The U.S. Navy has given us the first look at Blackbeard hypersonic strike missiles under the wings of F/A-18E/F Super Hornets during actual flight testing. The Navy is hoping to have Blackbeard in at least limited service no later than 2028, giving its carrier air wings an all-new fast-flying standoff weapon, particularly for engaging enemy ships. The missile is also being designed to be relatively cheap and quick to manufacture.
The Navy’s Office of the Portfolio Acquisition Executive for Aviation (PAE-A) has released a video montage of Blackbeard undergoing flight testing, seen in the social media post below. The service confirmed that it had at least begun test-loading the missiles onto F/A-18E/F Super Hornets in a presentation at the Tailhook Association’s annual convention last month. Now we know the program has moved ahead substantially from that point.
The company behind Blackbeard, defense start-up Castelion, has received several multi-million-dollar contracts from the Navy just this year explicitly to support integration of the weapon onto the Super Hornet, as well as otherwise accelerating its development. In its daily contracting on September 14, the Pentagon announced the Navy had struck yet another deal with Castelion, valued at $43.65 million, “for the manufacturing, assembly, testing, and delivery of the first production lot of 444 All-Up Rounds (AURs), defined as fully functional tactical missiles packaged within specialized shipping and storage containers.”
A screen capture from the Blackbeard flight testing video montage the Navy released today. USN capture
In terms of what we know today about Blackbeard’s design and capabilities, as we have previously written:
“A profile photo [seen below] at the company’s headquarters reveals a weapon with a ballistic missile-like booster, on top of which is mounted what could be an unpowered hypersonic glide vehicle (HGV). A booster brings an HGV to the desired velocity and altitude before releasing it toward its target. The concept is in contrast to air-breathing cruise missiles capable of traveling at hypersonic speeds. Hypersonic speed is generally defined as anything above Mach 5, which larger ballistic missiles also reach in the course of their flights. More precise performance figures for Blackbeard are lacking, but Castelion has previously hinted it could hit targets out to just under 500 miles. Alternatively, the second stage may also have its own motor, allowing it to continue accelerating or sustain high-speed flight. A similar arrangement has been suggested as the propulsion system for the Russian Zircon missile.”
Castelion
“Both stages of the weapon have cruciform fins, while the upper one features a prominent ‘chine’ line along the length of its body, and a slightly beaklike nose. The trolley on which the weapon is mounted provides some idea of its overall size. The blue stripes seen on each stage normally signify that a munition is an inert, non-explosive round utilized for training or tracking purposes. This would indicate a real (unarmed) missile rather than a dummy or mockup.”
A picture shown at Tailhook had also offered a new look at the front of the missile, exposing what looked to be an aperture on one side of the design’s wedge-shaped nose. As we wrote after that image emerged:
“The apparent apertures are also seen pointed up, but many air-launched munitions do flip down after release.”
“How exactly Blackbeard is guided remains unknown, but a downward-angled aperture at the nose end for a seeker system would make sense for this weapon, which the Navy is pursuing primarily as a new way to target enemy ships. In particular, a wide array of existing anti-ship and land attack missiles, as well as certain anti-air types, have variously shaped apertures in their noses for imaging infrared seekers. Imaging infrared has the benefit of being immune to radio frequency electronic warfare jamming. In addition, it is a passive capability that does not send out signals that can give an opponent advance notice of an incoming attack. Blackbeard’s full guidance package very likely also includes some means of navigating to a target area first, and it could have multiple modes of operation.”
The new flight testing footage released today also underscores the relatively small size of Blackbeard overall. While the Super Hornet is set to be the first operational launch platform, it is very likely to be integrated on other aircraft quickly thereafter. The Navy is acquiring Blackbeard under a program called the Multi-mission Affordable Capacity Effector (MACE).
Another screen capture from the new Navy video offering a different of Blackbeards under the wings of a Super Hornet, underscoring their relatively small size. USN capture
Requirements for MACE that the Navy put out previously explicitly called for a design compact enough for carrier-based F-35C (and land-based F-35A) Joint Strike Fighters to carry four of them internally. Whether that remains a goal in any way is unclear. Still, being able to carry some number of Blackbeards internally would not only give those jets a hypersonic strike weapon, but one that they could carry in the most stealthy configuration. The Navy also notably does operate the F-35A outside of the test and evaluation community, which might point to air-launched Blackbeards entering service elsewhere in the future. As an aside, the U.S. Army is pursuing a ground-launched version of this missile, as well.
As mentioned, the Navy’s stated goal now is to reach an early operational capability with Blackbeard by 2028, if not sooner. What the exact fielding plan for those missiles might be is unclear. PAE-A did write “Coming soon to a theater near you” in its post on X containing the video montage, and tagged the official accounts for U.S. Central Command (CENTCOM) and U.S. Pacific Command (PACOM). CENTCOM oversees U.S. military activities in and around the Middle East, including ongoing operations against Iran. U.S. military officials have also long touted hypersonic weapons, in general, as key to success in any future conflict in the Pacific, especially a high-end fight against China.
For the past six months or so, a curious-looking vessel with a very boxy superstructure has been taking shape at a shipyard in the Chinese city of Shanghai. A new satellite image lends credence to an earlier assessment that this is a mothership to support China’s growing fleets of ever-larger submersible drones, though it could also have other roles.
TWZ obtained the image of the ship in question, which was taken on September 10, from Vantor. Since then, it has also received an overall coat of gray paint, pointing to future service with the People’s Liberation Army Navy (PLAN). It is some 669 feet (204 meters) long and around 98 feet (30 meters) at its widest. In terms of basic length and width, the vessel being built now is very roughly comparable to China’s Type 071 amphibious warfare ship. However, it appears to be much taller overall than the Type 071.
The new ship has been under construction at the Hudong-Zhonghua Shipyard on Changxing Island in Shanghai since at least April. This yard produces a variety of naval vessels, including surface combatants and amphibious assault ships, as well as commercial designs.
The September 10 image, which shows the ship from the stern, is interesting for a number of reasons. It notably confirms that the design not only has a well deck, but that it is sized around what looks to be a large cradle-like platform visible in the shot. The very roughly 164-feet (50-meter) long rectangular platform has an arch-shaped structure at one end and two teardrop-shaped ones at the other, as well as six pillars, three on each side, in between. The teardrop-shaped structures, in particular, point to the platform being at least a semi-submersible, as they would help with stability and otherwise guide the flow of water while being pulled along.
The satellite image also clearly shows six large struts extending from the top of the stern end of the superstructure, each one which is paired with a shorter strut, for a total of 12. Earlier this month, independent naval analyst H.I. Sutton, who tracks undersea warfare developments in particular, posited that these struts could be used to lower a platform or some other similar structure below the hull of the ship. He also assessed that they could be used as part of a larger system capable of moving payloads between decks internally. This would help account for the configuration of the core superstructure, especially how high it is all the way from the front to the back. Overall, signs point to the inside of the superstructure being largely hangars and other open work spaces, allowing for multiple large UUVs to be carried and supported. Individual UUVs would be launched and recovered, one at a time, via the cradle.
In making his assessment, Sutton drew specific attention to a previously shown rendering of a proposed Chinese scientific research vessel with a roughly similar strut-based system at the stern for deploying submersibles and other large payloads. However, on that design, the system was entirely exposed rather than contained with an extended superstructure.
The rendering of the proposed scientific research vessel with a system for deploying payloads at the stern that features four struts. Chinese internet via H.I. Sutton
The platform seen immediately behind the ship being built at the Hudong-Zhonghua Shipyard aligns with Sutton’s assessment about the purpose of the struts. At the same time, launches and recoveries could also be conducted in a more traditional manner via the well deck. The design of the cradle-like platform would seem to suggest the latter option is at least part of the plan.
