Philippine forces took quick action when a foreign sub appeared in their waters. The navy ship and air-force planes (tasked with monitoring) tracked the vessel as it moved through South-China waters near the countrys western shores
Jonathan Malaya from National Security Council explained: the Russian underwater craft sent back a clear message when contacted by radio. It was heading back to its home-port in far-eastern Vladivostok after doing some joint-training with Malaysian naval forces
The sub — which was passing through international waters — followed standard maritime rules and gave proper identification. The Philippine military kept watch over the vessel until it left the area‚ showing their commitment to sea-zone monitoring