Yu-6 heavyweight torpedo
Overview
The Yu-6 is the PLA Navy's standard heavyweight submarine-launched torpedo — China's rough equivalent of the U.S. Mark 48 ADCAP and the weapon that gives its modern attack submarines their offensive punch against ships and other submarines. Reverse-engineering and indigenous development drew on Western and Russian torpedo lineages to produce a 533 mm wire-guided weapon with acoustic and wake-homing capability. Like its Western counterparts, the Yu-6 is wire-guided from the launching submarine for most of its run — letting the boat's sonar and fire-control steer the weapon and update the target solution — before its own active/passive sonar seeker (with a wake-homing mode useful against surface ships) takes over for terminal homing. It is propelled by an Otto-fuel piston engine to ranges of roughly 45 km and speeds in excess of 60 knots, and arms the Type 093 nuclear attack submarines and the Yuan/Song/Kilo conventional boats. For an analyst, the Yu-6 represents China's effort to match Western undersea lethality — the area where the U.S. and its allies have long held a decisive advantage. Its real-world performance and quietness are unproven against a peer, but its existence means PLAN submarines are no longer armed with obsolete Cold-War-era weapons, narrowing one of the last clear Western edges in the Pacific.
Deployment Map
Home ports from known hull assignments. Operating areas reflect typical AORs — individual deployments will vary.
Timeline
Specifications
Doctrine & Employment
Role
Standard PLAN submarine-launched heavyweight torpedo for anti-submarine and anti-ship attack.
Design Philosophy
Match Western undersea lethality with an indigenous heavyweight weapon.
Employment
Wire-guided from the launching submarine, then acoustic/wake terminal homing.
Threat Context
Narrows the U.S./allied advantage in undersea warfare in the Pacific.
How to Compare
Read against the Mk 48 ADCAP, Japan's Type 89 and Britain's Spearfish.
Operational Patterns
Typical Deployment
Anti-submarine and anti-surface engagements from PLAN attack and conventional submarines.
Typical Task Group
Type 093 SSNs and Yuan/Song/Kilo SSKs.
Readiness
Standard fleet torpedo; successors emerging.
Key Operating Areas
Peer Comparison Matrix
The Mk 48 is combat-mature with the CBASS broadband sonar; the Yu-6 is China's analogue, narrowing a long-standing U.S. undersea edge.
Video angle: US vs Chinese submarine torpedoes.
Japan's domestic heavyweight torpedo of similar class.
Video angle: East Asia's submarine torpedoes.
The Royal Navy's faster heavyweight torpedo.
Video angle: The world's heavyweight torpedoes ranked.
Combat History
No combat use; standard armament of PLAN submarines, exercised regularly.
Capability assessed from fielding, not war.
Known Vulnerabilities
Unproven seeker performance
Acoustic discrimination against modern countermeasures is untested in combat.
Context: Western boats deploy capable decoys and jammers.
Mitigation: Continued development and successors.
Wire-guidance constraint
Best performance depends on the guidance wire, limiting host-submarine manoeuvre.
Context: Wire can break, dropping to autonomous homing.
Mitigation: Autonomous seeker fallback.
Variants
| Variant | Designation | Years | Count | Status | Key Changes |
|---|---|---|---|---|---|
| Yu-6 | — | 2005– | — | active | Standard heavyweight wire-guided torpedo |
| Yu-9 / follow-ons | — | 2010s | — | active | Improved acoustic homing successors |
Modernization Programmes
Acoustic & quieting upgrades
Improved seekers and successors (Yu-9 class) for the expanding submarine fleet.
Impact: Closes the gap with Western heavyweight torpedoes.
Images
Frequently Asked
When was the first Yu-6 heavyweight torpedo commissioned?
The first Yu-6 heavyweight torpedo entered service in 2005.
Who builds the Yu-6 heavyweight torpedo?
The Yu-6 heavyweight torpedo is built by China State Shipbuilding (705 Research Institute).
What variants of the Yu-6 heavyweight torpedo exist?
Known variants include: Yu-6, Yu-9 / follow-ons.
Curated Research
recommended
Open-source undersea-weapon analysis
reference
Class and platforms
Watch Yu-6 heavyweight torpedo in Action
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