PCG Aircraft Dispatched Again to Drive Away Xiang Yang Hong 33 — Continued Operations Near Pag-asa Cays Mark Day 13 of Research Vessel Incursion

The Philippine Coast Guard dispatched a PCG Islander patrol aircraft on May 19, 2026 to continue pressuring the Chinese research vessel Xiang Yang Hong 33 in the Kalayaan Island Group area near the Pag-asa (Thitu Island) cays — Day 13 of the vessel's incursion into the Philippine maritime zone, which began at Reed Bank on May 7 and escalated with the reported landing of Chinese personnel on Sandy Cay 2 and Sandy Cay 3 on May 16-17. The aircraft issued repeated radio challenges in both English and Filipino in the Kalayaan Island Group area, consistent with PCG standard operating procedures for unauthorized vessel challenges under UNCLOS and Philippine domestic law. The PCG characterization of the Xiang Yang Hong 33's continued operations as 'illegal' was maintained, while China continued to describe its vessel's activities as 'legitimate ecological monitoring.' The extended duration of the standoff — 13 days as of May 19 — represents the longest single documented incursion by a Chinese research vessel into Philippine maritime zones without a kinetic response or a Chinese diplomatic acknowledgment of Philippine protests. The PCG's sustained aerial monitoring despite the lack of a kinetic Chinese response reflects Manila's 'transparency offensive' strategy of documenting and publicizing Chinese activities even when immediate removal is not achieved. No physical confrontation was reported on May 19. The investigation announced May 18 into the Pag-asa sandbar landing was described as ongoing.