Remote Inspection Techniques Are Reshaping the Hull Survey, Not Replacing the Surveyor
Drones, crawlers and remotely operated vehicles are now an accepted part of the class surveyor's toolkit. The value they add depends less on the hardware than on the judgment applied around it.
Remote inspection techniques, commonly grouped as RIT, have moved from novelty to routine on many surveys. Classification societies have published guidance for using unmanned aerial vehicles, magnetic crawlers and remotely operated vehicles in place of, or alongside, traditional close-up work. The International Association of Classification Societies set the direction years ago with its recommendation on remote inspection, and individual societies such as ClassNK have issued their own procedures for drone use in class surveys.
The safety case is straightforward. Ballast tanks, cargo holds and topside structures often require staging, rafting or rope access, all of which put people in confined or elevated spaces. A drone or crawler can carry a camera into those areas first, letting the surveyor decide where physical access is genuinely needed.
The quality bar has not moved, though. Class requirements expect remote imagery to resolve detail equivalent to what a surveyor would see by eye at close range, roughly a metre and a half from the surface. Poor lighting, drift or low resolution can mask the corrosion, cracking and coating breakdown that matter most.
For operators in the Niger Delta and West African waters, the practical lesson is that RIT shortens exposure and can speed a survey, but it does not remove the need for an experienced eye reading the images and calling the follow-up.
Sources & further reading
Need a survey or inspection?
We mobilise to any port or offshore location in Nigeria. Tell us the vessel and the scope and we will handle the rest.
Request an inspection
