In recent times, concerns have risen regarding the activities of Chinese research vessels in the Indian Ocean, specifically their potential for espionage targeting India. These concerns are amplified by the advanced capabilities of these ships and the timing of their deployments, often coinciding with Indian military activities.

Several incidents have fueled suspicions. For instance, the Chinese vessel Da Yang Yi Hao was spotted in the Indian Ocean near India's Andaman and Nicobar Islands, heading towards the Arabian Sea, where the Indian Navy was conducting Operation Sindoor. This deployment occurred shortly after India's strikes on terror camps in Pakistan, raising suspicions of intelligence gathering. The Da Yang Yi Hao is equipped with advanced geo-sensors, powerful sonar arrays for submarine tracking, and satellite uplinks capable of monitoring low-orbit satellites. Such equipment could be used to gather data on Indian naval movements, military mobilization, and weapon deployments.

Similarly, the Yuan Wang series of Chinese tracking ships has repeatedly entered the Indian Ocean before Indian missile tests. The Yuan Wang 7, in particular, has been identified as a vessel equipped with advanced technology for tracking missiles and satellites. These ships often operate near "no-fly zones" declared by India for missile tests, raising concerns about their intent to monitor these activities. India has even delayed missile launches due to the presence of these vessels. These ships are equipped with sophisticated sensors and communication tools, enabling them to monitor activities in space, including missile launches and satellite movements.

China maintains that these vessels are for scientific research. However, India remains wary, viewing the Indian Ocean as its sphere of influence. The "research" activities are seen as a cover for gathering strategic data and monitoring Indian military activities. These ships can map ocean floors, track missiles, and monitor submarines. Some reports indicate that these vessels intentionally disable their Automatic Identification System (AIS) to conceal their presence.

The Indian Navy is actively monitoring the movements of Chinese vessels in the Indian Ocean. Surveillance aircraft are deployed to track these ships, and warships are put on alert. The Indian government is also taking diplomatic steps to address these concerns.

The presence of Chinese research vessels in the Indian Ocean highlights the ongoing geopolitical tensions between China and India. India's concerns revolve around the potential for these vessels to gather intelligence on its military activities and strategic assets. China's increasing presence in the Indian Ocean is viewed as a challenge to India's regional influence.