The Philippine Coast Guard (PCG) suspects a Chinese research vessel, Jia Hai, may have deployed an instrument during unauthorized marine scientific research off Batanes. Rear Adm. Jay Tarriela, PCG spokesperson for the West Philippine Sea, revealed the assessment came after monitoring the vessel's activities. The PCG is currently investigating the incident to determine the nature of the deployed instrument and its purpose. This event raises concerns about unauthorized research within Philippine waters. The PCG considers the activity a potential violation of Philippine sovereignty and maritime regulations. Further investigation is underway to gather more information and address the situation appropriately, with a focus on the waters off Batanes.