Service
Diving Services
Certified by the world’s leading classification societies, our experienced divers provide safe and efficient operations in full compliance with regulatory requirements.
Scope of work
- Underwater hull inspections
- Hull cleaning and propeller polishing
- Underwater repairs and maintenance
ROV-based inspections
Features
- Diving operations conducted by professionals skilled in all types of ship hull structures
- All operations are pre-approved by the Japan Coast Guard and local port authorities to ensure safety and compliance
- Some team members also hold Civil Engineering Construction Manager and Port Facility Diver certifications
Service Overview
Service
01
Underwater Hull Inspection
Japan Marine Science provide various in-water surveys required by classification societies, as well as pre-docking assessments of hull conditions (including fouling). Our services also cover evaluations of hull coating conditions, such as film thickness measurement and paint sampling for analysis.
Our expert techniques quickly and accurately detect damage and abnormalities on hull plating, sea chests, bilge keels, rudders, propellers, and other fittings.
Service
02
Underwater Hull Cleaning
Japan Marine Science provide fast and efficient underwater hull cleaning services using our proprietary cleaning technology.
Hull fouling caused by marine growth increases drag, reduces vessel speed, and raises fuel consumption, potentially leading to engine overload. Regular cleaning is essential to maintain performance and prevent operational risks.
Through extensive research on the growth and adhesion mechanisms of marine organisms, as well as the properties of silicone and antifouling coatings, Japan Marine Science has developed a large hull cleaning machine equipped with marine growth collection devices, compact hand-held units, and specialized cleaning brushes. Our expert divers and innovative tools deliver precise, efficient hull cleaning.
Service
03
Propeller Polishing
Japan Marine Science provide propeller polishing services that enhance energy efficiency. Performing this work underwater eliminates the need for dockside scaffolding and delivers significant cost savings.
Our propeller polishing achieves A or B grade—the highest standards—on the UK Rubert Scale. Combined with hull cleaning, this service delivers exceptional energy-saving benefits.
Service
04
Hull Damage Repairs & Others
Japan Marine Science provide underwater repair services for hull bottoms and fittings, fixing damage such as cracks in plating, bilge keel fractures, and missing or bent propeller blades.
We also provide services such as blanking overboard pipes during sea valve replacement, removing fishing nets or ropes entangled in thrusters, propellers, stern tubes, or rope guards, installing sacrificial anodes, and replacing sensors such as Doppler logs.
Feel free to contact us for various diving inspections and operations related to marine civil engineering projects.
Service
05
ROV (Remotely Operated Vehicle)
In recent years, ROVs have increasingly replaced divers for certain tasks.
Diver operations face many limitations—such as water pressure, working time, and temperature—and in Japan, they can only be performed during daylight hours. ROVs are not subject to these restrictions and, while limited to simpler inspections, they can operate safely for extended periods as long as power is supplied.
Japan Marine Science can also accommodate remote requests, allowing you to view the vessel’s hull condition and underwater environment from your office—just like a diver’s CCTV inspection.