- info@nagoyaunderwater.com
Get In Touch
Get In Touch
Anyone can say they dive. Commercial diving is something else: a trained team, a written plan, tested equipment and a safety system that works when something goes wrong. Commercial diving services in Nagoya Port are built on this foundation, and it is what an owner or a surveyor should expect from a contractor.
Commercial diving is diving for work, as opposed to leisure. It uses surface-supplied equipment, in which air is delivered to the Diver through an umbilical from the surface. The umbilical also carries communication and a safety line. The supervisor at the surface can talk to the Diver at all times, see him on CCTV and control his gas supply.
A basic team has a supervisor, working divers, a standby Diver and a tender. The supervisor is responsible for the dive and can stop it. Each Diver is trained and certified for the work. Technical specialists, such as welders and CCTV operators, join the team when needed. Roles are clear, and everyone knows what to do if there is a problem.
Before each dive, the team prepares a plan that lists the task, the location, the depth, the hazards and the controls. Typical hazards include ship movement, thruster or propeller operation, water intake, tide and current, traffic and overhead work. Control measures include lock-out of machinery, communication with the bridge and the engine room, and a dive flag. The plan is reviewed with the master and signed off.
Equipment is checked before every dive: masks, umbilicals, compressors, air banks, communications and CCTV. Air quality is tested, and records are kept. Compressors have backup supply, and a reserve gas supply is held at the surface. Faulty equipment is withdrawn from use.
Industry guidance, such as that issued by IMCA, the International Marine Contractors Association, sets good practice for diving operations, and we work to such guidance. We also follow the applicable regulations and the requirements of the ship, the terminal and class. For air diving, industry guidance places the maximum depth at 50 metres, though most ship work is far shallower.
Divers are medically examined and certified fit for work. Every dive plan includes the nearest medical facility and arrangements for emergencies. Oxygen and first aid equipment are always on site. If someone is unwell, the dive stops.
A contractor with these systems is safer, more reliable and more likely to be accepted by class and insurers. Our team keeps full records of each dive and provides copies to the owner on request.
Q1. What is surface-supplied diving?
Diving in which air is delivered to the Diver through an umbilical from the surface, which also carries communication and a safety line.
Q2. Who is responsible for the dive?
The dive supervisor, who controls the dive from the surface and has the authority to stop it at any time.
Q3. What is the maximum depth for surface-supplied air diving?
Industry guidance sets it at 50 metres. Most ship work in port is far shallower.
Q4. What is checked before every dive?
Masks, umbilicals, compressors, air banks, communication systems and CCTV, plus air quality, with records kept.
