China tightens its grip on the West Philippine Sea

China claims the entire South China Sea through its sweeping nine-dash line, despite the Hague invalidating its claim in a 2016 ruling

19 August 2025

A week ago, a Chinese warship collided with a vessel from its own coast guard following a high-speed chase with a Philippine patrol boat in the West Philippine Sea.

The incident took place near Scarborough Shoal, a traditional fishing ground for Filipino fishermen, located within the Philippines' exclusive economic zone but has been controlled by China since 2012.

The Philippines asserts rights to its traditional fishing grounds and islands in the West Philippine Sea. Of the 40 features it claims, Manila occupies just nine.

TAIWAN

China’s nine-dash-line encroaches on Southeast Asian countries’ exclusive economic zones

Occupied

Unoccupied

Paracel Islands

PHILIPPINES

VIETNAM

Spratly Islands

MALAYSIA

150 km

TAIWAN

China’s nine-dash-line encroaches on Southeast Asian countries’ exclusive economic zones

Occupied

Unoccupied

Paracel

Islands

VIETNAM

PHILIPPINES

Spratly

Islands

MALAYSIA

150 km

Beijing claims the islands and features in the entire South China Sea through its sweeping nine-dash line, and its refusal to recognize a 2016 ruling by the Permanent Court of Arbitration at the Hague meant that Philippine vessels have been subject to China's aggressive actions in the West Philippine Sea.

Chinese vessels have repeatedly swarmed near these outposts – intimidating fishermen and blocking Philippine Coast Guard patrols.

Week after week, Philippine patrols record new encounters.

Chinese Coast Guard swarm nearby Filipino fishing ground everyday in 2024

Scarborough Shoal, called Bajo de Masinloc in the Philippines, is a traditional fishing ground for Filipino fishermen.

Total Sightings per Week
1 week

The Philippine Coast Guard patrolling the shoal saw Chinese Coast Guard (CCG) vessels 149 times in March 2024 – the most sightings they have had that year.

In that month, CCG vessel 3066 and 3065 patrolled the area almost everyday, with at least 2 or more vessels.

Overall, the Philippine Coast counted 20 CCG vessels over 1,000 times across 2024, patrolling Scarborough Shoal, that they had to accompany fishermen to be able to do their livelihood.

China's "monster ship" CCG Vessel 5901 – one of Beijing's largest vessels spanning 165 meters – was spotted near Scarborough Shoal three times – often with four other vessels.

To explore, click the dropdown to see how many times each vessels were spotted near Scarborough Shoal.

Kalayaan Island, one of Manila's key strongholds, now sits under the shadow of Beijing's growing presence.

Chinese coast guard and militia ships move in tight formations, circling nearby features, and tailing patrol boats.

Each maneuver carries the same message: These waters belong to China.

SWARMING. Chinese vessels (small dots on the left) have been swarming nearby Pag-asa Island (Thitu Island), a Philippine-occupied feature in the South China Sea.