La Underwater inspection with ROV and underwater robotics It has become a key component for any activity that depends on the sea: from the shipbuilding industry to the energy sector, including scientific research and insurance. What previously required specialized diving equipment, extensive planning, and costly shutdowns can now be done remotely, quickly, and with a much higher level of safety.
In recent years, remotely operated vehicles and underwater drones They have made a huge leap in capabilities: high-definition cameras, advanced sonar, intelligent piloting assistance software and countless tools that allow them to do everything from simple visual inspections to maintenance, cleaning, cutting or recovery of structures at great depths.
What is an inspection ROV and how does it work?
An ROV, acronym for Remotely Operated VehicleIt is basically an unmanned underwater robot controlled from the surface. This equipment connects to a control unit via an umbilical cable, which integrates power, data transmission, and, in many cases, real-time video.
El ROV umbilical cable It's its technological umbilical cord: it's through this that it receives power, sends images from its cameras, data from its sensors, and the commands that the pilot executes from the control center. This allows the robot to be operated at a great distance from the operator, maintaining stable and secure communication even in challenging environments.
The surface control center is usually made up of a control console with joysticks, video monitors and software specifically designed to view telemetry, record video, adjust navigation parameters, and manage the data collected during the inspection mission.
These types of systems have gone from being tools almost exclusively used by large oil companies to becoming affordable solutions for shipping companies, engineering firms, insurers and research centerswho can now have their own equipment or hire specialized services as needed.
Thanks to these advances, ROVs are now indispensable for assess submerged structures, document damage, support divers, and carry out work in areas where human access would be dangerous or simply impossible.
Ship hull inspection: from divers to underwater drones
La inspection of a ship's hull It is one of the most critical tasks in naval maintenance. A detailed evaluation of submerged areas allows for the detection of corrosion, impacts, marine fouling, and other problems that affect both the safety and energy efficiency of the vessel.
Traditionally, these inspections were carried out by sending diving equipment with cameras and specific toolsThis approach required complex organization: permits, prior planning, very strict safety protocols and, frequently, the shutdown of the ship's propulsion systems to avoid risks to the divers, which entailed a significant economic loss.
Furthermore, the weather and sea conditions They added a significant element of uncertainty. Waves, currents, or poor visibility could force the postponement of dives for safety reasons, impacting delivery deadlines, costs, and the vessel's operational planning.
With the arrival of ROVs for inspection, this scenario has changed radically. Today, inspections can be carried out complete hull inspections without the need for diversThis keeps personnel out of the water and reduces the number of vessel stops or slowdowns. The robot moves around the hull, records video, takes photographs, and collects data without exposing anyone to direct risk.
Another key advantage is the possibility of perform remote inspections in real timeModern ROVs allow experts located anywhere in the world to connect to the mission, view live images, request retakes, or request close-ups of specific areas without being physically at the port or base.
This paradigm shift has “democratized” underwater maintenance, making it easier to carry out Preventive maintenance actions, periodic marine fouling checks and energy efficiency checks more frequently and at a lower cost.
Professional underwater robotics: services and real-world applications
Companies specializing in underwater robotics, such as Controlsub SLThey have been pioneers in adopting these systems to offer advanced underwater inspection and surveying services. Their regular clients include oil companies, shipping lines, insurance companies, and other organizations that require reliable information on the condition of underwater structures.
To operate ROVs professionally, these companies have Highly qualified personnel in electronics, robotics, electricity and mechanicsIt's not just about knowing how to pilot an underwater drone, but about understanding its maintenance, sensor integration, communications, and the safety protocols associated with each type of intervention.
A representative example is the ROV Pollux IIIManufactured by the Italian company GEI and used by Controlsub, this equipment is designed to carry out inspections and work up to approximately [lengths/depths/etc.]. 1.000 depth meters, which places it in a category of vehicles capable of operating in very demanding environments.
This type of ROV typically works in campaigns where it is required document the condition of pipelines, platforms, hulls, port works or submarine cablesas well as performing light intervention tasks using manipulators and accessory tools.
The most interesting thing is that these robots allow you to combine them in a single mission. visual inspection, measurements, positioning and data recording which are then integrated into technical reports and expert opinions, reducing travel and working time compared to traditional techniques based solely on diving.
Camera and video system in inspection ROVs
One of the most important elements of any inspection ROV is its camera systemIn the case of the Pollux III, the main camera is installed inside a housing (POD) that allows a tilt angle of around 160 degreesThis makes it easier to visually cover large areas without having to move the vehicle excessively.
This ROV is capable of transmit up to two video channels simultaneouslySelected from up to four different sources. This makes it possible to combine, for example, a front-facing general inspection camera with another camera oriented towards a manipulator or tool, or to switch between high-definition cameras and cameras with high light sensitivity.
Common acquisition devices include conventional video cameras, HD cameras and specialized low-visibility video camerasMany units also integrate adjustable LED lighting to adapt the light to the turbidity and conditions of each underwater environment.
Thanks to this configuration it is possible to obtain high-quality recordings and image captures which are used as technical evidence in reports, insurance appraisals or damage documentation after an incident, something that provides enormous probative value compared to simple written descriptions.
The current trend in underwater robotics is towards higher resolution video, 4K cameras, stereoscopic systems, and optimized real-time streamingThis opens the door to collaborative inspections and the integration of artificial intelligence for automatic defect recognition.
Additional equipment: manipulators, sonar and positioning
In addition to their standard features, many professional ROVs like the Pollux III are complemented by a wide range of accessories and tools designed to adapt to the specific needs of each client or project.
Among the most common are the hydraulic or electric manipulatorsThese capabilities allow the robot to grasp, cut, pick up, or move objects underwater. This intervention capability transforms the ROV into more than just a mobile camera: it becomes a tool capable of actively participating in light maintenance tasks and supporting complex interventions.
