The Philippines, a U.S. ally, has hailed as a “game-changer” the delivery of new supersonic missiles that it believes will significantly beef up its coastal defenses amid rising tensions with China.

The first batch of BrahMos cruise missiles, ordered from India two years ago, arrived at Clark International Airport north of Manila on Friday. It was handed over to the Philippine marines to be deployed at an as yet undisclosed location within the country’s archipelagic territory.

The high-profile arms transfer comes in the middle of the simmering Philippines-China dispute in the contested Spratly Islands archipelago of the South China Sea, where the Chinese and Philippines coast guards have clashed over territorial features claimed by both sides.