🇨🇳 China
South China Sea · Naval Base
Yulin Naval Base in China sits along the most heavily contested waters on Earth. More than one-third of global shipping — roughly $3.4 trillion in annual trade — passes through the South China Sea, with overlapping territorial claims from China, Vietnam, the Philippines, Malaysia, Brunei, and Taiwan. China's artificial-island construction in the Spratly and Paracel archipelagos has expanded the operational reach of its coast guard and maritime militia, both of which have been documented harassing commercial vessels near disputed features. Piracy and armed robbery persist in the southern reaches, particularly between Malaysia, Indonesia, and the Philippines. Typhoon season (June–November) adds significant schedule and fuel uncertainty for voyages routed through the region.
No port-call data observed at Yulin Naval Base in the last 180 days. ArcNautical's AIS coverage focuses on the world's commercial shipping lanes; smaller or specialised ports may not register sufficient traffic for a meaningful breakdown.
Yulin Naval Base falls under the Tokyo MoU. The Tokyo Memorandum of Understanding (Asia-Pacific) maintains the most active publicly-available regional PSC programme. Across the last 24 months, the Tokyo MoU detention dataset records 5,331 distinct vessel detentions (sourced from OpenSanctions, as of 2026-06-14). Vessel-level detention probability is computed by ArcNautical using flag performance, vessel age, deficiency history, and ownership opacity.
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