The image from September 10, as well as other recent views of the ship, highlight other features that are now taking shape. This includes a large opening on the starboard side, which could be for launching and/or recovering lifeboats or other watercraft, or moving payloads to and from the pier while docked, as well as a multi-pronged mast on top of the bridge. An additional part of the ship’s superstructure extends behind the bridge area, and there is what looks to be a hangar inside. There is no attached helipad present now, but one could well be added later on somewhere on top of the superstructure. Many naval auxiliaries, as well as commercial ships designed for offshore support and other specialized tasks, have open helipads on raised frames attached to different parts of the superstructures.
Though there is growing clarity about the ship’s design, many questions do remain about the full breadth of its intended purpose. In Sutton’s view, the PLAN has a need, just in general, for a dedicated mothership to support its growing uncrewed underwater vehicle (UUV) fleets. The PLAN is pursuing various tiers of UUVs to perform a host of different missions, including intelligence, surveillance, and reconnaissance (ISR), as well as mine-laying, special operations support, and even launching direct attacks on enemy vessels. Larger and larger UUV designs have been steadily emerging in China, which could require more specialized launch and recovery options to be feasibly employed operationally, especially from other vessels at sea. Deployment and retrieval at sea could, in turn, support very long duration missions far from China’s own shores.
“With smaller UUVs, even up to 20 meters like the AJX-002 and HSU-100 paraded in Beijing last year, they are road mobile. Truck mounted cranes should be sufficient for getting them in and out of the water making operations much simpler. With these latest, much larger XXLUUVs [extra-extra large uncrewed underwater vehicles] however, China will start to need dedicated port facilities,” Sutton wrote previously on his website. “Until now China has been using floating docks to house the two XXLUUV prototypes being tested on Hainan. One of these docks was purpose built while the other may have been taken up from general use.”
A Chinese AJX-002 UUV, or a mockup thereof, seen ahead of a major military parade in Beijing in 2025. Chinese internet via X
China's naval unmanned systems.
Consisting of (in order), AI enabled unmanned submersible (HSU-100), used for detection and attack.
Unmanned patrol boat.
Unmanned mine-laying/attack submersible (AJX-002), this was previously mistaken for a nuclear powered torpedo. Because the… pic.twitter.com/Mlj55XLNBH
“This arrangement also has a significant drawback: each floating dock can only carry a single XXLUUV,” Sutton added. “Or if more than one, then they both need to be placed in the water at the same time. Because the whole dock floods, there cannot be one undergoing maintenance while another is being launched or recovered.”
A mothership vessel able to discreetly deploy and recover large uncrewed and crewed submersibles and other large payloads underwater could be tasked with more specialized missions, including cutting cables, retrieving objects from the seabed, and other kinds of undersea espionage. There is overlap here with more benign roles, such as submarine rescue, salvage, and even deep-sea scientific research. There is also the matter of servicing an expanding array of Chinese underwater infrastructure, including sensor and communications networks. As something of a corollary, Russia’s spy ship Yantar is officially described as an oceanic research vessel. In China, the line between military and non-military assets and capabilities, including ships, is often very blurry, to begin with, as TWZ regularly highlights. This dichotomy was observed right at the Hudong-Zhonghua Shipyard around the end of last year after pictures of a commercial cargo ship being used to showcase a new family of containerized weapons, sensors, and other systems went viral online.
It is also worth pointing out that the boxy and largely enclosed design of the ship now being built at Hudong-Zhonghua Shipyard will inherently make it difficult to observe any activities onboard. This will have the additional knock-on effect of helping keep any payloads, as well as the crew, shielded from the elements. This could be valuable for operations in harsher locales, including waters in and around the Arctic, an ever-more strategic part of the world where China is working to be more engaged.
We also do not know if the apparent mothership vessel is intended to be a one-off or part of a larger class. It could be a stepping stone to broader plans or be part of an already extensive fleet of bespoke naval auxiliaries, as well as unique ostensibly commercial vessels, in service in China today. The PLAN’s aforementioned UUV ambitions will bring along significant test and evaluation requirements, as well as the need to support actual future operations.
If nothing else, evidence is only growing that the new ship under construction at the Hudong-Zhonghua Shipyard is intended to serve, at least in part, as a mothership for large submersible drones.
A French Navy Mistral class amphibious assault ship has been photographed carrying Naval Group’s new Rampart modular launcher, a system designed to allow a single weapon station to employ different types of rockets, missiles, and other effectors against a wide range of threats.
The imagery, captured off Toulon during training on September 21, reveals the launcher installed on the ship’s forward starboard sponson. While the specific identity of the vessel is unclear, this represents the first publicly observed evidence that Rampart has moved into shipboard testing.
French Navy Mistral-class amphibious assault ship and French Navy Suffren (Barracuda)-class nuclear-powered attack submarine off Toulon, France – September 21, 2026.@WarshipCampic.twitter.com/6xYm6E5J9R
Naval Group announced in June that the first at-sea firing campaign for Rampart was planned for October aboard a Mistral class ship during the French Navy’s Wildfire counter-drone exercise.
What makes Rampart unusual is its modular architecture. Rather than being built around one missile or rocket, the system uses interchangeable launch modules that can accommodate different weapons. This allows a ship to carry large numbers of relatively inexpensive guided rockets for counter-drone work while retaining the option of using larger and more capable short-range missiles against more challenging targets.
The Rampart, then still known as the Multi-purpose and Modular Launching System (MPLS), displayed at the EURONAVAL defense exhibition in November 2024. Photo by Thierry NECTOUX/Gamma-Rapho via Getty Images
Because the launch modules are interchangeable, the mix can theoretically be changed as the mission or threat environment changes.
The approach is aimed squarely at a problem that has become increasingly important for naval forces: defending expensive ships against potentially large numbers of inexpensive uncrewed systems and missiles without relying exclusively on high-cost interceptors.
Rampart was previously known as the Multi-purpose and Modular Launching System (MPLS). Naval Group unveiled the concept in 2023 as a self-funded development effort and formally presented the Rampart earlier this year.
The launcher uses four interchangeable ammunition modules. Depending on the configuration, Naval Group says that the system can accommodate up to 80 Thales 68mm laser-guided rockets or 48 NATO-standard 70mm laser-guided rockets. Other configurations can carry smaller numbers of short-range missiles (four to six per module, depending on type) or other effectors, including decoys.
The system has already been demonstrated with guided rockets. A January 2026 test involved a Thales 68mm guided rocket, followed by a series of firings at the Canjuers range in southern France in May. Those trials, seen in the video below, included engagements against targets at roughly two miles and a five-rocket salvo.
The relatively small guided rockets are particularly relevant to counter-drone operations. They offer a way of engaging aerial targets with a weapon substantially smaller than a conventional surface-to-air missile, while still providing precision guidance.
As well as rockets, Naval Group has been working with Thales on the Lightweight Multirole Missile (LMM). Also known as Martlet, the LMM is intended to tackle a range of challenging airborne and surface targets, as you can read about here.
The company has also explored integration of loitering munitions and other missiles, while a separate agreement with the UAE-based EDGE Group covers trials of the SkyKnight surface-to-air missile.
The company has also pursued integration of Poland’s Piorun short-range air-defense missile. This may well be with a view to a potential Polish purchase of Rampart to arm its forthcoming frigates, which you can read about here.
Polish Army soldiers fire a Piorun man-portable air defense system. U.S. Army photo by Davide Dalla Massara
This means the launcher is effectively being developed as an open weapons-integration platform, rather than as a dedicated launcher for one or a small set of particular munitions.
