China’s newest attack submarines are forcing a long-running debate about whether Beijing is finally closing the undersea gap, or just building more boats faster.
Quick Take
- Open-source reporting says China launched nine Type 093B nuclear attack submarines between 2022 and 2026, a pace that outstrips recent United States production.
- Some analysts say the Type 093B brings pump-jet propulsion and a vertical launch system, which would improve stealth and strike reach.
- Other assessments say the boat’s “hump” likely holds a passive towed array sonar, not missile tubes, and that missile launch claims are overstated.
- Even with newer nuclear boats, China’s diesel-electric fleet still remains the core of its submarine force.
China’s Production Surge
Breaking Defense reported in February that an International Institute for Strategic Studies review found China launched more nuclear submarines than the United States in the 2021 to 2025 period. The same report said Chinese shipyards launched ten nuclear submarines totaling 79,000 tonnes, compared with seven American submarines totaling 55,000 tonnes. That production gap matters because submarine power is not just about design. It is also about how fast a navy can put hulls in the water and train crews.
The scale of the buildup has led some observers to treat the Type 093B as a real step forward, not just a symbol of industrial capacity. A June 2025 YouTube analysis described the class as the most capable nuclear-powered attack submarine in active Chinese service and said it reflects efforts to reduce acoustic signature, add firepower, and improve mission flexibility. Still, that view rests on secondary analysis, not direct Chinese disclosure, so the real performance ceiling remains uncertain.
What The Boat May Actually Carry
Several sources say the Type 093B has pump-jet propulsion, which can reduce cavitation noise compared with an exposed propeller. Some also say the class includes a 24-cell vertical launch system and can carry cruise missiles such as the YJ-18. If true, that would give China a quieter attack submarine with more strike options than earlier Shang-class boats. That is why the class has drawn so much attention from Western analysts and naval watchers alike.
But the strongest rebuttal comes from a detailed Admiralty Trilogy assessment, which argues the hump on the Type 093B is more likely for a passive towed array sonar than a vertical launch system. That same assessment says the submarine’s anti-ship missile role is more likely limited to torpedo tube-launched weapons. This counter-claim does not erase the production data, but it does weaken the more dramatic claims about hidden missile capacity and a big leap in undersea strike power.
Why The Debate Keeps Coming Back
China’s submarine story keeps following the same pattern: more hulls, better shapes, and constant argument over how much real combat power follows. The Navy Times-style debate is familiar because the United States still leads in quieting, sensor quality, and crew experience, while China keeps narrowing some gaps through shipyard expansion and modernization. The Institute for National Security and Technology report also notes that China’s diesel-electric fleet remains the backbone of its submarine force.
That mix of progress and limits helps explain the bigger picture. China may be improving faster than many once expected, but open-source estimates still differ on how many Type 093B submarines are truly operational, and what they can really do. For readers on either side of the political divide, the lesson is similar: military power is often messier than the headlines suggest, and both overstatement and complacency can cloud the public view of a major strategic shift.
Sources:
19fortyfive.com, defencesecurityasia.com, youtube.com, breakingdefense.com, reddit.com
