Natuna waters put ASEAN's maritime unity to the test

Detailed summary

To protect its own waters from Beijing's creeping maritime pressure, Indonesia must trade cautious bilateralism for region-wide solidarity at the upcoming ASEAN Summit in Manila.

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To protect its own waters from Beijing's creeping maritime pressure, Indonesia must trade cautious bilateralism for region-wide solidarity at the upcoming ASEAN Summit in Manila.

hen Southeast Asian leaders convene in Manila on Nov. 16-18 for the 49th ASEAN Summit, the South China Sea will once again dominate the agenda. Much of the focus will inevitably center on the host nation, the Philippines, whose coast guard has repeatedly engaged in high-stakes standoffs with Chinese vessels at Second Thomas Shoal and Scarborough Shoal.

Yet evidence indicates that Chinese maritime incursions around Indonesia’s Natuna Islands have persisted into 2026, though recent episodes have garnered scant public attention. This continuing friction highlights a vital reality: Maritime unity within ASEAN is equally critical for Jakarta.

Indonesia has long maintained that it is not a claimant state in the South China Sea dispute, asserting that no overlapping territorial claims exist between Jakarta and Beijing. Under the 1982 United Nations Convention on the Law of the Sea (UNCLOS), the North Natuna Sea falls squarely within Indonesia’s exclusive economic zone (EEZ).

Nevertheless, China Coast Guard (CCG) cutters and maritime research vessels have systematically operated for years within the portion of Indonesia’s EEZ intercepted by Beijing’s unilateral "nine-dash line”.

In October 2024, just one day after President Prabowo Subianto assumed office, CCG 5402 disrupted a seismic survey vessel operating on behalf of state-owned energy company Pertamina. Indonesian maritime patrols expelled the ship twice within a single week. In mid-2025, the Indonesia Ocean Justice Initiative documented recurring unauthorized operations by Chinese research ship Nan Feng alongside CCG escorts.

Beijing routinely dismisses criticism of…

Opening of the article, excerpted from The Jakarta Post. To read the rest, open the article on the publisher's site.