China SLBM Test Reveals Push for Continuous Sea Deterrence
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- China's PLA Navy launched an SLBM at 12:01 p.m. Beijing time on July 6 from a strategic nuclear submarine, with the missile traveling about 7,300 kilometers from the South China Sea toward designated Pacific waters.
- The warhead landed outside Japan's exclusive economic zone but inside the South Pacific Nuclear Free Zone established by the Treaty of Rarotonga, prompting concern from Japan, Australia, New Zealand, the United States, and Pacific Island nations.
- Analysts Étienne Marcuz (Fondation pour la Recherche Stratégique) and independent Australian naval analyst Alex Luck assess the test as evidence China is transitioning toward a Continuous At-Sea Deterrence (CASD) posture like those maintained by the US, UK, and France.
- Both analysts point to a JL-2 missile launched from a Type 094A SSBN as the most likely configuration, ruling out the newer JL-3 and Type 096 submarine due to a lack of indicators that either has entered service.
- China notified select governments in advance, but the process was ad hoc rather than institutionalized; Beijing has not joined the Hague Code of Conduct against Ballistic Missile Proliferation, and Luck argues engagement should focus on formalizing routine notification procedures.
- New Zealand Foreign Minister Winston Peters called the launch inconsistent with the spirit of the Treaty of Rarotonga, and Marcuz noted navigational warnings suggested China may have originally planned more than one launch, with only the South China Sea shot appearing to occur.
Why it matters: Only four nuclear powers — the US, Russia, the UK, and France — currently operate sustained sea-based deterrents, and Beijing's apparent move toward joining that club reframes Indo-Pacific missile defense planning for Japan, Australia, and the US Pacific fleet. With Beijing outside the Hague Code of Conduct and notification standards remaining ad hoc, routine overwater SLBM tests look set to become a recurring diplomatic irritant rather than a one-off event.
