Wärtsilä Underwater Services (formerly Trident) started its journey in September 1993 as an underwater service provider with a team of two divers, specialising in repairing, overhauling, and servicing seagoing vessels, marine installations, and rigs for the commercial, energy, and navy markets.
Since then, it has established a far-reaching partner network of factory-trained, industry-certified diver technicians operating on a global scale, as well as a number of offices across Europe.
That, combined with its industry-specific product training programmes and access to Original Equipment Manufacturer (OEM) products and solutions, position it to offer technical maritime support and solutions when customers need it most while guaranteeing a high standard of service and commercial diving equipment.
Its innovative approach, outside-the-box thinking, and ability to handle warranty claims have proven invaluable to customers, which is why Wärtsilä Underwater Services is considered the OEM’s underwater service provider of choice.
Our underwater solutions eliminate the need for dry docking, saving time and money
Our underwater maintenance and repair services are divided into the following areas of expertise.
Machinery and equipment
We have underwater factory-approved repair options available, executed by trained and certified technicians. Product improvement and procedure development together with major Original Equipment Manufacturers (OEMs) allow us to provide a safe, reliable, and cost-effective underwater service.
Our offerings include:
Our in-house and external OEM training/certification programmes give underwater technicians a firm understanding of hydrodynamics, allowing them to evaluate and execute complex underwater propeller repairs. We advise owners and classification societies on the best propulsion and cost-effective repair solutions on-site, based on our initial underwater examination.
Our extensive experience acquired over the decades allows us to engineer and build innovative tools and equipment for underwater propeller repair solutions beyond existing methods. This means more economic, time-saving, and technically advanced propeller modifications and repair solutions for our customers.
Our propeller repair/modification services include:
Shaft sealing systems
We are your partner for commercial diving services on all floating structures.
We have a specialism in underwater ship maintenance, cleaning, and inspection, and our global fleet maintenance agreements are supported by all Wӓrtsilӓ Underwater Services locations and our approved vendors worldwide.
Work methods and procedures are shared globally with our partners to meet or exceed our client's expectations.
Our underwater maintenance services include:
Shell plate repair
We’ve been delivering underwater wet/dry and hyperbaric welding solutions as a part of our portfolio since start-up in 1993.
Wet welding procedures were developed/approved for class A fillet welds. In combination with strategic alliance partners in 2014, an underwater wet welding V-Groove procedure was successfully implemented and accepted by DNV-GL. The diving training facility in the head office in Terneuzen, The Netherlands is constantly in use, training new staff on underwater welding applications.
Wet welding is a standard technology used on most of our projects on a daily basis. Permanent shell-plate repairs are executed using cofferdams designed/engineered in-house.
Our underwater Welding Services include:
In 2005, we received the EMERGO Maritime Innovation Award in recognition of our OEM-approved underwater service for installing and servicing lip-type shaft seals. Since then, we’ve performed hundreds of seal repairs and overhauls on shafts with a diameter of up to 1100mm.
Its success is largely owing to our technical training, our experience in product design, and the emphasis we place on product testing, all of which have enabled us to deliver an exemplary service to the maritime industry, one which uses a widely recognized and accepted shaft seal overhaul method aligned with classification and manufacturer warranty standards.
In order to carry out the service safely and efficiently, we set up a lightweight, flexible, open habitat (FLEX-DAM) around the stern configuration, away from the natural elements and the dust generated in drydock. Its compact design is also more conducive to commercial air freight, allowing for swift mobilization in emergency situations.
Our underwater shaft seal repair services include:
Oil and gas
We’re getting more involved in projects on offshore floating structures as a result of our technical capability to support our oil and gas customers with the best cost-effective, time-saving solutions in all circumstances.
Over time, we’ve developed a strong reputation for being a globally present, reliable, fast-response partner when it comes to (emergency) underwater repairs.
Our underwater offshore services include:
Trident Group created an internal innovative braintrust as a means to transform ideas into reality.
Over the past decennia, it resulted in new industry standards for servicing (propulsion) equipment below the waterline. An example is the award-winning “FLEX-DAM” hyperbaric habitat for shaft seal replacement on main propulsion shaft lines.
We build the “TRITON V” underwater hull-coating treatment system in 1993 and that became the approved standard supported by coating manufacturers.
The “TRITON VI” is the reclaim version with a filter system that allows for hull treatment in ports that banned cleaning. The “TRITON VII” is specifically designed for effective removal of very heavy marine growth as typically found on offshore structures, storage tankers, drill rigs, etc,..
We have designed specialty tools for effectively machining steel and propeller materials in a safe and up to 8 times more productive manner compared to traditional methods.
The “Innovative Braintrust” supports and creates solutions meeting our clients needs wherever, whenever
Engineering, research & development include:
- Cofferdam design to support permanent weld repairs afloat
- Underwater cleaning equipment
- Specific purpose maritime technical solutions
- Custom innovative tool design
- OEM support with product development
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Contact our 24/7 customer support at
+31 115 61 2872 for assistance. You can also contact us by email at firstname.lastname@example.org
Find your local Wärtsilä office here