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ASI Group Ltd.

  • geophysical equipment
  • sonar imaging
  • Vessels



P.O. Box 2205, 250 Martindale Road
St. Catharines Ontario L2R 7R8

ASI Group Ltd.(ASI), founded in 1987 as Aquatic Sciences Inc., is a full-service engineering and marine technology company comprised of two groups; ASI Marine, which offers a full range of underwater inspection, mapping and light construction services, and ASI Water which has extensive experience in design, build, and operation of drinking water and wastewater systems and biofouling control operations.

ASI Marine provides industries and governments worldwide with leading-edge underwater services focused on the assessment, maintenance, rehabilitation, and construction of underwater infrastructure and environments. More specifically, ASI Marine specializes in commercial diving, underwater remotely operated vehicle (ROV) operations, and marine geophysical and hydrographic surveys. Our underwater ROV operations take place in both contained environments (e.g., inside tunnels, pipelines, etc.) and non-contained open water environments (e.g., dock/dam inspections, pipeline/cable route inspections, intake/outfall inspections, target identification, etc.).

Throughout the past 30 years in business, our strongest asset has been the ability to offer a full service approach - from initial problem identification to the development and implementation of the appropriate solution.

Our services are provided throughout the world from offices located in St. Catharines, Sarnia, and Vancouver, Canada; Orchard Park, New York, USA, Chile and Singapore.


ASI Group owns and operates a diverse fleet of advanced remotely operated vehicles (ROV’s) that services a wide range of industries. Combined with the latest in video capture and sonar imaging, specialized ROV tooling and inspection techniques, ASI’s ROV division has earned international reputation for the highest standards of quality.

ASI’s Remote Services include: •Long Tunnel & Pipeline Internal Inspections •Underwater Asset Inspection & Maintenance •Remote Infrastructure Repair •Remote Cleaning •Underwater 2D Imaging & 3D Sonar Modelling

ASI’s personnel have both domestic and international experience with over 40 years of providing geophysical services. This, combined with ASI’s extensive inventory of the latest geophysical equipment, enables us to provide a broad range of techniques to conduct any underwater investigation. •Single & Multibeam Bathymetric Surveys •Navigation & Positioning •Dredging Surveys & Volumetric Determination •Search & Recovery •Side-Scan Sonar Surveys •Environmental Monitoring & Sampling •Tidal Studies & Current Monitoring •Open-water Remotely Operated Vehicle (ROV) Investigations •Unmanned Survey Vessel (USV) Inspections

We collect, process, and interpret underwater data in order to provide detailed reporting that specifically addresses our client’s issues.

All equipment can be supported by an ASI Survey Vessel. Many of our vessels are easily transportable and can be equipped with a wide variety of survey packages.

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