An ROV was deployed to inspect the internal condition of a water tank, helping the client obtain clear visual evidence while reducing disruption, access complexity, and reliance on conventional entry methods.
OVERVIEW
A client required an internal visual inspection of a water tank to better understand the condition of the asset and support future maintenance planning. The tank environment presented a difficult access challenge, with conventional inspection methods likely to involve greater disruption, higher cost, and additional safety considerations.
To complete the inspection more efficiently, an ROV was deployed to carry out a remote internal survey of the tank. The system captured high-quality video and still imagery from within the asset, providing the client with clear visual evidence of internal conditions without relying on conventional personnel-based access methods.
THE CHALLENGE
The client needed to inspect the internal condition of a water tank in order to assess its current state and identify any visible issues that may require further attention. However, the asset was not straightforward to inspect using traditional methods.
Water tanks are often inherently difficult environments to access due to their enclosed internal layout, limited entry points, submerged areas, and operational constraints. In many cases, a conventional inspection would require a more intrusive approach, potentially involving draining, isolation, specialist access planning, confined-space controls, and a greater amount of time on site.
For the client, the challenge was not simply obtaining imagery from inside the tank — it was finding a practical inspection method that could provide meaningful visual evidence while reducing avoidable disruption and access complexity.
WHY CONVENTIONAL METHODS WERE LESS SUITABLE
A conventional inspection approach can introduce several challenges when dealing with internal tank environments.
Safety considerations
Internal tank inspections can involve elevated safety risks where personnel access is required. Even where entry is technically possible, enclosed or restricted environments often demand additional controls, permits, supervision, rescue planning, and more complex site coordination. These requirements can significantly increase the planning burden of the inspection.
Access limitations
Physical access is often one of the main barriers. Internal tank environments may have limited entry points, restricted movement once inside, difficult-to-reach submerged areas, or conditions that make traditional inspection methods less practical. In some cases, the difficulty is not just safety-related, but simply that access to the required inspection zones is limited or inefficient using conventional means.
Higher cost and disruption
Traditional approaches can also drive up the total inspection cost. Draining, isolating, preparing the asset for entry, and coordinating specialist personnel can all add time and expense. In addition, where the asset remains operationally important, the client may prefer to avoid unnecessary intervention that could impact service or introduce avoidable downtime.
For this project, the client required a lower-disruption alternative that could still provide clear and usable inspection evidence.
ROBOTIC INSPECTION APPROACH
To address these challenges, an ROV was used to carry out a remote internal inspection of the tank.
The ROV was deployed into the asset to capture video footage and still imagery of internal submerged areas and visible surfaces. This allowed the inspection to be completed without relying on direct personnel entry into the tank environment and without adopting a more intrusive conventional inspection approach.
Using the ROV, the inspection focused on:
- visually assessing internal conditions,
- reviewing submerged areas that would otherwise be difficult to inspect,
- capturing clear imagery for client review,
- and documenting visible observations to support reporting and next-step decisions.
This approach allowed the inspection to remain focused on the client’s actual need: obtaining reliable visual evidence from a difficult-to-access asset in a practical and efficient way.
INSPECTION SCOPE SUMMARY
- Remote internal visual inspection of the water tank
- Review of accessible submerged internal areas
- Capture of high-quality inspection video
- Capture of selected still imagery
- Identification and documentation of visible condition observations
- Preparation of a clear inspection summary and reporting output
INTERNAL CONDITION EVIDENCE
A key part of the inspection was the ability to capture clear internal visual evidence from areas that would otherwise be more difficult or more disruptive to inspect using conventional methods.
The ROV provided close-up imagery of internal surfaces and submerged areas, allowing the client to review visible condition, note areas of interest, and better understand the internal environment of the tank.
SAFETY & OPERATIONS BENEFITS
One of the main advantages of the ROV-based approach was the ability to reduce the dependence on more intrusive and personnel-intensive inspection methods.
By using robotic inspection, the client benefited from:
Reduced personnel exposure
The inspection reduced the need to place personnel into a restricted internal environment in order to gather visual evidence.
Lower access complexity
The use of an ROV helped avoid the additional access controls, planning measures, and logistical complications often associated with conventional internal tank inspection.
Reduced disruption
The inspection could be completed with a lower-disruption approach than would typically be expected from a more traditional inspection method.
More efficient evidence capture
The client received clear visual evidence from within the asset without the need for a more resource-heavy inspection setup.
Outcome
The inspection provided the client with a clear visual record of internal tank conditions, supported by video, still imagery, and a structured reporting output. This gave the client a practical basis for reviewing the asset, identifying any areas requiring further attention, and supporting maintenance or asset management decisions.
By using an ROV, the client was able to inspect a difficult-to-access internal environment in a way that reduced access burden, lowered disruption, and avoided the need for a more costly and operationally demanding conventional approach.
Key Benefits Delivered
- Internal tank inspection without relying on conventional personnel entry
- Reduced exposure to restricted-environment safety risks
- Lower-disruption alternative to more intrusive inspection methods
- Improved access to difficult-to-reach submerged areas
- High-quality video and still imagery for review
- Clear reporting to support maintenance and asset management decisions