That openness could make Rampart attractive to a wide range of navies. Instead of requiring customers to adopt a completely new missile family, the launcher can potentially be configured around weapons already in their inventories or sourced from their domestic defense industries. A country could therefore buy the common Rampart launcher while retaining control over the effectors it wants to integrate, whether those are guided rockets, short-range missiles, loitering munitions or other systems. At the same time, when it comes to air threats, this is very much a point defense system for close-in engagements, and a last line of defense to complement longer-range and more capable systems.
Naval Group has described the system as capable of operating either autonomously or as part of a ship’s combat system, with a stabilized turret and integrated fire-control equipment.
That integration will be particularly important during the upcoming sea trials. A launcher that works against stationary or land-based targets still has to contend with ship motion, vibration, sea spray, sensor integration, and the compressed timelines involved in defending a moving vessel.
France operates three Mistral class amphibious assault ships, which serve as major aviation, command, and amphibious warfare platforms. Their size and mission make them high-value assets that could face a broad range of aerial threats during operations. Another two vessels were built to the same design for Russia, before being placed under embargo, and then sold to the Egyptian Navy.
The French Navy amphibious assault ship Mistral. U.S. Marine Corps photo by Cpl. Gary Jayne III/Released
Naval Group’s choice of a Mistral for the initial at-sea campaign provides an opportunity to test Rampart under realistic operational conditions while integrating it with an existing French naval combat system.
In its basic form, each Mistral is armed with a pair of Simbad launchers, each of which is fitted with two Mistral short-range surface-to-air missiles. In terms of guns, each of the vessels is armed with two 30mm and two 20mm cannons, two 7.62mm M134 Miniguns, and four 12.7mm machine guns. Adding even a single Rampart launcher provides considerably more options against aerial targets across a wide range of threats — depending on the effectors that are included.
Loading guided rockets into a Rampart launcher during ground-based tests. Naval Group screencap
If Rampart can reliably engage drones with inexpensive guided rockets while retaining the ability to employ more capable missiles from the same launcher, it could offer navies an additional defensive layer between conventional guns and high-end surface-to-air missile systems.
Critically, new effectors could potentially also be integrated as they become available, allowing the system to evolve without replacing the entire turret.
Reflecting the urgency of the requirement, Naval Group’s development path for Rampart has been relatively rapid.
Naval Group has also demonstrated a ground-based Rampart, mounted on a high-mobility truck chassis. This configuration is intended for mobile air defense missions as well as protection of fixed sites, giving the system a role beyond ship self-defense. The truck-mounted version could provide a rapidly relocatable launcher for counter-drone and short-range air-defense missions, while retaining the same basic modular architecture and ability to employ different effectors.
Sur le stand John Cockerill, un châssis Zetros équipé du Rampart (ex lanceur modulaire polyvalent, ou LMP) de Naval Group. Avantage : un seul système de lancement pour des armements divers (roquettes, missiles, grenades, leurres, drones…) pic.twitter.com/6v4R93HGsj
The photographs from Toulon indicate that the Rampart concept is now moving from the range to the French fleet, albeit on an experimental basis. The forthcoming sea campaign will be an important milestone and should provide a better idea of how this system works at sea.
A British Excalibur uncrewed underwater vehicle (UUV) has fired a U.S. Mk 48 heavyweight torpedo in what is said to be a first-of-its-kind test for both countries. Though just a proof-of-concept so far, this is a significant new step for the United States and the United Kingdom toward future operational fleets of armed UUVs.
U.S. NAVY UPDATE: U.S. Navy and Royal Navy Successfully Test Fire Torpedo from Unmanned Undersea Vehicle
WASHINGTON – On September 13, 2026, the U.S. Navy and the Royal Navy successfully conducted the proof-of-concept launch of an exercise U.S. Mk 48 Heavyweight Torpedo… pic.twitter.com/lVB4wYSwC0
— Office of the Chief of Naval Operations (@USNavyCNO) September 22, 2026
The test was also carried out under the umbrella of Pillar 2 of the trilateral Australia-United Kingdom-United States (AUKUS) defense cooperation agreement, which was first announced in 2021. AUKUS’ Pillar 2 covers a wide range of advanced technology cooperation, with particular focus on uncrewed platforms and autonomy. Pillar 1 of the agreement centers on support for Australia’s establishment of a nuclear submarine force.
For the September 13 test, the Mk 48 torpedo was slung under the Excalibur UUV. The nearly 40-foot (12-meter) long, 19-metric-ton submersible drone has a large internal payload bay, but it is reportedly not large enough to accommodate the Mk 48, which is the standard heavyweight torpedo in U.S. Navy service today. The 19-foot-long, 21-inch-diameter weapon has been successively upgraded over the years to expand its capabilities and improve its resistance to enemy countermeasures.
Screen captures from a video the US Navy released today showing the release of the Mk 48 torpedo from the Excalibur UUV during the test earlier this month. USN capturesA stock picture of a Mk 48-series torpedo. DODA US Navy infographic detailing just some of the upgrades to the Mk 48 series over the decades. The Navy has now moved on to the further improved Mk 48 Mod 8 variant. USN
The Royal Navy officially unveiled Excalibur, which was developed by U.K.-based MSubs under Project Cetus, last year. The external torpedo launch capability was the result of two additional efforts, called Project Broadsword and Trial Iron, according to the U.S. Navy release.
A picture of an Excalibur UUV at the time of its unveiling in 2025, giving a good general sense of its size. Royal Navy
The September 13 test “successfully validated the mechanical, electrical, and software integration of a U.S. kinetic payload onto an allied autonomous vessel, proving that allied forces can rapidly achieve weapon interchangeability,” the Navy’s release adds. “Approved in February 2026 by the Department of the Navy Rapid Capabilities Office (DONRCO), the project was executed in less than seven months.”
How the Excalibur UUV was controlled during the test and whether the torpedo was launched at a test target of some kind are unknown. TWZ has reached out for more information.
A look at the Excalibur UUV submerged, from the video the US Navy released today. USN capture
“BROADSWORD is a great example of how AUKUS Pillar II drives interoperability in across the alliance. Demonstrating the launch of a US torpedo from a UK extra-large unmanned underwater vehicle (XLUUV) is an important early step in developing lethality in our undersea autonomous systems,” U.S. Navy Vice Adm. Robert Gaucher, Director of Submarine Programs, did say in a statement. “We look forward to continuing to leverage the AUKUS partnership to keep pushing the potential warfighting advantages of unmanned undersea systems.”
“This successful test marks a historic first for allied undersea warfare,” U.S. Navy Adm. Daryl Caudle, Chief of Naval Operations, also said in a statement. “Proving that we can seamlessly launch a U.S. heavyweight torpedo from a Royal Navy autonomous underwater vehicle validates our shared vision for true interchangeability.
“This is a really important moment in our journey towards building a hybrid navy, which is where the Royal Navy will sail with crewed ships and submarines alongside uncrewed and autonomous vessels,” Luke Pollard, U.K. Minister of State for Defence Readiness and Industry, separately said in an interview with LBC radio. “It is a substantial increase in our lethality, to show that torpedoes can be fired not just by the Astute class hunter-killer submarines that we have in the Royal Navy, but also now by our uncrewed systems.”
A Royal Navy Astute class nuclear-powered attack submarine. UK Ministry of Defense
The U.S. Navy and the Royal Navy employ various tiers of UUVs operationally today, but primarily for mine-sweeping and reconnaissance and surveillance missions. Future fleets of submersible drones capable of carrying out attacks on other vessels will create entirely new operational possibilities. Operated closely together with crewed surface warships and submarines, torpedo-toting UUVs could be sent ahead into riskier environments and offer an immediate option for engaging any threats they might find. Even a bigger UUV like Excalibur would also be more challenging for opponents to spot and track than a traditional attack submarine.
