Wuhan Communications Bureau Addresses Vessel AIS Trajectory Jumping Issues on Yangtze River

The Wuhan Communications Bureau has taken targeted action to resolve issues with abnormal vessel AIS trajectory data on the Yangtze River. This initiative is part of broader efforts to enhance the management of maritime radio communication order and advance specialized radio rectification work along the Yangtze trunk line.

On May 21, a specialized team from the bureau's monitoring center, in collaboration with technical personnel from the communications department and the Jinkou Maritime Safety Administration, conducted a field inspection focused on AIS data governance. The primary objective was to address the problem of vessel AIS trajectory "jumping" or providing inaccurate positioning data.

The inspection specifically targeted the vessel "Su Yan Huo XXXX," which had recently exhibited abnormal trajectory data on the smart regulatory platform. This vessel's AIS data showed frequent trajectory jumps and inaccurate positioning. To diagnose the issue, staff rigorously followed maritime radio equipment testing standards, utilizing an AIS integrated tester to precisely measure the VHF antenna's standing wave ratio on the vessel. They simultaneously conducted tests on the equipment's transmission and reception sensitivity.

A comprehensive scan of the surrounding maritime radio frequency environment was also performed to rule out any potential external signal interference. Following a thorough analysis, the team concluded that the trajectory jumping was caused by aging AIS equipment and a malfunctioning positioning module.

Upon completing the on-site inspection, officials provided the vessel's crew with a detailed briefing on maritime radio management regulations and the proper operational standards for AIS equipment. They emphasized requirements for regular equipment maintenance, correct installation procedures, and compliant usage. The vessel operator was instructed to implement immediate corrective actions, including repairing or replacing the faulty equipment and ensuring proper cable installation. These measures are intended to guarantee normal AIS operation, accurate trajectory positioning, and stable signal transmission.