Operational failure

Submarine Cable

Taiwan–Matsu cables No. 2 and No. 3 — dual vessel damage isolates islands

2 and 8 February 2023

Matsu Islands and Taiwan, Taiwan Strait

  • Undersea cable severance

26.1500, 119.9500

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What happened

The Taiwan–Matsu No. 2 cable was severed on 2 February and the No. 3 cable on 8 February, leaving the Matsu Islands without their two normal submarine links to Taiwan. Taiwan's National Communications Commission associated the first break with a Chinese fishing vessel and the second with a cargo ship, while backup microwave links provided constrained connectivity to roughly 14,000 residents. A repair vessel restored normal communications by the end of March. Authorities did not establish deliberate damage or Chinese government direction, so this is recorded as vessel-caused cable damage with hybrid-warfare relevance, not as a confirmed state sabotage operation.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.

Evidence
Documented
Confidence
High
Infrastructure
Submarine Cable
Current temperature
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Latitude
26.1500°
Longitude
119.9500°

Attribution

Responsibility disputed Chinese fishing vessel and cargo ship linked to the two cable breaks; intent not established

Taiwan's National Communications Commission linked the breaks to vessels, but Taiwan did not establish Chinese state direction or deliberate sabotage.

Sources

  1. Taiwan suspects Chinese ships cut islands' internet cablesAssociated Press · Incident reporting
  2. Taiwan–Matsu undersea cable outage and consumer protectionTaiwan National Communications Commission · Official cable, backup-capacity and restoration chronology