New Large Chinese Submarine With Very Unique Feature Just Caught On Satellite Imagery
The nuclear fast attack-sized mystery submarine could be China's answer to a high-speed interceptor boat.
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A new type of submarine that appears to lack a traditional sail has emerged in China. The same shipyard launched a smaller ‘sailless’ submarine — a technology demonstrator — eight years ago. More recently, a top Chinese shipbuilding conglomerate put forward a concept for an uncrewed underwater vehicle (UUV) with a broadly comparable hullform. Designs of this kind can offer benefits in terms of speed, maneuverability, and reduced acoustic signature, but also have major drawbacks.
TWZ has obtained imagery of the submarine in question at JN (Jiangnan) Shipyard in Shanghai on June 1, as seen at the top of this story and below, from Vantor (previously Maxar Technologies). The boat, the name and/or designation of which are currently unknown, first appeared there sometime at the end of May, according to Naval News. That outlet was first to report on this development.
From the imagery, the submarine does not have a traditional sail. However, the exact shaping of what is present is also not entirely clear from the view that is currently available. As noted, JN Shipyard is known to have built at least one other ‘sailless’ submarine in the past, which we will come back to later on.
A picture of the low-profile submarine that JN Shipyard launched in 2018. Chinese internet
Writing for Naval News, undersea warfare analyst H.I. Sutton has assessed the design to be roughly 394 feet (120 meters) long and to be between 33 and 36 feet (10 and 11 meters) wide. What its intended missions might be are unknown, but this is certainly larger than common diesel-electric submarines (SSK) and even longer than most nuclear fast attack submarines. For comparison, variants of China’s Type 093 nuclear-powered attack submarine (SSN), some of the most modern submarines in People’s Liberation Army Navy (PLAN) service today, are approximately 356 to 360 feet (108 to 110 meters long) and 36 feet wide. The official stated length and width of the U.S. Navy’s Virginia class SSNs, across all existing subvariants, are 377 feet (114.8 meters) and 34 feet (10.36 meters), respectively.
An X-shaped stern is a feature now further associated with a next-generation Chinese attack submarine design commonly, but still unofficially, referred to as the Type 095. Naval News also reported today on the recent launch of what may be another Type 095, which has a traditional sail, at the Bohai Shipyard in Huludao, hundreds of miles to the north of Shanghai. This appears to have caused some confusion online, with some mistaking the boat at Bohai for the ‘sailless’ type.
Just translated via @type36512: CSSC Bohai Shipbuilding: Launch of a New Submarine
Satellite imagery captured on May 29. I believe this image depicts the new 120m-class, sail-less submarine discussed in the accompanying article. However – due to limitations in image resolution – https://t.co/sHF9Y8gkGe
Even if we scale 09V's hull diameter with this mystery submarine (for illustration purposes), it is a fair bit shorter, meaning it probably isn't a 09V, but it also doesn't correspond to what a 10m diameter, 120m length submarine would look like…
The newly emerged submarine at JN Shipyard may also have a shrouded propulsor, which could be a pumpjet type. Pumpjets offer further benefits for quieter operation, especially at higher submerged speeds.
The absence of a traditional sail is still the most notable aspect of the new submarine at JN Shipyard. Omitting a large structure sticking out of the top of the hull helps significantly with streamlining the overall design. Eliminating that drag can allow greater optimization for speed and maneuverability while submerged. It can also help make the submarine quieter and, by extension, harder to detect, even while transiting through an area at higher speeds. This can be especially useful when racing out to threats, even those far away.
Not having a traditional sail could impose certain design constraints. Traditionally, naval submarines have used their sails to mount periscopes and other sensor masts, as well as extendable communication antennas and snorkels to help cycle air without fully resurfacing. That is space that can be used for other purposes, including launchers for countermeasures and general storage.
A generic example of the array of masts that extend up from the sails of modern naval submarines. Hensoldt
Above all else, while running on the surface, the sail is key for general navigation and situational awareness. It can also provide an elevated position for local force protection or supporting vertical replenishment (VERTREP) operations. If sufficiently hardened, it can even break through feet of ice during operations in and around the polar regions.
