“In the performance of our duties, we will not resort to the use of force or intimidation, or deliberately inflict injury or harm to anyone,” Marcos said.
He did not name China in his speech.
Beijing’s actions during a routine Philippine resupply mission have been condemned by the United States, Britain and Canada.
China’s foreign ministry disputed the Philippine account, with a spokesperson saying on Thursday that the necessary measures taken were lawful, professional and beyond reproach.
China claims almost the entire South China Sea, a conduit for more than US$3 trillion of annual shipborne commerce, including parts claimed by the Philippines, Vietnam, Indonesia, Malaysia and Brunei.
In 2016, the Permanent Court of Arbitration in The Hague said China’s claims had no legal basis, a decision Beijing has rejected.