In the field of positioning, ROVs can integrate acoustic localization systems, USBL, DVL and other navigation sensors which help to know precisely the location of the vehicle and the points inspected, something essential when working with extensive structures such as pipelines, offshore wind farms or cable networks.
Another key complement is the image sonarsespecially in waters with poor visibility. These technologies allow us to "see" through sound what the camera cannot capture, creating images of the environment that aid navigation and obstacle detection, as well as the inspection of elements hidden from the naked eye.
In addition to these components, it is common to find additional high-definition cameras, high-power spotlights, and specific modules for measurements, non-destructive testing, or integration with other underwater monitoring systems.
Software and automation in ROV operation
The software that accompanies modern ROVs plays a fundamental role in simplifying operation and to increase the safety and precision of the maneuversIt's not just about showing the video, but about helping the driver handle the vehicle more stably and efficiently.
Among the outstanding features of these programs are the modes of auto-heading and auto-depthwhich allow the ROV to maintain a certain direction or level automatically, freeing the operator from having to continuously correct for the action of currents, turbulence or changes in buoyancy.
The system usually also includes electronic compass and depth sensor calibration, with information displayed on screen so that the pilot is always aware of the orientation, depth and other critical mission parameters.
In the video section, the software can apply Image equalization, data overlay with text and graphics and advanced recording and file management options. This way, the monitors display not only the image, but also information such as date, time, heading, depth, and thruster status.
Many systems also show real-time diagnosis of propellers and other componentsas well as indicators for charge, power consumption, and alarms. The presence of a clock and the ability to synchronize the video with sensor data greatly facilitates subsequent analysis.
The data collected by the ROV can be exported using RS232 and USB interfacesadapting to the needs of each client. The exported information can include everything from basic navigation logs to broader sets of parameters, depending on how the system is configured for each project or contract.
Types of jobs and missions with ROV inspection
Inspection ROVs have established themselves as an extremely versatile tool for all types of underwater tasks in very different sectorsTheir capabilities range from simple observation tasks to more complex maintenance and rescue operations.
One of the most classic applications is the supervision and support for diversThe ROV can explore the area before they submerge, monitor the intervention in real time and act as an "extra eye" that provides another perspective, reducing risks and providing contextual information to the surface.
These devices are also very useful in light mechanical interventions, using manipulators and tools to loosen parts, operate valves, cut small elements or move objects that obstruct critical structures or passages.
Another fundamental field is the inspection and performance of non-destructive testing (NDT)where the ROV is combined with specific sensors to analyze thicknesses, detect corrosion, measure potentials or perform other checks without the need to dismantle the structure or take it out of the water.
In terms of maintenance, these robots can take care of Cleaning of structures, removal of marine encrustations, relocation of equipment and minor repairsespecially in areas that are difficult for divers to access or where the aim is to minimize human exposure time.
ROVs are also used in oceanography studies and scientific researchThey collect environmental data, record marine life, map seabeds, and document changes in sensitive ecosystems. Their ability to operate at great depths makes them invaluable for advanced research projects.
In more critical situations, they are used to recovery of structures, weaponry or miscellaneous objectsincluding accident debris and items of expert interest. Similarly, they may carry out cable and pipe cutting or participate in rescue and search operations for people or vessels in distress.
This combination of uses makes ROVs a kind of "Swiss Army knife" of the modern submarine operations, capable of adapting to very different projects using the same basic platform with different accessories.
Commercial solutions in underwater robotics and marine technology
Beyond large, custom-built systems, the market today offers a wide range of ROVs and marine platforms ready for use that cover both professional and semi-professional needs. Companies specializing in the Iberian Peninsula, such as ROV Expert Península, are dedicated precisely to advising, supplying and providing support for these types of solutions.
Their offering includes some of the Most popular ROVs and USVs (unmanned surface vehicles) in the sector, used both for industrial inspections and for research: models such as BlueROV2, Chasing M2 Pro Max, QYSea Fifish V6, BalticROV, Blueboat or GPA Seabots platforms have become benchmarks for their balance between performance, reliability and price.
These systems allow small and medium-sized enterprises, universities, or public bodies to have a proprietary tool for underwater inspection and exploration without needing to invest in overly complex or expensive solutions, always with the possibility of adding sensors and accessories as needs grow.
Along with ROVs and USVs, these types of companies offer an ecosystem of advanced sensors and complementary tools which greatly expand the capabilities of each platform. These include the Blueprint Subsea Oculus sonars, the Impact Subsea depth and attitude sensors, and the Cerulean Sonar acoustic and navigation systems.
They are also supplied Power tools for divers such as those from Nemo Power Tools, designed to work underwater in controlled drilling, cutting or tightening tasks, integrating underwater robotics with traditional professional diving interventions.
Likewise, importance is given to having a large stock of key brands such as Blue Robotics, Bluetrail Engineering, Deepwater Exploration, Cerulean or Nemo Power ToolsHaving components and spare parts in stock allows for fast shipments and immediate deliveries, which is essential when a project cannot wait for long import times.
The added value of these companies is not limited to selling products: they usually offer Consulting, training, systems integration and technical supportso that the client can start their underwater operations with peace of mind, knowing that they will have support in case of any incident.
This entire ecosystem of commercial solutions, specialized services, and tools for divers and robots makes the underwater inspection and robotics is within reach of many more players, making it easier for ports, shipping companies, engineering firms or research centers to incorporate this technology into their daily operations.
With the maturity of ROVs, the improvement of sensors, and the development of smarter software, underwater maintenance and inspection have gone from being slow, expensive, and highly weather-dependent processes to becoming much more efficient operations. secure, efficient, documented and accessible, marking a turning point in the way of working in marine environments.
