Connect with 4Sight to discover how CCTV and sonar inspection can reduce risk and strengthen outcomes on your next project.

CCTV systems offer several key advantages over basic sonde locating. With a sonde built directly into the camera head, the system can detect the position of the camera while simultaneously identifying tee connections and other critical observations along the line. When connected directly onto the utility, the entire line becomes traceable, saving significant time and effort compared to sonde-only locating. The onboard computer supports user input, records high-quality video, and saves footage to multiple storage formats for documentation and reporting.
Like sonding, CCTV inspection requires an accessible entry point on the utility in order to introduce the camera into the line.
Where CCTV has limitations, particularly in submerged or flowing conditions where camera visibility is reduced to near zero, sonar inspection fills the gap. Using acoustic pulses to map the interior geometry of a pipe, sonar can identify sediment buildup, structural defects, and cross-sectional irregularities that a camera cannot capture below the waterline. This makes it an essential tool for fully submerged infrastructure, aged sewer systems, and any environment where murky or high-flow conditions would otherwise make inspection impractical or unsafe.
Together, CCTV and sonar deliver a comprehensive view of pipeline condition, supporting better risk identification, more informed design decisions, and stronger project outcomes.

Choosing the right inspection partner can significantly influence what you know, when you know it, and how confidently your team can act on it. 4Sight stands out because we combine advanced inspection capabilities with deep subsurface expertise and a project-first approach.
What Sets 4Sight Apart
1. Technology Leadership
We deploy some of the most capable inspection systems available, including imaging sonar that maps pipe geometry in fully submerged, zero-visibility conditions where standard cameras cannot operate.
2. Proven Experience on High-Stakes Projects
Our team regularly supports municipal, transportation, utility, and large-scale infrastructure projects where accurate subsurface data is non-negotiable.
3. Integrated SUE Approach
Inspection findings are never delivered in isolation. We integrate CCTV and sonar results directly into the broader Subsurface Utility Engineering (SUE) process, ensuring data informs conflict analysis, design coordination, and risk reporting across the project team.
4. Fewer Surprises, Lower Risk
By coordinating inspection early and integrating findings into the SUE process, 4Sight helps teams identify structural defects, sediment buildup, and misaligned joints before design is finalized, reducing conflicts, change orders, and costly delays once construction is underway.
5. Decision-Ready Deliverables
We produce clear, design-usable outputs including high-quality video records that support engineering decisions, stakeholder reporting, and regulatory requirements.
6. Reduced Need for Invasive Investigation
By coordinating a thorough inspection program from the outset, 4Sight helps reduce reliance on unnecessary excavation, protecting project budgets, minimizing community disruption, and supporting safer, more efficient delivery.
Connect with 4Sight to discover how CCTV and sonar inspection can reduce risk and strengthen outcomes on your next project.
P: 1 (289) 385-3303
E: info@4SightUE.com
4Sight Head Office
2100 Forbes Street, Unit 1
Whitby, ON
L1N 9T3
126 Market Street
Commercial Unit #1
Philadelphia,
PA 19106
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