Say you run public works for a small town, and nobody has looked inside the reservoir on the hill for years. An underwater drone inspection is usually the first thing worth asking about. A small robot does the looking while your people stay dry.
But a camera on a cable is only half the story. Plenty of owners get a video and still have no idea what to fix. So here’s what a good inspection looks like, and the questions that save you from footage nobody can use.
Why Draining a Tank Isn’t Always the Plan
The Usual Shutdown
Picture the usual routine. Somebody books a shutdown and a whole neighbourhood gets a notice taped to the door. It works, sure. It’s also slow, and the real cost hides in lost hours and angry phone calls.
Ven Tech Subsea sees it from the other side. The Canadian company has worked since 2014, and its team says remote methods and focused mobilizations can reduce exposure and disruption. Worth asking any crew how they’d cut the disruption on your tank.
Divers, Robots, or Both
Some tanks want a diver. Some are better left to a robot. A few need both, and that’s fine. Ven Tech says its crew compares access methods and controls worksite risk before choosing a platform, so the equipment follows the asset instead of the other way around.
Their reservoir work covers potable water and fire water tanks, from inspection and cleaning to condition documentation. Diver methods and robotic methods both sit on the menu. Which one you end up with depends on what’s inside and how it can be reached.
What You Should Get Back
More Than a Video
Here’s where people get surprised. The video is the easy part. What matters is what comes with it: annotated video and stills that show what was inspected and where, plus observation records. A clip that says something looks off on the left wall won’t help an engineer much.
That’s why an underwater drone inspection from Ven Tech Subsea starts with an evidence plan, before anyone launches a robot. Coverage, measurements and records stay tied to the scope. Limitations get written down too. Sounds dull until a board member asks what wasn’t seen.
Measuring What Can’t Be Seen
Murky water hides a lot. That’s where sonar comes in. Ven Tech lists multibeam imaging sonar and 3D photogrammetry among its robotic services, and those can turn a dark corner into spatial information an engineer can actually measure.
Their own pitch is see it, measure it, use it. Visible condition, measured geometry, traceable records and a clear next step. Honestly, that’s a better test of a contractor than the size of their robot.
A Report Nobody Could Read
The Thumb Drive Problem
Imagine a manager who hires the cheapest crew on the list. The video arrives on a thumb drive, forty minutes long, no notes, no location data. Three people watch it. Two disagree about what’s on the screen, and the third goes to lunch.
Now flip it. Ven Tech’s deliverables can include annotated video and stills. Observation logs, measurements, location data and defect summaries are on the list too, along with recommended next actions, and the scope decides which ones show up.
Who Actually Reads It
Different people open that report for different reasons. An engineer wants numbers. A maintenance lead wants to know what to fix first. Somebody in compliance just wants to see that the work was documented and the limits were stated plainly.
Ven Tech says deliverables are organized for engineering, maintenance, compliance and planning teams. That’s four audiences, which is a lot for one document, so ask early who will read yours and what they’ll do with it.
Safety Before the Splash
The Routine Before the Robot
A tank isn’t a swimming pool. There are hazards in the access and in the water. Ven Tech’s routine starts with a scope and hazard review. Then come checks on people and gear, plus emergency planning and documented procedures. Stop work authority is part of it.
The company also built a proprietary system called ATHENA over more than two years of development. It helps connect intake, safety planning, field work and documentation, while qualified people stay responsible for decisions. Worth asking any contractor what ties their paperwork together.
Paperwork You Can Ask For
Standards matter for tanks that hold drinking water. Ven Tech says its reservoir workflows are aligned with applicable AWWA requirements, and its fire water tank support lines up with applicable NFPA programs. Project requirements get confirmed during planning, not guessed at later.
On the contractor side, the company lists BCCSA COR certification, ISNetworld membership, Avetta approval and Cognibox certification. Status can change, so ask for current proof before you sign. Honestly, any good contractor expects that question.
When One Robot Isn’t Enough
Tanks, Pipes and Everything Else
Reservoirs rarely sit alone. There’s an inlet pipe somewhere, a valve chamber, maybe a penstock further down the line. Ven Tech runs pipe crawlers and confined space systems for that kind of thing, and it also does hydrographic surveys with unmanned surface vessels.
That’s the part owners tend to like. One team, one set of records, one phone call. The homepage puts it as one partner, surface to subsea.
Where an Industrial Drone Inspection Fits
Above the waterline, an industrial drone inspection from the company’s UAS team can handle aerial inspection, LiDAR, mapping and thermal imaging. Photogrammetry and specialized remote access support are on the list too, aimed at complex sites.
So a single mobilization could, in theory, cover the tank, the pipe feeding it and the site around it. The company says a project may use one platform or a coordinated mix of divers, ROVs, crawlers, drones and survey systems.
Getting Ready to Ask for a Quote
Start simple. Tell them what the asset is and where it sits. Then add what you already know about its condition and when you need the work done.
Old drawings and photos help, and so do past reports. The technical team uses them to pick the safest and most practical field approach. No paperwork at all? Say so, because that’s useful to know too.
Last Thoughts
Good inspections are boring in the best way. The plan comes first, the robot second, and the report is something a real person can read. If your reservoir is overdue for a look, an underwater drone inspection planned around the asset is a fair place to start, and an industrial drone inspection of the site above it can sit in the same conversation.
FAQs
What is underwater drone inspection used for?
It lets a team look at tanks, pipes and other submerged assets with a robot, often before anyone has to go in. Ven Tech uses ROVs and crawlers for this, and brings in divers when the job calls for it.
Does Ven Tech Subsea offer industrial drone inspection?
Yes. The advanced UAS team runs industrial drone inspection work with aerial inspection, LiDAR, mapping, thermal imaging and photogrammetry for complex sites.
What do I get after the work?
It depends on the scope. It can include annotated video, stills, observation logs, measurements, sonar or mapping outputs, 3D models and a list of limitations with next steps.
Where does Ven Tech Subsea work?
Across Canada, with seven operating locations and a long record in Western Canada. Mobilization and crew are confirmed for each scope.
