Why is a rusty Philippine warship implicated in the South China Sea dispute? California18 11 months ago The BRP Sierra Madre, and in the background a Chinese Coast Guard ship (Reuters) Aerial view of the BRP Sierra Madre at Second Thomas Shoal (Reuters) (Reuters) The Philippines summoned the Chinese ambassador for consultation after the attack with water cannons on its Coast Guard vessels The Philippines denounced that the Chinese Coast Guard fired water cannons at its patrol boats