Full Breakdown
China Tests Uncrewed Trimaran Submersible Warship with 16 Missile Tubes
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In this breakdown
01
New Trimaran Submersible Warship Unveiled
China is conducting sea trials of a trimaran-hull vessel that combines submergence with surface-launch capability. The craft, observed in the Bohai Sea near Huludao, was built in Guangzhou and moved north via Dalian earlier in 2026. A satellite image captured at Dalian on May 12, 2026 shows the hull on the pier before its move to the test site.
02
Design and Capabilities
The three-hull configuration provides enhanced stability while surfaced, and a prominent snorkel mast suggests diesel propulsion can be used when submerged. Two large hangar bays are integrated into the central hull; analysts estimate each bay houses a circular cluster of missile tubes, with at least eight tubes present and a likely total of 16-18 based on hangar size. When the ship surfaces, the hangar doors open and the tubes are raised to a vertical firing position, allowing launch of strike-length missiles such as the YJ-20 hypersonic missile, which can engage sea-borne and land targets at ranges exceeding 1,500 km (930 mi).
The trimaran’s outriggers appear to carry ducted propellers, possibly pump-jet types, while the main hull likely uses conventional diesel-driven screws or water jets. The missile hangars occupy most of the internal volume, leaving limited space for crew accommodations. Dr. Pawling notes the cramped interior makes a permanent crew improbable; the open navigation bridge atop the sail is probably intended for brief human control during port entry and exit.
03
Operational Concept
The craft is described as a “submersible warship” that remains uncrewed for most of its mission but must surface to launch its payload. Its design echoes Cold-War-era Soviet Juliett-class cruise-missile submarines, which also required surfacing for missile deployment. Modern missiles, however, provide longer reach and dual-target capability, turning the vessel into a mobile launch platform within a distributed strike network rather than a stand-alone combatant.
04
Expert Assessment
Dr. Pawling compares the trimaran to the Juliett class, emphasizing that the Chinese version can carry far more weapons—potentially four times the missile load of the Soviet predecessor. He also points out that the vessel’s reliance on external targeting data aligns it with a networked warfare concept, where the platform functions primarily as a transporter and launcher for missiles launched from a distance.
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Uncertainties and Gaps
- Missile-tube count: Satellite imagery confirms two hangars, but the exact number of tubes remains unverified; estimates range from eight to as many as 18.
- Crew presence: The size of the internal compartments suggests little room for a crew, yet the bridge indicates occasional human oversight. No official crew complement has been disclosed.
- Designation and program affiliation: The craft has not received an official Chinese designation or a Western reporting name, and its observed ports differ from those used by China’s known uncrewed surface vessel (USV) and uncrewed submarine (XLUUV) programs, leaving its exact program lineage unclear.
06
Potential Strategic Implications
If operational, the trimaran could extend China’s anti-access/area-denial (A2AD) envelope by allowing rapid, covert positioning of long-range missiles within striking distance of carrier battle groups. Its uncrewed nature reduces personnel risk and may simplify deployment in contested waters. The requirement to surface for launch could expose the vessel to detection and counter-measure actions, especially in high-traffic maritime zones.
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What Remains to Be Seen
China has not provided public commentary on the platform, and further testing will be needed to confirm launch procedures, survivability, and integration into existing command-and-control networks. Observers will watch for additional satellite imagery or open-source disclosures that clarify the vessel’s final configuration and intended operational role.