Excalibur is also in a category of larger and more capable submersible drones that offer significant endurance and higher degrees of autonomy. Adding in the ability to launch torpedoes, in turn, then opens the door to new concepts for employing these UUVs in groups more independently of crewed companions. In the future, for instance, armed Excaliburs or similar UUVs might be deployed to a particular maritime choke point to not just monitor for enemy movements, but actively hold them at risk.
In addition, in general, UUVs offer a way to expand total undersea warfare capacity in a more cost-effective manner compared to acquiring and fielding more traditional submarines. The ability to have more presence below the waves at a lower price point also translates to more persistence across large areas, something that could be especially valuable across the broad expanses of the Pacific, as well as other bodies of water globally. This presents additional targeting challenges and uncertainty for opponents.
“In securing the North Atlantic, especially against those nations that wish to do us harm, like Russia, the ability for us to now say it’s not just where our submarines are that you need to worry about – it is about how we create greater deterrence and question marks in the eyes of our adversary, with uncrewed systems there as well,” U.K. Minister Pollard said in speaking with LBC.
Pollard’s remarks here speak to particular considerations the British government is faced with just in its backyard. This includes the so-called Greenland-Iceland-United Kingdom (GIUK) Gap, which is the main path through which Russian Navy submarines transit to and from bases in the northwestern end of that country and the Atlantic proper. There is also the English Channel and the nearby Baltic Sea. The Royal Navy has limited capacity with its crewed submarines to monitor this and other critical regional chokepoints. UUVs could then help take pressure off its fleet of just five (of a planned seven) Astute class submarines, helping free those boats up for the myriad other missions they are tasked with, including carrier escort and special operations support.
“By converting commercial and allied uncrewed undersea hulls into high-end strike assets, the partnership drastically alters the cost-exchange ratio in contested maritime environments,” the U.S. Navy’s press release today notes, as well.
There are still many questions still to be answered about future larger UUV operations, including just how they will be deployed and recovered. Video the U.S. Navy released today shows that the torpedo-armed Excalibur was launched into the water in Scotland using a commercial truck-mounted crane. U.S. shipbuilders Huntington Ingalls Industries (HII) and General Dynamics National Steel and Shipbuilding Company (NASSCO), among others, have been working on new options for launching and retrieving larger drone submersibles from surface warships. External carriage on the hulls of ships and/or submarines might also be an option in the future.
A picture from a test in 2022 of a prototype portable cradle for launching large UUVs developed by HII. The UUV seen here is that company’s Proteus design. HII
Additional torpedo and other munition options for UUVs beyond the full-size Mk 48 could also be on the horizon. The U.S. Navy has invested heavily in compact and lightweight torpedo designs that could be well suited for employment from underwater drones like Excalibur.
The U.S. Navy says it is working with its international partners on another similar UUV capability demonstration, but this time involving an Anduril Dive-XL, under what is dubbed Project Cutlass. This effort “will tackle advanced payload integration data, command and control architectures, and tactical employment scenarios to further mature uncrewed undersea capabilities,” according to the U.S. Navy’s release.
The Royal Australian Navy is already in the process of acquiring and fielding a militarized version of the Dive-XL, called Ghost Shark. It’s also worth noting that the Dive-XL evolved from the earlier Dive-LD design. The Dive-LD is in at least limited operational U.S. Navy service now, a fact that was revealed by Iran’s capture of one of these submersible drones earlier this month, as you can read more about here.
Excalibur’s ability to launch a standard Mk 48 heavyweight torpedo is already an important show of progress now toward a shared goal of a future underwater ecosystem that includes submersible drones that are able to attack other vessels.
Recent satellite imagery of a shipyard in northeastern China offers interesting new insights into the country’s next-generation submarine developments. The images notably show a pumpjet propulsor and other features worth examining on an example of what is generally described as a new class of nuclear-powered attack submarine, or SSN.
TWZ has obtained a new image taken on September 18 of the submarine in question, which is being built at the Bohai Shipyard in Huludao, from Vantor. Janes reported on this submarine earlier today, based on a separate Vantor image from September 1. The outlet also described the boat as a Type 095, a commonly used, but still unofficial designation. This is something we will come back to later on.
As mentioned, the pumpjet propulsor immediately stands out in both images. This is also understood to be a feature on the Type 093B nuclear-powered attack submarine, a significantly improved variation on that earlier design, which first emerged in the early 2020s. Compared to traditional exposed propellers and more basic shrouded types, pumpjets offer benefits for quieter operation and efficiencies, especially at higher submerged speeds.
The recent imagery also highlights the submarine’s X-shaped stern plane arrangement. This is not found on the Type 093B, which is considered to be something of a bridge between that class and the next-generation design. Broadly speaking, an X-shaped configuration offers advantages when it comes to enhanced maneuverability, efficiency, and safety, which can be particularly useful in littoral environments. It can also provide benefits when it comes to acoustic signature reductions across significant parts of the submarine’s operating envelope compared to the cruciform stern planes.
Another Chinese submarine design that emerged in 2024, currently referred to as the Type 041 or Zhou class, and that is understood to feature a hybrid nuclear/conventional propulsion system, also has an X-shaped stern configuration. The first known example of the Type 041 came to light after it appeared to have sunk in a shipyard.
An X-shaped stern arrangement also looks to be a feature on yet another new class of submarine that appeared at the JN (Jiangnan) Shipyard in Shanghai earlier this year. Initial reports also suggested that the design lacked a traditional sail. However, it has been confirmed that it has a sail, but that is very small proportionally to the overall size of the boat. Truncated sails can offer performance and other advantages, but there are trade-offs.
The image of the submarine that Janes obtained also notably shows an open rectangular-shaped section aft of the sail. The September 18 image that we received from Vantor shows a structure placed over that section of that submarine, obscuring ongoing work on that part of the boat. The Type 095 is widely expected to feature some type of vertical launch system (VLS) array able to accommodate a variety of anti-ship and land-attack cruise missiles, as well as potentially hypersonic types. The Type 095 is also sometimes referred to as a guided missile submarine, or SSGN, as a result. The open area seen in the September 1 shot could be where the VLS array is set to be fitted. It might also provide access to the reactor compartment or another area of the submarine.
The clearest photos we have on the Type 095 SSN!
As we can see, there is one confirmed chamber than could physically fit about 18-24 VLS Cells. There is a big chance that more than one VLS Chamber exists, with an estimate VLS count from 24-48+ VLS pic.twitter.com/0ZJ8gsl4su
Interestingly, the September 18 image also shows what look to be at least two relatively large circular openings, side-by-side, at the bow end of the submarine in front of the sail, the purpose of which is not immediately clear. There is a possibility these could also be for vertically launching munitions or other payloads. As a point of comparison, U.S. Virginia class nuclear attack submarines, starting with the Block III version, have two large-diameter Virginia Payload Tubes (VPT), one in front of the other, in the bow in front of their sails. At the same time, the openings on the submarine in Huludao also appear to be in a position that is very close to where the submarine’s main sonar array would be installed, and they could be tied to that aspect of the design, too.
“I think it’s too early to be sure about the VLS configuration from publicly available imagery. I realize people assume the large rectangular space halfway behind the sail is the VLS, but I am not sure this is the case and I’d caution to jump to conclusions. The space could also be related to work on the reactor compartment,” Alex Luck, a naval analyst who closely tracks submarine and Chinese navy developments, told TWZ. “With Type 093B, the VLS after launch was initially covered with a tarp, and then the installed launchers were readily visible quite quickly during the fitting-out process. The work process may change with these newer boats, but the different appearance during launch and fitting out needs to be considered in that regard.”
