A Philippine Coast Guard patrol ship issued a radio challenge to Chinese vessels off Zambales province due to their illegal presence in the West Philippine Sea.

The China Coast Guard (CCG) vessel 5901, the so-called “monster ship”, has departed from the coastline of Zambales, the Philippine Coast Guard (PCG) said on Wednesday. “Based on the Philippine Coast Guard's (PCG) current monitoring,

House Assistant Majority Leader and Zambales Rep. Jefferson Khonghun on Wednesday expressed outrage over the reported presence of massive China Coast

The Monster,” China’s biggest coast guard ship, has moved away from Zambales province although a “replacement vessel” has taken its place.

China's largest Coast Guard vessel has begun to sail away from the waters off Zambales after loitering there for four days, only to be replaced by another Chinese ship in what authorities call a calculated move to maintain Beijing's illegal presence in the area.

CCG 5901 had already left the coastline off the Philippine province of Zambales, the Philippine Coast Guard said.

Malacañang yesterday expressed concern over the presence of what has been described as a Chinese “monster ship” off the province of Zambales, even as it gave assurance that the latest intrusion into the West Philippine Sea is continuously being challenged.

A Chinese navy helicopter hovered over a Philippine Coast Guard (PCG) vessel as China's monster ship lingered in Philippine waters. Footage shows the People's Liberation Army-Navy (PLA-N) aircraft with tail number 47 circling above the PCG BRP Cabra monitoring the gargantuan China Coast Guard (CCG) vessel 5901 some 70 nautical miles off Zambales province on January 7.

The PCG has been monitoring the "monster ship" since last Saturday, when it was spotted by the Dark Vessel Detection system 54 nautical miles off Capones Island in Zambales.