What is a significant advantage of using CCTV in sewer maintenance?

Using CCTV in sewer maintenance provides a significant advantage by allowing operators to visually inspect the interior of sewer pipes in real-time. This technology is equipped with cameras that can capture high-resolution images and videos of the pipe's condition, making it possible to identify and document pipe defects such as cracks, breaks, or corrosion.

Being able to see and record these defects is crucial for effective maintenance planning and prioritization of repairs. It enables maintenance teams to make informed decisions based on the actual condition of the pipes, thus potentially preventing more severe problems down the line, such as major blockages or infrastructure failure.

The other options, while relevant to sewer maintenance, do not fully encapsulate the primary advantage that CCTV provides. For instance, predicting sewer blockages or identifying sewer types can be part of the overall assessment but are not the main benefit. Similarly, while using CCTV might require less manpower or provide efficiency in some contexts, the core advantage lies in its ability to directly visualize and record the state of the pipes.