In which situations are Linewalkers preferred over aerial patrol?

Linewalkers are preferred in densely populated areas for several important reasons. First and foremost, the presence of people and infrastructure in these locations requires a more focused and detailed inspection that can be achieved through ground-level observation. Aerial patrols, while offering an overview of the area, may miss specific details that are critical to ensuring safety and compliance in densely populated regions.

Additionally, ground crews can more easily access the pipeline and its surroundings, allowing for the identification of issues not visible from the air, such as encroachments, vandalism, or construction activities that may affect the pipeline's integrity. Linewalkers can also engage with the community and gather information from local residents, which can be invaluable for understanding the area's specific concerns and potential risks.

In contrast, options such as remote locations, high-altitude flights, and offshore environments present challenges that are better suited for aerial surveys due to their expansive and less accessible nature, where visual coverage from the air can provide wider-ranging insights than what might be achievable by foot.