A BASE OF SOVEREIGNTY: PHILIPINNES’ PERMANENT COAST GUARD IN THE SOUTH CHINA SEA

WHAT HAS HAPPENED?

On the Philippines' Day of Valor,  Manila made a pointed statement in one of Asia's most contested waters. The country has officially, on April 9, 2026, opened a permanent coast guard command centre on Thitu Island, a small but strategically significant outpost in the Spratly Islands, deep within the territory of the disputed South China Sea.

The new Philippine Coast Guard district is slated to oversee roughly 68,000 sq km of contested ocean, commanded by a senior officer with permanently stationed ships and specialist crews with plans already underway to dredge a deeper port capable of handling larger vessels, and to upgrade nearby Philippines held islets into full coast guard stations. The new command will also serve, roughly 400 civilians who live and work on the island, bringing improved funding for schools, healthcare, and basic services. Therefore, it is not merely a military position but one that also constructs an entire world unto itself.

The timing feels deliberately chosen, seeing as the Chinese coast guard ships have recently grown increasingly assertive around Thitu in recent months. They have been issuing radio warnings to Philippines aircraft and, in one particularly alarming incident late last year, China even deployed water cannons, near Escoda Shoal that left Filipino fishermen injured. Manila's action of establishing this base clearly shows its strong stance against the passive and occasionally aggressive tactics deployed by China. The message of its independence from this coercion seems even stronger when coupled with Manila claiming the base to serve as the “steadfast sentinel” of its sovereignty. 

THE IMPORTANCE OF THITU

Less than a mile long, the Thitu island sits quietly among the Spratly Islands in the South China Sea, home to roughly 250 civilians. But as small its geographical size may be, its geopolitical importance is immense. The island sits at the intersection of some of the world's most contested maritime territory. The waters surrounding it contain rich fishing grounds and critical shipping routes that carry an estimated one-third of global trade annually. 

It is clear that whoever controls the sea will exert a lot of influence in the region. China has been actively trying to establish this control. Its decade-long campaign to construct artificial islands, deploy coast guard fleets, and assert historical ownership over nearly the entire South China Sea has been a calculated attempt to reshape the regional order. 

On the other hand, Thitu stands directly in the path of that ambition as the Philippines hosts its civilians there. This will cause China to be extra cautious in regard to its aggressive manoeuvres in the region. 

CHINA & THE CONTROVERSY OF SOUTH CHINA SEA

The South China Sea is a significant trade route, as well as a source of untapped 11 billion barrels worth of oil and 190 trillion cubic feet worth of natural gas. It has been a ground of conflict due to dominance asserted by several countries that share territory with the water body. China’s ‘nine-dash line’ claim, which covered roughly 90 percent of the sea, drawn without clear legal basis, had been long contested since the early 1970s by China’s neighbours that shared the sea as well, that is, Brunei, Indonesia, Malaysia, the Philippines, Taiwan, and Vietnam.

On 12 July 2016, the Permanent Court of Arbitration dealt China a significant legal blow as it ruled overwhelmingly in favour of the Philippines, in a case Manila had filed, three years earlier. At the heart of the dispute was the China's ‘nine-dash line’. The tribunal's findings held that China's historic rights claim, within the nine-dash line, had no standing under international law. None of the land features, that China claimed in the Spratly Islands, qualified as islands, capable of generating a full 200-nautical-mile economic zone. Additionally, the Tribunal held that China had also violated the Philippines' sovereign rights by blocking Filipino fishermen, interfering with oil exploration, and causing serious environmental damage through large-scale land reclamation on coral reefs.

China called the ruling "null and void." and refused to participate in the proceedings from the start, it also began a global diplomatic campaign to discredit the process, and placed advertisements in major international newspapers arguing its case, with the State media calling the verdict a politically motivated farce.

The ruling technically binds China under the UN Convention on the Law of the Sea (UNCLOS)), which it had ratified, but was never implemented by China. A decade later, China's footprint in the South China Sea has only increased with the augmented presence of artificial islands, military installations, coast guard patrols, and an increasingly assertive presence throughout the contested waters.

WHY THE SOUTH CHINA SEA IS IMPORTANT TO CHINA

Beijing's sweeping territorial claims, its construction of artificial islands, and its increasingly aggressive posture toward neighbors like the Philippines and Vietnam are not isolated provocations but part of a broader strategy.

Control over the South China Sea gives China leverage over critical shipping lanes that carry a third of global maritime trade. Moreover, it provides a buffer zone for its naval forces and positions the People's Liberation Army closer to Taiwan, whose absorption Beijing treats as natural and true to their historical claims. The Taiwan Strait, which connects the South and East China Seas, sits at the center of this calculus.

Additionally, China's assertiveness in the South China Sea is not only territorial. It is, in significant part, also driven by fear. For nearly two decades, Chinese strategists have watched a network of American alliances and partnerships tighten steadily around their borders. What the Chinese fear is an event termed as encirclement. As the United States deepened defense ties with Japan, Vietnam, Australia, and the Philippines simultaneously, Beijing deems each development as a coordinated architecture of containment. American Freedom of Navigation Operations in the South China Sea, joint naval drills in the Philippine Sea, arms sales to regional partners and lifted embargoes on longtime rivals like Vietnam, are all actions that are confirmations for Beijing of a threat that Chinese strategists have long anticipated.

MANILA’S ASSERTIVE STANCE IS NOT NEW

The recent assertive stance taken by Manila is not new but rather an event in a long trend which started under President Ferdinand Marcos Jr. in June 2022, who rejected the conciliatory stance towards China, adopted by his predecessor, Rodrigo Duterte. 

The Philippines since then has signed expanded military access agreements with the United States, deepened ties with Japan, and more recently inked a visiting forces agreement with France. 

Building alliances to curb China’s growing influence in the region, along with its establishment of a Permanent Coast Guard, signals a resolute Philippines unwilling to bend in the face of a formidable neighbour. With the international order in disarray right now, perhaps this is the best strategy the smaller nations of the international power configuration can undertake to protect their sovereignty, one which allows them to actively defend their independence and ensures their sovereignty remains intact.