Project Description
Sealion deployed its ROV (Remotely Operated Vehicle) inspection capability to carry out two distinct but related underwater condition survey operations — a structural condition survey of steel tubular piles supporting a marine berth or jetty structure, and a live 4K CCTV hull inspection of a vessel's underwater hull surfaces. Both operations were documented in high-definition underwater video, providing clients with a clear, accurate, and fully recorded picture of underwater asset condition without the need for diver deployment at depth or vessel dry docking. The first operation — the ROV U/W Condition Survey of Steel Tubular Piles — involved deploying the ROV to systematically survey the full length of each pile from the seabed to the waterline, capturing detailed footage of the pile surface condition, corrosion status, marine growth coverage, cathodic protection anode condition, and any visible structural damage or section loss. The footage clearly shows the array of steel tubular piles rising from the sandy Red Sea seabed, with significant marine biofouling and calcareous growth visible on the pile surfaces — providing the asset owner with a clear and objective record of current condition and an evidence base for maintenance planning and cathodic protection renewal decisions. The second operation — the ROV CCTV Live Inspection in 4K — involved deploying the ROV alongside and beneath a vessel to perform a close-range live inspection of the underwater hull. The 4K footage captured the full bow section and hull curvature, allowing the inspection team to assess hull coating condition, identify any paint breakdown or corrosion patches, check sea chest areas, and record the overall underwater hull condition — all in real time, streamed live to the client's representative on deck. This type of ROV-assisted hull inspection is increasingly accepted by classification societies as a supplement or alternative to diver-conducted surveys in appropriate conditions, and delivers footage quality that far exceeds what can be achieved by conventional diver-held cameras. Together these two operations demonstrate Sealion's growing capability in ROV-assisted underwater inspection — a technology that extends the reach, depth, and safety margin of underwater inspection programs while delivering higher-quality visual documentation than has historically been possible with conventional commercial diving alone.
Key Achievements
- ROV condition survey of steel tubular piles completed from seabed to waterline with full video documentation
- Pile surface condition, corrosion status, marine growth, and cathodic protection anode condition all recorded
- 4K ROV CCTV live hull inspection completed with footage streamed in real time to client representative on deck
- Full bow section and hull curvature captured — coating condition, paint breakdown and sea chest areas assessed
- High-definition underwater video delivered to client as a complete, archived condition record
- ROV deployment eliminated diver depth-exposure risk while delivering superior footage quality and coverage