Indo-Pacific — 2026-06-13

PRC Vessels Enter Taiwan-Controlled Itu Aba Restricted Waters for First Recorded Time

BLUFBeijing will likely repeat Itu Aba incursions before mid-September, opening a third concurrent gray-zone front that forces Taiwan's Coast Guard into an unsustainable multi-theater patrol posture.

Taiwan's Coast Guard Administration (CGA) reported that Chinese patrol vessel Sansha Zhifa 301 and supply ship Sansha 2 entered Itu Aba's restricted waters twice on Thursday morning, at 8:28 and 8:31 a.m., and were expelled by 8:43 a.m. 12. Taiwan News reported the vessels crossed into a prohibited-waters sub-zone within the outer restricted area at 8:31 a.m., a distinction absent from Focus Taiwan and Taipei Times accounts 3. The CGA said the ships twice made sharp course changes that endangered Taiwanese personnel, characterized the episode as the first recorded Chinese official vessel entry into Itu Aba's restricted waters, and issued its "strongest condemnation" 13. Beijing has characterized the broader operation as a response to Japan-Philippines maritime boundary talks east of Taiwan 12.

Analysis
PRC official vessels will likely enter Itu Aba's restricted waters again before September 11, 2026, opening a second sustained gray-zone theater for Taiwan's Coast Guard alongside the Pratas and east-of-Taiwan fronts already active. High analytic confidence rests on Beijing's established recurrence pattern: probe entries at Pratas and east of Taiwan have each preceded repeated operational returns. Beijing's framing of the June 11 incursions as law enforcement in response to Japan-Philippines boundary talks provides a standing doctrinal pretext for future entries independent of any particular diplomatic trigger. The concurrent personal sanction against Philippine Defense Secretary Teodoro over the same partnership talks pairs maritime probing with diplomatic coercion across two theaters. Taipei must now sustain a permanent CGA patrol posture 1,600 km from Kaohsiung at a garrison of 200 personnel, a force commitment that strains availability across multiple theaters.
4 sources
  1. Coast guard expels Chinese vessels from Taiping Island restricted waters - Focus Taiwan (CNA)
  2. Coast guard expels Chinese vessels from Itu Aba restricted waters - Taipei Times
  3. Chinese government vessels enter prohibited waters of Taiwan's Taiping Island for first time - Taiwan News
  4. Taiwan Condemns China After Chinese Vessels Enter Restricted Waters - NewsX

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