“I do expect Type 095 to have a VLS of some sort, but I am not sure as of yet what the configuration would look like, or where exactly it is located,” he added.
The bigger outstanding question may be exactly what type of submarine is currently being built now at the Bohai Shipyard. Based on a review of additional imagery from Planet Labs’ archive, the boat appears to be around 394 feet (120 meters) long. When the first example of what was assessed to be a Type 095 emerged in Huludao in February, it was estimated to have a length of roughly 361 feet (110 meters). The ‘small sail’ design that broke cover earlier this year in Shanghai is also estimated to be some 394 feet/120 meters long based on available imagery, but also looks to be narrower than the boat presumed to be a Type 095 in February.
“One significant question is the nature and difference between the boat launched by Bohai in February, and the two newer hulls launched in late May/early June both by Bohai and at Jiangnan in Shanghai,” Luck, the naval analyst, also told TWZ. “Specifically, we do not quite know whether they are for different operational roles, or rather a two step development for one final configuration of a new SSN. I think the latter is at least plausible.”
“A related question then is what boat we are looking at now with the new imagery, i.e. the February boat or the newer hull Bohai had launched,” he continued. “Without exact and reliable measurements that question for now is unresolved in the public discourse. For now we need more, and more detailed imagery, including of the different boats together, to clarify these aspects.”
“This [September 1] image reinforces my impression that the boat launched in February may have been a one off not including the full spec featured on the notional 095A launched by Bohai and Jiangnan in late May. We’ve already seen both versions side by side in Bohai,” Luck also wrote on X after Janes‘ published its report.
This image reinforces my impression that the boat launched in February may have been a one off not including the full spec featured on the notional 095A launched by Bohai and Jiangnan in late May. We've already seen both versions side by side in Bohai. https://t.co/wBMkB1gmSQ
Regardless, the emergence in recent years of so many new, more modern submarines, and across what appear to be several distinct classes, is significant. It is no secret that China’s People’s Liberation Army Navy (PLAN) is working to significantly expand the size and capabilities of its submarine force with a clear eye toward extending operations further and further out in the Pacific, at least. In the past, U.S. officials have publicly said the overall quality of newer Chinese submarines has been getting closer in parity to American designs.
“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.
In particular, the Type 095, as well as the new Type 096 nuclear-powered ballistic missile submarine, “represent next-generation platforms expected to enter service during the late 2020s through 2030s,” Brookes also wrote at that time. “These submarines will incorporate substantial advancements in nuclear reactor design, sensor performance, weapons integration, and noise quieting technologies.”
Submarine modernization efforts are just one aspect of a larger effort by the PLAN to expand its capabilities above and below the waves. Chinese shipyards have also been producing ever-more capable aircraft carriers, amphibious assault ships, destroyers, frigates, and more in recent years, as well. The pace of China’s construction of new surface ships and submarines has also been growing, creating a particularly significant and still-widening disparity in this regard with the U.S. Navy. This is something that has become increasingly concerning, as TWZ routinely highlights.
Work in Huludao, as well as shipyards elsewhere in China, is certainly already revealing interesting new insights into China’s next-generation submarine efforts.
Japan has said it is keeping the door open to acquiring nuclear-powered submarines, a potentially major shift for a country whose submarine force has historically relied exclusively on conventional propulsion. Defense Minister Shinjiro Koizumi confirmed recently that Tokyo is not ruling out nuclear-powered submarines as it considers the future requirements of the Japan Maritime Self-Defense Force (JMSDF).
Should Japan ultimately pursue the capability, it would join an exclusive group of nations operating nuclear-powered submarines. China, France, India, Russia, the United Kingdom, and the United States are currently the only countries with nuclear-powered submarines in active service. Brazil is already working to join the club, while Australian and South Korean nuclear-powered submarine plans are somewhat longer-term.
A submarine of the Japan Maritime Self-Defense Force surfaces during a naval review off Sagami Bay, Japan. Photo by Koichi Kamoshida/Getty Images
Japan’s submarine fleet is already regarded as among the most capable conventionally powered forces, and is very much at the forefront of advanced naval propulsion technologies. Even with that considerable expertise, however, developing and sustaining a nuclear propulsion capability would represent a huge challenge, requiring expertise and infrastructure far beyond those needed to build Japan’s existing conventionally powered submarines.
Koizumi’s comments do not represent a decision to acquire nuclear-powered submarines, nor do they indicate that Japan has begun a procurement program. They do, however, mark a significant evolution in the country’s public debate over submarine propulsion and point to a growing willingness within the Japanese defense establishment to consider capabilities that were previously largely outside the mainstream of defense planning.
Secretary of War Pete Hegseth hosts a bilateral meeting with Japanese Minister of Defense Shinjirō Koizumi at the Pentagon, Washington, D.C., Jan. 15, 2026. (DoW photo by U.S. Navy Petty Officer 1st Class Alexander Kubitza)
Currently, Japan operates one of the world’s most capable conventional submarine fleets, centered on increasingly sophisticated diesel-electric boats equipped with air-independent propulsion and advanced lithium-ion batteries. These submarines are well suited to operations around Japan and the country’s surrounding waters.
The JMSDF currently operates 22 conventionally powered submarines, maintaining the force structure established in the 2010s while progressively replacing older boats with the more capable Taigei class. Five Taigei class submarines are now in JMSDF service, with additional boats in the pipeline.
The first-of-class Taigei was launched on October 14, 2020, at the Mitsubishi Heavy Industries (MHI) shipyard in the city of Kobe, in the western prefecture of Hyogo. Japan Maritime Self-Defense Force
Nuclear propulsion, however, would offer substantially greater endurance and sustained underwater speed, allowing Japanese submarines to conduct longer-range operations across the broader Western Pacific with minimal support. This is a requirement that is becoming increasingly relevant as Tokyo’s strategic focus expands beyond its immediate maritime approaches.
China’s rapidly expanding naval force, including its growing submarine fleet and increasingly distant maritime operations, is forcing Tokyo to consider how it would monitor and potentially counter Chinese forces farther from the Japanese archipelago. A nuclear-powered attack submarine could remain submerged for extended periods without the endurance limitations imposed by conventional propulsion, making it particularly useful for long-range surveillance, tracking, and sea-denial missions.
Japan’s debate is also unfolding alongside a significant development in neighboring South Korea. Seoul has confirmed plans to develop a new class of nuclear-powered submarines, a move that could add further momentum to an emerging undersea competition in Northeast Asia. South Korea’s decision is particularly relevant to Tokyo because it demonstrates that nuclear propulsion is no longer merely a theoretical capability for U.S. allies in the region. While the missions and strategic priorities of the Japanese and South Korean navies are different, both countries face the challenge of operating in waters increasingly contested by China and North Korea.
A South Korean Ministry of Defense rendering shows how the nuclear-powered Jang Bogo N Project boats may look. MND
A Japanese decision to pursue SSNs could eventually create a much deeper basis for cooperation with Australia, including submarine interoperability, undersea warfare, workforce and technical expertise, infrastructure, sustainment, and potentially aspects of the industrial base. Analysts have already examined how Japan could fit into the wider AUKUS submarine ecosystem as Australia’s nuclear-submarine program develops.
Concept art of the submerged SSN-AUKUS nuclear-powered attack submarine. U.K. Ministry of Defense illustration
A Japanese nuclear-powered submarine with a robust capacity to launch land attack cruise missiles would also be a powerful component in the country’s emerging “counterstrike” posture, which is increasingly centered on acquiring the ability to strike targets at longer ranges.
