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Educational Support

Underwater survey business

We made the most of the ROV
underwater survey

We solve various work problems in underwater civil engineering (marine, port, river, lake, etc.).


Issues in visual observation of underwater infrastructure by divers

・Inefficiency and difficulty in turbid water, high-velocity water areas, and water depths of 40 m or more

・Evaluation by estimating the entire structure from observation results of points or lines

・Evaluation of underwater infrastructure is determined by individual divers. Varies depending on skill and experience.

・The results are mainly 2D drawings and photo collections, and it is difficult to support IOT and ICT.

ROV Solves Visual Observation Challenges

With ROVs, underwater surveys and observations become familiar.The survey of underwater structures such as rivers, fish reefs, bridge piers, dams, and harbor facilities can be conducted more frequently and at lower cost, and it is expected to be used in a wide range of areas such as rescue, search, and assistance in times of disaster.

It is also possible to combine observation equipment such as ROV and sonar to visualize and convert underwater topography and structures into data.

Advanced optional equipment

  • U-QPS

  • imaging sonar

  • laser scaler, etc.

Characteristics of the ROV business


low cost

It is possible to provide it at a low cost because the survey is conducted at our own facilities.


high safety

It ensures a high level of safety because it does not require human diving work.


solid research

Since the survey video can be shared in real time, reliable surveys are possible.

Main usage scene


Structure/ship bottom survey

Investigation of structures installed on the seabed such as sinkers, sinker chains, structure foundations, caisson installation status, search for lost items, etc.


Investigation of closed spaces (pipes, water tanks, etc.)

Investigate the state of deterioration of walls and pipes in closed spaces. It is possible to navigate while acquiring the position inside the structure using the omnidirectional sonar.


Dam/offshore wind power survey

Investigation of dam ancillary facilities (embankment body, screen, water intake device), investigation of offshore wind farm foundations, power cable burial status, etc.

Deputy features ROV
made the most of
Promoting Underwater Surveys for “Urban Agricultural Civil Engineering”

We provide cost reduction by realizing high operation and longevity of agricultural and civil engineering equipment through regular inspection and maintenance.


low cost


high safety


solid research

Main achievements


Fixed net survey

Depth 40~80m


Fish tank sinker survey

Searching for a sinker whose sinker chain has come off


Fixed boom survey

Investigation of the status of oil fences installed in the sea


Chemical plant pure water tank
internal investigation


Offshore wind farm cable survey

Investigation of buried power cables

Chemical plant pure water tank inner surface investigation


Vessel shell survey

Investigation of large work boats (side thrusters and bilge keel)


Ship survey, seafloor survey

Deterioration investigation of moored commemorative ships


Port Seabed Block Survey

Installation status survey of wave-dissipating blocks installed on the seabed of harbors


pipeline survey

Box culvert pipeline survey (500m)


Dam body investigation

Investigation of location information of damaged areas


Tanker shell survey

Follow-up observation of repaired areas


Tokyo Bay Seabed Salvage Survey

Search for damaged parts of offshore structures


Ironworks cooling tank bottom survey

Measurement survey of cooling tank walls


Port jetty caisson survey

Port caisson section installation status measurement survey


Seafloor biological survey

Seabed ecosystem and water quality survey


Click here for inquiries and consultations

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