Remotely Operated Vehicles 

ROVRemotely Operated Vehicles are water-submersible robots. For NDT, they are used to remotely deploy various sensors and inspection systems. Historically, ROVs have been used to deploy cameras for remote visual inspection in places such as radioactive storage ponds[1] and subsea oil & gas assets[2].

Over the years, advancements in robotic arm dexterity, ROV positioning systems and flaw detector capabilities have enabled advanced NDT to be deployed with ROVs, including corrosion mapping using conventional ultrasonic and pulsed eddy current testing and crack detection using time-of-flight diffraction and ultrasonic phased array[3].

For more information on ROVs, see:
1. ‘ROVs at Sellafield’, Sellafield Ltd. Available at:
2. ‘Remotely operated vehicles’ (ROVs), Oceaneering Ltd. Available at:
3. ‘Asset deployed inspection’, Sonomatic. Available at:

WHAT THE HEC?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: