MANILA — The Philippine Coast Guard has accused a Chinese research vessel of deliberately falsifying its location while loitering off Batanes, raising concerns over unauthorized marine research and the security of critical undersea communications infrastructure.
The vessel, identified as the Chinese-flagged JIA HAI KE 7, was detected about 38 nautical miles northwest of Itbayat, Batanes, within the Philippines’ exclusive economic zone. The area is close to Taiwan and sits along important submarine cable routes connecting the Philippines with Northeast Asia and the wider Indo-Pacific.
The Coast Guard said the vessel was not simply passing through the area. It was observed holding its position rather than maintaining a steady course, a pattern authorities said was consistent with marine scientific research activity rather than ordinary transit.
Philippine authorities also repeatedly challenged the vessel by radio, asking its crew to identify its intentions and stop what the Coast Guard described as unauthorized activity. The vessel reportedly did not respond to the radio calls.
The most significant concern emerged from an examination of the ship’s Automatic Identification System, or AIS. The system is designed to broadcast a vessel’s position and movement information, allowing maritime authorities and other ships to track it.
According to the Coast Guard, the JIA HAI KE 7 appeared to report an impossible sequence of locations. Its tracking data showed the vessel departing Xiamen in China’s Fujian province on Sept. 21 before appearing off Papua New Guinea later the same day, more than 2,000 nautical miles away, and subsequently broadcasting from northwest of Itbayat. Authorities said the sequence could not have occurred through normal physical movement within the reported time frame.
The Coast Guard assessed the inconsistent data as deliberate AIS spoofing intended to conceal the vessel’s actual movements. Officials said the ship was initially detected through the Coast Guard’s monitoring station in Itbayat rather than through its own AIS transmission. A Canada-provided Dark Vessel Detection system was then used to examine the suspicious tracking information.
The vessel itself is a relatively specialized ship. It is approximately 70 metres long and weighs about 2,000 tonnes, and open-source information cited by authorities describes it as a marine geological survey vessel equipped with a dynamic positioning system capable of keeping the ship precisely over a fixed point on the seabed.
That capability is significant because the waters around Batanes and the Luzon Strait contain submarine cable corridors carrying communications between the Philippines, Northeast Asia and other parts of the Indo-Pacific. The Coast Guard said a survey vessel concealing its position while maintaining a fixed location in such an area raises concerns about the security of those communications networks and the possible military value of information collected from the seabed.
The Coast Guard also pointed to international maritime rules requiring vessels to provide accurate AIS information. Authorities said the combination of allegedly falsified tracking data, the vessel’s refusal to answer radio challenges and its stationary movements heightened concerns about what the ship was doing in the area.
The incident comes amid continuing tensions over maritime activity in Philippine waters. Batanes is strategically located near the northern approaches to the Philippines and roughly 160 kilometres from Taiwan, making activity in the surrounding waters particularly sensitive.
The Chinese Embassy in Manila had not immediately responded to requests for comment on the Philippine Coast Guard’s allegations. The Coast Guard said it would continue tracking the vessel through monitoring stations, maritime surveillance flights and the Dark Vessel Detection system.
Philippine authorities said they would take measures under domestic law and the United Nations Convention on the Law of the Sea to challenge vessels conducting unauthorized activities in Philippine maritime zones. The Coast Guard’s assessment, however, remains an allegation about the vessel’s conduct; the reported tracking anomalies do not by themselves establish the purpose of any data the ship may have collected.
The episode puts renewed attention on the importance of monitoring research and survey vessels operating near critical infrastructure. With submarine cables carrying enormous amounts of international communications traffic, maritime surveillance increasingly involves not only monitoring territorial waters but also protecting infrastructure beneath the sea.
For the Philippines, the immediate focus will be on determining the vessel’s actual movements, activities and intentions while it remains under observation. The larger concern is whether increasingly sophisticated vessels and tracking-avoidance techniques could make it harder for coastal states to identify and respond to unauthorized activity near strategically important waters.