Launch of the first Tomahawk missile from the Kongōclass Aegis destroyerChōkaiat an undisclosed location in the Pacific. Japan Ministry of Defense
An SSN would potentially add a highly survivable, mobile platform to this emerging strike architecture, allowing Japan to position long-range weapons farther from its home territory and complicating an adversary’s efforts to locate and neutralize them. That could be particularly valuable in a conflict in which Japanese air bases, missile batteries, and other fixed infrastructure were under attack.
The potential SSN requirement also fits with Japan’s expanding expeditionary ambitions. As the JMSDF converts its Izumo class helicopter destroyers to operate F-35B fighters, giving Japan a more credible carrier aviation capability, nuclear-powered attack submarines could provide a valuable escort for these increasingly important surface groups. Their speed, endurance, and ability to remain submerged for extended periods makes SSNs particularly well suited to accompanying carrier forces on longer-range deployments and supporting contingencies farther from Japanese waters.
Looking at the bigger picture, it is highly significant that nuclear propulsion was effectively excluded from Japan’s conventional defense debate for decades. More recently, however, Japanese defense officials and policymakers have begun examining whether future submarines will require a different propulsion system. The issue is now one that can be discussed openly at the ministerial level.
Nevertheless, pursuing a nuclear-powered submarine program would come with huge challenges.
The Japan Maritime Self-Defense Force Sōryū class submarine Hakuryū arrives at the submarine piers of Joint Base Pearl Harbor-Hickam. U.S. Navy photo by Mass Communication Specialist 1st Class Steven Khor/Released
Building and operating nuclear-powered submarines would require Japan to establish an entirely different industrial, regulatory, and training infrastructure. The vessels would also be considerably more expensive and complex to build and operate than Japan’s existing conventionally powered submarines. Tokyo would have to resolve questions involving nuclear regulation, reactor technology, maintenance facilities, crew training, and the handling of nuclear material.
There would also be a significant political dimension. Although naval nuclear propulsion is fundamentally different from possessing nuclear weapons, any move in that direction would inevitably receive scrutiny in a country whose postwar security policy has been shaped by its experience with nuclear weapons and its longstanding non-nuclear principles.
For those reasons, Koizumi’s statement should be viewed less as an announcement of a Japanese nuclear-submarine program than as evidence that the political barrier to discussing such a program is falling.
The Japanese Oyashio class submarine Yaeshio transits the Philippine Sea during Exercise Pacific Vanguard 23. U.S. Navy photo by Mass Communication Specialist 3rd Class Santiago Navarro
The next question is whether the Japanese government will move from keeping the option open to actually studying a nuclear-powered submarine design, propulsion technology, and acquisition pathway in detail.
If it does, the consequences could extend well beyond Japan’s submarine fleet. A Japanese nuclear-powered submarine capability would represent a major enhancement of Tokyo’s ability to operate across the Western Pacific and could alter the undersea balance between Japan, China, and the United States’ other regional allies. At the very least, the idea is one that is now part of wider discussions at the highest levels.
As both the Navy and the USAF were racing to field a new generation of advanced tactical jets, the seagoing service’s program hit a wall. A major reason behind this from the Pentagon was concern that the U.S. industrial base could not handle simultaneous final development and production of two extremely complex new fighter aircraft. This was a controversial justification that many had a hard time swallowing. The Navy’s program, dubbed F/A-XX, is supposedly back on and a down-select on who will build it is coming soon, but that concern appears to linger among at least one of the Department of War’s top acquisition officials.
Though he remains confident that the U.S. Air Force F-47 sixth-generation fighter will fly in the next two years, Air Force Gen. Dale R. White, Director, Critical Major Weapon Systems — the service’s leading weapons procurement advisor — remains concerned about the overall capacity of industry to provide the military with the aircraft it needs, including two new fighters. His comments were in response to questions about the Navy’s challenges in building its own sixth-gen fighter alongside F-47.
The concerns are “not unique” to the F-47 or the Navy’s program but the problem exists to various degrees across the industrial base too, White told reporters Tuesday during a media roundtable at the Air & Space Forces’ Air, Space and Cyber Conference that TWZ is attending.
White has a dual-hatted role, serving as the Pentagon’s top weapons procurement officer and as the senior acquisition advisor to the Secretary of the Air Force for all acquisition matters.
A rendering of the F-47. (U.S. Air Force) U.S. Air Force
“We’re seeing it in multiple platforms,” said White, who did not elaborate. “And so what we’re having to do is, at some point, we’re having to make some trade space in between some of these.”
“I see Boeing making smart investments,” White said of the prime contractor of the F-47, selected for the U.S. Air Force’s Next Generation Air Dominance (NGAD) ‘fighter’ initiative. “They have a lot of CAPEX [capital expenditure] that they’re pouring in, but we have to get through the process of the design piece, getting that completed and closed out. Then we all hit some major milestones with things like flight tests and software and those things.”
F-47 specifications infographic (USAF)
“Really, it’s just being able to manage the overall resourcing as it relates to number one, people resources,” the general added. “Number two, when you start getting into the production conversation, do we have enough capacity to be able to produce at that rate? And so, by and large, I have concerns. I have concerns about the capacity of our industrial base, but they are not unique to F-47 or to any program.”
As for the F-47, White said the program “continues to progress exceptionally well.”
“As you know, many, many years in tech maturation and risk reduction gave us a tremendous head start on this program,” White explained. “Extremely proud of what the team has done, what they continue to do each and every day. We are still absolutely on [the] path to be able to hit the mark of flying within this administration. So we see no issues in front of us right now.”
While the first example of the F-47 has been in production for about a year now, the Navy has yet to even select a prime contractor for its next generation fighter. The current competitors for the F/A-XX are Boeing and Northrop Grumman. A decision was supposed to have been made by last month.
“The F/A-XX program remains on track, and we have no further information to provide at this time,” a Navy official told us last week.
In response to a question from TWZ earlier this year, the Chief of Naval Operations acknowledged the uncertainty over the F/A-XX program.
“One of the challenges we’re seeing is, not only [are] our peer competitors improving their capability for anti-air, either air-to-air or surface-to-air, but the lower cost of entry of very capable weapons is also making more players on the field in which that level of stealth and technology is required,” Adm. Daryl Caudle told us back in April at the Sea-Air-Space 2026 exposition. “So this is not about the need for a peer adversary. This is just having an aircraft that can operate with a level of uncertainty and with the acceptable level of risk.”
With Boeing as a finalist, it is also possible that F/A-XX could be a variant of the F-47. As we noted in a past story, the Boeing render for its F/A-XX concept is remarkably similar to artwork for its F-47.
Last year, Steve Parker, Boeing Defense and Space CEO, said he didn’t see a problem with his company building both jets stating that this had been part of the strategy all along.
If this is the case, the company’s claim that it would not have a problem building both the Navy and Air Force next-generation fighters would make more sense. There are a number of advantages when it comes to establishing a high-degree of commonality between F/A-XX and F-47, although there would also be challenges, especially when it comes to getting the most out of a design that was not meant to operate from a carrier deck and scaling production up for both services. There is already significant sharing of elements of both the Navy’s and Air Force’s sixth-generation fighter programs. So commonality in some subsystems and interoperability are already baked in.
We should hopefully finally get a clearer picture in the coming weeks about the status of the F/A-XX and possibly the answer to who will actually build it, which will give us a better idea of what the industrial base impact actually will be.
The Ukrainian Navy is claiming one of its uncrewed surface vessels (USV) sank a Russian USV, marking the first time one of these weapons, also known as drone boats, destroyed another. The engagement is the latest iteration in the use of combat drone boats, which Ukraine has employed to devastating effect against Russia’s Black Sea Fleet vessels and facilities, forcing the general evacuation of Russian naval assets from occupied Crimea to bases in Russia proper. The use of weaponized USVs is now proliferating around the globe at an increasing rate.
