  While transiting the southwestern USA, a cargo vessel began experience excessive sea water ingress on the aft shaft seal.  Thinking it was a simple matter of just cutting away some fishing line, the ship manager contracted the work with a local dive company to inspect the stern tube and remove the fishing line.  In the process of fish line removal it was confirmed that some of the mono-filament fishing line was sucked into the lip seal arrangement.  Through the extraction process further damage to the seal arrangement occurred.  With the job exceeding the capabilities of the dive contractor on site, Subsea Global Solutions was called in to perform a permanent repair to the at shaft seal.  Within 16 hours of being initially notified by the ship manager that our services were required, Subsea Global Solutions mobilized all of the necessary equipment and personnel to perform this aft shaft seal repair in less than 48 hours.

DSC01708With the rope guard already removed, Subsea Global Solutions installed the Transhab flexible hyperbaric cofferdam over the affected area of the vessel.  With the critical area of the stern tube dry and in a climate controlled environment, Diver / Technicians entered the Transhab and fully assessed the aft shaft seal system.  With Original Equipment Manufacturer factory training and certification from the manufacturer of the seal system, the Diver / Technicians began a class approved and OEM warranted repair.  All lip rings were properly disassembled.  The seal housings were evaluated, overhauled and prepared for re-installation.  The shaft seal liner was inspected, grooving measured and evaluated.  It was determined that the existing liner was within factory specifications so replacement or removal of the spacer plate and or liner was not required.  If required, the seal shaft seal spacer plate or shaft liner could have been removed and or replaced in a completely dry environment in the TransHab flexible hyperbaric cofferdam utilized by Subsea Global Solutions.

With all critical components measured and cleaned, the Diver / Technicians performed the new lip ring bonding process.  Utilizing the same process, same jigs, and glues utilized by factory approved technicians performing the work in the dry dock, the Diver / Technicians completed the most critical part of the shaft seal replacement.  Once the seal assembly was completely assembled, the Diver / Technicians performed factory required feeler gauge tests and pressure tests.  All pressure tests and mechanical inspections were performed to the full satisfaction of the attending ship manager and class surveyor.

In less than 43 hours, Subsea Global Solutions came and went.  We are your trusted resource to deliver unrivaled service.  The Ship Manager was excited to see the stern lights go over the horizon without any notations or open class items.  Subsea Global Solutions is your trusted resource to keep your vessels in service.  One world, One Ocean; Subsea Global Solutions is your underwater contractor any where around the world.

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.