Underwater structures aren’t visible to us in day to day life, so they must be inspected regularly to ensure safety and proper function. Often it means diving. Diving is always risky, especially if you do not know what lies beneath the surface. Minimise the risks (and costs) by reducing the need for diving and by being better informed, when you must send a diver to inspect or repair.


Underwater constructions must be inspected regularly. That way you can avoid the risks and costs of not noticing changes and damages, which obviously means less accidents.

But the most common way of inspecting underwater structures, diving, is also risky. That relates to its price: diving inspections are expensive and slow to perform. In some cases, it leads to avoiding or postponing inspections. In result of that some severe damage might be found too late.

The problems of diving:

  • poor visibility
  • high costs
  • slow
  • difficult navigation
  • dangers always present
  • safety precautions affect the asset’s routines and functions

This brings us to the secret of cost-effectively and safely reducing diving in your asset.

Comparison of diver's view under water and underwater multibeam data


Avoid unnecessary and risky diving

So, you don’t want to pay too much, nor do you want to perform unnecessarily risky diving… So, what do you do? You use multibeam sonar surveys and based on the detailed data received focus the diving to the most needed places and moments.

For example: instead of diving two kilometres inspecting all quay structures, inspect two metres where problems are known to locate, and be prepared to what lies beneath the surface.


Sonar inspections and 3D data give detailed information

VRT is specialised in underwater surveys with high and innovative technology that provides you with detailed 3D data. With multibeam echo sounder and laser scanning we can get a much better view of the bottom than any eyes or cameras can capture. With our survey boat we can do the scanning fast and without disturbing the location’s routines. You can read about our inspection process here.

But not to worry, we do not make the profession of divers useless. Quite the contrary: after we deliver the reports and point out the problematic and damaged places, diving might needed to investigate more closely or implement necessary changes. But with our findings you know exactly, when and where to send them. If there are collapsed structures, particles or sediment, the divers can prepare accordingly.

Most of our customers use divers as well, but they no longer have to rely on their findings alone.

Read case story: Sonar scans to supplement diving at Kuopion Vesi


Does this sound interesting to you? If you would like to know more, how your underwater structures could benefit from our services, fill in the form below!

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Karri Kolehmainen & Ville Mäkeläinen

Myynti ja asiakkuudet

Karri Koistinen

+358 40 0604927




Ville Mäkeläinen

+358 44 513 2222



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