The Ancient Invention That Inspired Modern Canal Gates

Invention on Instagram: "Installing aviation warning balls on transmission lines is a specialized task that helps make power lines visible to low flying aircraft. These bright marker spheres are commonly placed near airports rivers valleys and mountain passes where pilots need clear visual cues to avoid dangerous obstacles. The work often requires linemen to access long uninterrupted spans where traditional tower to tower climbing would be inefficient or unsafe. To do this linemen use rolling ri