The incident took place somewhere in the Black Sea, said the Ukrainian Navy, which provided no details about when it happened or exactly where. TWZ cannot independently verify this claim; however, we cannot find any evidence of a drone boat killing another drone boat in the past.
“Units of the Main Intelligence Directorate (GUR) detected the target,” the Ukrainian Navy stated on Telegram. “The Ukrainian Navy’s ‘Sargan 3000’ unmanned boat, equipped with a remotely operated weapon station (RWS) Protector 12.7 mm, successfully destroyed it. This is the first naval battle in history between unmanned boats.”
An 81-second video released by the Ukrainian Navy opens with a view from the Sargan 3000’s onboard camera. It shows the Ukrainian USV acquiring, then engaging the Russian USV with its machine gun. It then cuts to a closer view of the Protector gun system firing at the Russian drone boat. At about the 30-second mark, the view switches to a feed from an aerial platform, though it is unclear if it is piloted or a drone. The video continues with the Sargan 3000 raking the Russian USV with its heavy machine gun until pieces start flying off and it eventually sinks, stern first.
Ukraine's Navy says a Sargan unmanned surface vessel destroyed a Russian unmanned boat with machine-gun fire in the Black Sea, the first-ever battle between unmanned surface vessels. Ukrainian Navy personnel operated in coordination with HUR. #Ukrainepic.twitter.com/Avg4ecz8m6
The Sargan 3000 (the name means needlefish in Ukrainian) was first introduced by Ukrainian President Volodymyr Zelensky in April as a “multi-purpose platform that has undergone testing and entered service with the Ukrainian Navy. These uncrewed vessels are highly maneuverable and capable of carrying out strike missions.”
“The maritime drone features a specialized low-profile hull with distinctive hydrodynamic lines and is constructed from materials that reduce its radar signature,” the publication explained. “The Sargan-3000 USV is equipped with a waterjet propulsion system (presumably powered by a diesel or hybrid engine to ensure a long operational range).”
AmalNews states that the Sargan 3000 is 6.9 meters (about 22.6 feet) long, 2.2 meters (about 7.2 feet) wide, with an operational radius of up to 1,600 km (about 994 miles) and can carry a payload of 450 kg (about 992 pounds). It travels at an estimated speed range of 40-55 knots.
During operations, the Sargan 3000 connects to Ukraine’s Delta situational awareness system, “enabling the real-time transmission of target data, video feeds, and telemetry to operators,” AmalNews noted. “It features multi-channel control capabilities, including redundant satellite communication terminals (utilizing secure Western commercial networks and NATO military networks).”
It is also equipped with “an autonomous inertial and optical navigation system to ensure operation in the event of GPS jamming, and it incorporates electronic countermeasures (ECM) modules.”
There are several variants of this USV. They include those equipped with machine guns; rockets; FPV drones; an electronic warfare version and one that lays mines, the publication added.
Ukraine’s Sargan-3000 naval drone was presented in an FPV drone carrier variant, additionally fitted with a remote weapon station. The type first appeared in combat conditions in early June, when one washed ashore and detonated in the waters of Romania’s Constanța port. #Ukrainepic.twitter.com/QyKnyJFqUq
The drone boat’s first publicly known combat engagement took place in July, when one “destroyed the Russian Federation’s FSB border guard ship Izumrud,” the Ukrainian Navy stated at the time.
“Ukrainian naval sailors sank the border guard ship of the 2nd rank with the Sargan-3000 maritime unmanned complex near Novorossiysk,” the Ukrainian Navy claimed on Facebook. “Among the crew of the ship are dead and wounded.”
It is unclear whether the USV acted as a kamikaze vessel or a weapons platform, although the former is most likely.
“It was Izumrud that on November 25, 2018, participated in the attack on the ships of the Ukrainian Navy in the Kerch Strait,” the service added. “Revenge is inevitable.”
Ukraine's Navy has sunk the Russian FSB Border Guard patrol ship Izumrud near Novorossiysk using the Sargan-3000 unmanned maritime system.
The vessel, a Rank 2 patrol ship, reportedly sustained catastrophic damage, with casualties and injuries among its crew.
— SPRAVDI — Stratcom Centre (@StratcomCentre) July 14, 2026
One sea drone killing another is a notable development given the damage these systems can inflict and the challenge of locating and destroying them on open waters. Being able to operate on the water over long distances and timeframes, they can be used to hunt down other drone boats, as what appears to have taken place in this engagement, or serve as a picket line of sorts to protect harbors, vessels and other targets that have been attacked by USVs in the past.
The Russian drone boat, which is not identified, did not appear to be armed.
Ukraine has carried out the world's first known combat mission in which a sea drone transported and deployed an armed ground robot behind Russian lines on the occupied Kinburn Spit. pic.twitter.com/zyJdFXWxVb
The U.S. used drone boats as kamikaze weapons for the first time in July, during an attack “on a submarine and ship maintenance facility in Iran,” U.S. Central Command (CENTCOM) announced on X at the time.
Yesterday, using multiple one-way attack surface drones, CENTCOM forces successfully struck a submarine and ship maintenance facility in Iran. Three Corsair unmanned surface vessels hit the port at Bandar Abbas Naval Base, marking the first time American forces have employed sea… pic.twitter.com/bOM2kmgRxz
Regardless, it looks like history was made with this incident in the Black Sea. But this involved a sea drone hunting down and destroying another that couldn’t fight back. Given the rapid pace of weapons development by both sides in the Ukraine war, it seems inevitable that a duel between two armed drones boats could soon follow.
Recently released pictures have highlighted a particularly interesting feature on the U.S. Navy’s Arleigh Burke class destroyer USS Mustin: a piggy-backed point defense system with a .50 caliber machine gun mounted on top of a 30mm chain gun. The Mk 38 Mod 4 Gun Weapon System (GWS) is interesting to examine as it offers significant boosts in firepower and other capabilities, including against drones, compared to preceding Mk 38 types.
Yesterday, Destroyer Squadron 15’s (DESRON 15) public affairs office released several pictures showing USS Mustin replenishing at sea in the Indian Ocean, including one highlighting the ship’s Mk 38 Mod 4 GWS (also sometimes confusingly referred to as a Machine Gun System, or MGS). DESRON 15 had put out another group of pictures late last month showing the weapon system being fired during routine training. Mustin was the first vessel in the Navy to receive Mod 4, and still looks to be the service’s only warship with this new version.
USS Mustin fires its Mk 38 Mod 4 GWS during live-fire training in the Indian Ocean in August 2026. USNAnother view of the Mk 38 Mod 4 GWS being fired. USN
“The Mk 38 Mod 4 Machine Gun System (MGS) is an upgrade … to address deficiencies in meeting Counter Unmanned Aerial Systems (C-UAS) requirements,” the Navy has said in the past. “In addition, the upgrade will also improve performance against surface targets and maintain Anti-Terrorist / Force Protection capabilities.”
To take a step back quickly, the original Mk 38 Mod 0 was developed internally by the Navy in the late 1970s and was simply a manually operated deck-mounted 25mm M242 Bushmaster chain gun with a maximum rate of fire of 180 rounds per minute. The M242 was entering U.S. Army service at around the same time as the main armament for the Bradley Fighting Vehicle. A product improved Mod 1 version was the first Mk 38 to actually enter serial production and began to be fitted to Navy ships in the late 1980s.
