Hi there, I'm Robin. I'm supposed to do a presentation on underwater inspections and surveys. My preparation is going on and. It would be a great help if anyone could provide some information on Tunnel & Pipeline Inspections. Do they use any technologies for this? While searching online on this topic I happen to read about this Tunnel & Pipeline Inspections information and was quite informative and useful. If anyone has any knowledge on this, please mention it. Thank you.