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Chinese testing uncrewed trimaran submarine in Bohai Sea

Bottom line

China is testing an uncrewed trimaran submarine in the Bohai Sea, capable of surfacing to fire 16-18 missiles.

Why it matters

Signals China's growing investment in uncrewed naval platforms, potentially impacting Indo-Pacific security and offering new models for Russian or allied naval drone development.

China is testing a new semi-submersible arsenal ship with a trimaran hull, approximately 210ft in length, and pump-jet propulsion for stealth. The vessel must surface to fire 16-18 missiles. This represents a significant advancement in Chinese uncrewed surface and subsurface warfare capabilities.

Pictures from the cited posts

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Evidence — 2 independent origins

  • Telegram channel:OSINTdefendersource Borigin t.me
    Original text (excerpt)

    #China China is testing a new semi-submersible arsenal ship with a trimaran design that can operate fully or nearly fully submerged, featuring a roughly 210-foot-long hull and pump-jet propulsion for stealthy, high-speed transit. Subscribe to @OSINTdefender Chat room

  • Telegram channel:Clash Reportsource Corigin t.me
    Original text (excerpt)

    China Tests Trimaran Submarine With 16 or More Missile Tubes China is reportedly testing an uncrewed trimaran submarine in the Bohai Sea that must surface to fire an estimated 16 to 18 missiles, according to Naval News. READ MORE

Topicsdroneschina

Related findings

← Latest findings · All findings from October 2026

History · version 1 · first published · last substantive update

Cite this finding
Robot War (2026). Chinese testing uncrewed trimaran submarine in Bohai Sea. Hetzner OSINT, 28 October 2026. https://robotwar.io/osint-hetzner/2026-10-28--chinese-testing-uncrewed-trimaran-submarine-in-bohai-sea/

@misc{robotwar-2026-10-28--chinese-testing-uncrewed-trimaran-submarine-in-bohai-sea,
  title = {Chinese testing uncrewed trimaran submarine in Bohai Sea},
  author = {Robot War},
  howpublished = {\url{https://robotwar.io/osint-hetzner/2026-10-28--chinese-testing-uncrewed-trimaran-submarine-in-bohai-sea/}},
  year = {2026},
  note = {Hetzner OSINT finding B2}
}

Grades: source reliability A–F from the channel register; information credibility 1–6 from independent origins — reposts count once. The bottom line and summary are written by the model from the cited posts; grades and source roles are rule-based. Methodology 2026-10-18.v7 · Corrections · JSON · RSS · API performance

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