Core Viewpoint - The article highlights the innovative collaboration between human divers and underwater detection robots in inspecting underwater bridge structures, specifically focusing on the Jining section of the Beijing-Hangzhou Grand Canal Bridge, enhancing efficiency and safety in bridge maintenance [1][4]. Group 1: Technology and Methodology - The underwater detection team, known as the "bridge doctors," utilizes a combination of human divers and advanced underwater robots to conduct thorough inspections of bridge piers [1]. - The underwater robot is equipped with capabilities for both swimming and adhering to surfaces, allowing it to navigate and scan bridge structures effectively using high-definition cameras and sonar technology [1][2]. - The inspection process involves a closed-loop system where the robot identifies anomalies that require human verification, ensuring a comprehensive assessment of the bridge's condition [2]. Group 2: Challenges and Training - Underwater inspections present unique challenges due to varying environmental conditions such as visibility, water flow, and temperature, requiring divers to possess extensive knowledge of bridge structures and emergency skills [3]. - Team members actively pursue additional certifications, such as welding and diving supervision, to enhance their ability to handle unexpected situations in complex underwater environments [3]. - The physical and psychological demands on divers are significant, as they work in cold, murky waters, often facing hazards like sharp structures and strong currents [3]. Group 3: Operational Insights - The inspection of the Beijing-Hangzhou Grand Canal Bridge took two days, revealing that the detected cracks were within normal limits, but the team remains vigilant for future inspections [3]. - The collaborative effort between divers and robots not only improves inspection efficiency but also ensures the safety and integrity of critical infrastructure [1][2].