The sail of the US Navy’s Los Angeles class attack submarine USS Santa Fe seen broken through the ice during an exercise in the Arctic Circle in March 2026. USN/Petty Officer 1st Class Jacob Bergh
The lack of a sail might reflect a focus on seabed operations far from the surface where mast deployment and other considerations might be less pressing. At the same time, the design’s features could just as easily be centered on improving performance, including the ability to make transits as quickly as possible during blue water operations. It could also offer benefits for shallow-water operations, though we have noted that, overall, it is very large compared to SSKs.
As mentioned, a smaller ‘sailless’ submarine had already emerged at JN Shipyard in 2018. H.I. Sutton previously estimated that design to be around 150 feet (45 meters) long and 15 feet (four to four-and-a-half meters) wide. That submarine also had a non-X-shaped rudder arrangement and what appeared to be an unshrouded propeller. The exact reasons for building that boat and how it has been utilized over the years remain unknown, but it would have at least provided a testbed and technology demonstration platform to explore this design concept, and potentially other capabilities. Whether it was designed for crewed or uncrewed operation, or to be optionally crewed, is not clear, either. The same is true of this new submarine, though it seems unlikely it is uncrewed.
A top-down look at the first low-profile submarine to emerge from JN Shipyard. Chinese Internet
At the Zhuhai Airshow in 2024, the state-run China State Shipbuilding Corporation (CSSC) did show a model of an unprecedentedly large, diesel-electric UUV. Its overall design was highly reminiscent, at least in broad strokes, of JN Shipyard’s original ‘sailless’ submarine, as TWZ noted at the time. JN Shipyard is one of many subsidiaries of CSSC.
CSSC said at the time that the drone submarine could be configured to perform a wide array of missions, including launching attacks on enemy vessels, laying mines, supporting special operations forces, and serving as a mothership for smaller uncrewed underwater vehicles (UUV). You can read more about all of this here.
The model of the low-profile UUV design CSSC showed at the Zhuhai Airshow in 2024. Chinese internet
Other shipyards and navies around the world have explored low-profile submarine designs in the past, but designs have generally been consigned to the world of paper concepts and limited experimentation. The U.S. Navy, for instance, previously tested a Large Scale Vehicle Range (LSVR) subscale demonstrator submarine with a novel sail structure. The Navy’s Acoustic Research Detachment (ARD) conducted that work in a lake in Bayview, Idaho.
Large Scale Vehicle Range (LSVR) subscale demonstrator submarine seen sailing in Lake Pend Oreille in Idaho. Public Domain
A model of a low-profile ballistic missile submarine concept called Arktur shown in Russia in 2022. @MuxelAero
In 2021, the Navy also notably put out a contracting notice calling for concepts for inflatable sail structures, which could combine the benefits of traditional sails and low-profile designs. What degree of work the service may have conducted since then on this Inflatable Deployable Sail System (IDSS) is unclear, but it underscores how important a sail is for general operations on the surface.
Greater use of nuclear propulsion promises to extend the reach of Chinese submarines in the Pacific and beyond, and is clearly part of the PLAN’s larger vision for naval power projection going forward.
“The PLA Navy is executing a significant strategic shift from diesel-electric to all-nuclear construction, representing a fundamental departure from historical construction patterns,” U.S. Navy Rear Adm. Mike Brookes, head of the Office of Naval Intelligence, wrote in prepared remarks ahead of a hearing before members of the U.S.-China Economic and Security Review Commission in March.
Brookes also highlighted how the hybrid Type 041, specifically, could offer “greater endurance, potentially filling regional patrol and presence missions more economically than full-size SSNs [attack submarines] and SSGN [guided missile submarines.”
More remains to be learned about the newly emerged submarine at JN Shipyard, but it could point to new low-profile designs without traditional sails, possibly to act as the PLAN’s underwater high-speed interceptor, being part of China’s larger future submarine future.
