The Philippine Coast Guard (PCG) challenged and drove away the Chinese research vessel CRV Tan Suo 3 for allegedly conducting illegal marine scientific research within the Philippines' Exclusive Economic Zone (EEZ) off Ilocos Norte.
The PCG spokesperson for the West Philippine Sea, Commodore Jay Tarriela, stated that the vessel's deep-sea mapping capabilities could support submarine navigation and deployment.
The PCG deployed assets, including the BRP Teresa Magbanua, to challenge the Chinese vessel and ensure compliance with Philippine laws.
During the operation, PCG personnel observed the 'Shenhai Yongshi' or 'Deep-Sea Warrior' submersible being retrieved by the Chinese vessel.
The Chinese research vessel did not respond to radio challenges while it was reeling in its submersible.
The PCG monitored the vessel for almost two days before deploying a ship to escort it out of the Philippine EEZ and document its activities.
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