Our Services
Unidive delivers fast, reliable underwater maintenance and repair services that keep your ships performing at their best. From hull cleaning to propeller repairs, our certified divers provide efficient, cost-saving solutions—anytime, anywhere.
Underwater Hull Cleaning
Underwater Hull Cleaning: Maximize Performance and Efficiency
At Unidive, we provide professional underwater hull cleaning services to keep your vessel operating at peak efficiency. Our skilled team removes marine growth, algae, and biofouling without the need for dry docking, improving fuel efficiency, reducing drag, and protecting your hull from long-term damage. Using safe, environmentally responsible methods, we ensure your vessel stays in top condition while minimizing downtime. Ideal for commercial shipping, fishing, and offshore operations, our underwater hull cleaning helps extend the life of your vessel and optimize performance.
Propeller Polishing
Propeller polishing
Propeller polishing unit it’s a hydraulic gear pump 20lpm / 70-140 bar. It’s a rotation device. A diver providing multi-stage micro-polishing of all propellers blades including boss and cone, using increasingly finer grit diamond and silicate discs. With this method we can achieve surface conditions that were never seen before. This can only be done underwater. Large fuel savings with propeller surface treatment. The cost of such an operation is very attractive and is very easily gained back in a matter of days.
Regular maintenance is easy to schedule and results on propeller surfaces. Continuous and large fuel savings are now possible.
Underwater Surveys
Underwater Survey Services
Unidive offers comprehensive underwater survey services designed to give vessel owners and operators a clear understanding of their ship’s condition below the waterline. Our certified divers use advanced inspection and recording equipment to carry out detailed hull, propeller, and structural surveys, including NDT testing, corrosion assessments, and damage investigations. Each survey is followed by an accurate, easy-to-understand report that helps clients make informed maintenance decisions, prevent costly repairs, and ensure compliance with class and insurance requirements. Whether for routine checks or emergency assessments, Unidive provides precise, dependable underwater survey solutions.
Underwater Maintenance and Repairs for Vessels
Underwater Maintenance and Repairs for Vessels
Unidive provides a full range of underwater maintenance and repair services to ensure vessels operate at peak performance without the need for drydocking. Our skilled and certified divers specialize in hull cleaning, propeller polishing, anode installation, wet welding, and thruster repairs—all performed safely while the ship remains afloat. Using advanced hydraulic and water jet systems, we deliver fast, efficient, and cost-effective solutions that reduce fuel consumption, prevent corrosion, and extend vessel lifespan. With Unidive’s expertise and 24/7 availability, shipowners can rely on minimal downtime and maximum operational efficiency.
Wet Cutting and Welding
Wet Welding Services
Underwater welding services are used for temporary or permanent repairs of any crack found in the hull of a vessel or rudder blade of a ship or any construction project. It can also be used for cathodic protection or other shell plating repairs. Wet welding is faster and more cost-efficient than dry underwater welding. Unidive is certified and experienced in wet welding.
Damage Evaluation
Damage Evaluation
Unidive offers precise underwater damage evaluation services to help vessel owners quickly assess and address any structural or mechanical issues below the waterline. Our experienced divers perform detailed inspections using advanced video and communication systems to identify cracks, dents, or deformations on hulls, propellers, and other critical components. Each evaluation is supported by comprehensive visual documentation and professional reports, allowing clients to make informed repair decisions and meet class or insurance requirements. With Unidive’s expertise, damage is detected early—reducing repair costs, preventing further deterioration, and keeping your vessel safely in operation.
Anodes replacement
Anode installation
We can install both ICCP and sacrificial anodes. If needed we can supply the anodes, saving the owner the trouble of having to arrange the delivery himself.
Bow and Stern Thrusters repair and maintenance
Bow and Stern Thruster Repair and Maintenance
Unidive specializes in the repair and maintenance of bow and stern thrusters while vessels remain afloat, eliminating the need for costly and time-consuming drydock visits. Our certified commercial divers are trained to remove, service, and reinstall all types of tunnel thrusters safely and efficiently. Using advanced underwater tools and precise inspection techniques, we ensure that each unit operates smoothly and reliably after maintenance. Whether performing routine servicing, emergency repairs, or full unit replacements, Unidive delivers fast, high-quality results that minimize downtime and keep vessels fully operational.
Water proofing Services
Waterproofing Services
Unidive provides reliable underwater waterproofing solutions to protect vessels and marine structures from leaks, corrosion, and water ingress. Our experienced divers use advanced materials and proven sealing techniques to perform effective underwater repairs on hulls, sea chests, pipes, and other submerged components—all without disrupting vessel operations. Whether for emergency leak sealing or preventive maintenance, Unidive ensures durable, long-lasting results that enhance safety, extend equipment life, and reduce costly downtime.
Marine/Harbor inspection and construction
Marine and Harbor Inspection & Construction
Unidive offers comprehensive marine and harbor inspection and construction services, supporting both inland and offshore projects with safety and precision. Our certified divers perform detailed structural assessments, seabed and slope surveys, and corrosion inspections to ensure the integrity and longevity of marine infrastructure. In addition, we provide expert underwater construction solutions, including pile repair and splicing, cathodic protection system maintenance, underwater concreting, and debris removal. With advanced surface-supplied diving systems and a commitment to quality, Unidive delivers dependable, cost-effective results that keep marine facilities safe, stable, and fully operational.
Speed log & Echo sounder sensor replacement
Precision Sensor Replacement for Speed Log & Echo Sounder Systems
We specialize in the professional replacement of Speed Log and Echo Sounder sensors, ensuring accurate navigation and depth measurement for your vessel. Our experienced technicians use only high-quality, certified components to restore your systems to peak performance, minimizing downtime and maximizing safety at sea. Whether upgrading outdated equipment or addressing sensor malfunctions, we provide reliable, efficient service tailored to commercial shipping, fishing, and offshore operations. Trust us to keep your vessel’s critical navigation and sonar systems operating with precision and confidence.
In Water Surveys in lew of dry docking
In-Water Surveys: Reliable Inspections Without Dry Docking
We offer professional in-water surveys as an efficient alternative to traditional dry docking. Our expert team conducts thorough inspections of hulls, propellers, and underwater equipment using advanced techniques, identifying maintenance needs and potential issues early. This approach saves time and reduces operational costs while ensuring your vessel remains compliant, safe, and seaworthy. Whether for routine checks or pre-purchase assessments, our in-water surveys provide the accuracy and peace of mind you need without the downtime of dry docking.
FAQ
Do you provide emergency or 24/7 services?
Yes. Our expert team is available 24/7 to handle emergency repairs, inspections, or any underwater maintenance needs, ensuring your vessel stays safe and operational at all times.
Are your divers certified and experienced?
Yes. All our divers are fully certified commercial diving professionals with extensive experience in underwater inspections, maintenance, and repair for ships, yachts, boats, and offshore structures. Safety, expertise, and precision are our top priorities.
We have a deep understanding of the shipping business, and apprehend how vital it is to keep to your schedule.
What is your service area?
Our services cover vessels operating in Greece, including the Port of Piraeus, as well as other ports, harbors, and offshore locations. We are fully equipped to provide underwater inspections, maintenance, and repairs wherever your vessel is located.
Is your company managed in accordance with ISO standards?
Yes, Unidive follows ISO Standards.
Do you offer Custom Solutions?
Yes,From the very beginning Unidive goal has been very simple: to keep ships in business. We achieve this goal by offering our customers afloat solutions to any problem may arises with the underwater part of their vessel. Unscheduled and costly drydock visits are prevented in this manner. It is very important that we keep to the highest quality and safety standards during any operation.