A Mk 38 Mod 1 weapon system, seen here mounted on the deck of the Oliver Hazard Perry class frigate USS Ingraham in 2003. USN
Following the deadly terrorist attack on the Arleigh Burke class destroyer USS Cole in the port of Aden in Yemen in 2000, the Navy began to acquire Mk 38 Mod 2s, also known as the Typhoon Weapon System, from United Defense (later BAE Systems).
The Mod 2 “introduced remote-control operation and mount stabilization and allowed the weapon to maintain aim even as the ship pitched and rolled. It also added a new electro-optical/infrared sensor and a laser rangefinder, giving the system reliable day/night target performance,” according to the Navy. “Beyond sensors, Mod 2 brought improved ammunition handling and enhanced interfaces – resulting in faster and more reliable engagement. Testing showed it delivered two to three times the strike accuracy of its predecessor.”
The Mk 38 Mod 2 otherwise featured the same M242 gun as the Mod 0/1 types, feeding from a magazine on the mount that could be loaded with up to 168 rounds. It is worth noting here that this is less than a minute of total firing time at the weapon’s maximum rate of fire. However, it can also be fired in single-shot and three-round burst modes, as well as at a lower automatic rate of fire of 100 rounds per minute.
In the 2010s, the Navy began acquiring the Mk 38 Mod 3 from BAE Systems, which added a smaller 7.62x51mm Mk 52 Mod 0 chain gun feeding from a 750-round magazine to the complete weapon system. The Mk 52 is also a much faster-firing weapon than the M242, with a maximum rate of fire of 570 rounds per minute.
The Mod 3 “also incorporated an improved EO/IR sensor that provides 330-degree surveillance capability and multiple fields of view,” per the Navy. “This sensor is decoupled from the gun, allowing operators to scan independently of the weapon and reducing the chance of alerting an adversary that they’ve been detected.”
Over the years, Mk 38 1/2/3 types have been integrated on a wide array of Navy ships, including Ticonderoga class cruisers, Arleigh Burke class destroyers, Nimitz and Ford class aircraft carriers, as well as a host of other amphibious warfare ships and auxiliaries.
The complete Mk 38 Mod 4 also comes with a new Mk 48 Mod 2 electro-optical sight system (EOSS), which is mounted separately on the ship, and a Mk 134 Mod 0 operator console for remote operation. Furthermore, the complete system is designed to be fully integrated with the Aegis Combat System on Arleigh Burke class destroyers like USS Mustin. The optical turret appears to replace the older EOSS system mounted atop the bridge that was primarily used to target the ship’s 5-inch gun. It isn’t clear how these new mounts are individually targeted simultaneously as they don’t appear to have their own optics. Radar targeting through Aegis would be a big advancement for at least some targets types, like drones. The older Mk 38s had their own individual FLIR systems. It’s still possible these new turrets could have a basic boresighted electro-optical system as well.
Various views of the main turreted weapons component of the Mk 38 Mod 4 system. MSI Defense SystemsThe Mk 48 Mod 2 electro-optical sight system (EOSS) that is also part of the Mk 38 Mod 4, but is mounted separately on the ship. MSI Defense Systems
In a July 2022 test, a Mk 38 Mod 4 system “successfully identified, tracked and engaged both surface and aerial targets using live ammunition against fixed and moving targets,” according to the Navy. The event “also highlighted the enhanced fire-control chain, the 30 mm gun’s improved performance and its ability to counter new challenges.”
The USS Mustinreceived its Mk 38 Mod 4 in 2024 and, as noted, this destroyer still appears to be the only ship in the Navy with this new weapon system, for reasons that are not entirely clear. The service had signed a contract with MSI Defense for an initial low-rate production batch of 15 systems in 2023. Other versions of the Seahawk DS30 are in use today on several classes of naval vessels globally, including British Type 23 frigates.
“USS Mustin (DDG 89), an Arleigh Burke class Aegis guided missile destroyer, was the first U.S. Navy warship to receive the upgrade. [The Naval Surface Warfare Center] Dahlgren Division is now finalizing the configuration so the system can be introduced to a wider set of platforms as fleet requirements evolve,” according to an official news item from Naval Sea Systems Command (NAVSEA) just this past February.
Another view of the Mk 38 Mod 4 on USS Mustin. USN
The Navy’s 2027 fiscal year budget request, released earlier this year, makes clear the plan is still to integrate the Mk 38 Mod 4 at least on all Flight IIA and Flight III subvariants of the Arleigh Burke destroyer. The Mk 38 Mod 4 is also set to be a feature on future U.S. Coast Guard icebreakers, which will also have combat systems derived from Aegis.
All remaining Mk 38 Mod 2s in Navy service are being brought up to the Mod 3 standard, as well.
For the Navy’s Arleigh Burke class destroyers, specifically, the Mk 38 Mod 4 reflects broader efforts to improve and expand the shorter-range defensive capabilities of those ships, especially against growing drone threats. An increasing number of these destroyers are also being equipped with new anti-drone interceptors. In addition, the service is working to replace the 20mm Vulcan cannon-armed Mk 15 Phalanx Close-in Weapon Systems (CIWS) on all subvariants in the class with different launchers for RIM-116 Rolling Airframe Missiles (RAM) to further bolster defenses against drones, as well as incoming missiles and other aerial threats.
Mustin may not be the only Navy warship equipped with the Mk 38 Mod 4 for much longer, if the system has not already started finding its way at least onto more Arleigh Burke class destroyers.
The U.S. Navy has lost an advanced uncrewed underwater vehicle (UUV), and it is now in Iranian hands. Here’s what we know about the Dive-LD drone and its apparent seizure, and its implications.
Authorities in Iran said earlier today that they had retrieved a U.S. Dive-LD uncrewed underwater vehicle (UUV) largely intact near the Strait of Hormuz. The regime in Tehran subsequently released pictures and video clips of the UUV being lifted out of the water, seen at various points below. This looks to be the first known instance of an operational deployment of the Dive-LD. This is still a relatively new capability for the U.S. Navy that only began entering service a little more than a year and a half ago. American officials have previously confirmed the use of UUVs, in general, to help keep the Strait of Hormuz free of Iranian naval mines, one of many threats that have dramatically slowed maritime traffic through this critical waterway.
Iran’s Islamic Revolutionary Guard Corps (IRGC) “captured one of the most modern, unmanned, and smart submarines … at the entrance to the Strait of Hormuz in a complex intelligence and operational action at dawn today,” according to a statement shared earlier today via Iranian state media. The exact circumstances surrounding the seizure remain unconfirmed.
“An underwater drone operated by U.S. forces malfunctioned more than a day ago,” a U.S. official said in response to our queries about the Iranian claims. “It was surveying regional waters in support of ongoing operations. The defective drone was an older model that neither collected sensitive data nor carried any classified sonar or radar equipment. U.S. operations in area waters continue.”
A top-down look at the Dive-LD Iran said it recovered. Iranian quasi-state media via XAn image showing the Dive-LD UUV being hoisted out of the water. Iranian quasi-state media via XThe Dive-LD markings, with the “V” worn away, seen on the side of the UUV. Iranian quasi-state media via X
The official did not confirm or deny the type of UUV in question, or that Iran had retrieved it. They also did not elaborate on the nature of the malfunction. TWZ also reached out to Anduril, which initially deferred any questions to U.S. Central Command (CENTCOM). However, they subsequently confirmed the loss of a Dive-LD operating in the region.
“Dive-LD is an attritable autonomous system, meaning it is designed from the outset to operate in dangerous environments where loss of the vehicle is an expected possibility. Its purpose is to keep warfighters out of the most dangerous parts of the undersea mission,” an Anduril spokesperson told us in a statement. “This vehicle had already delivered significant value operating thousands of hours in months-long operations in CENTCOM.”
Categorized as a large UUV, the Dive-LD is 19 feet (approximately 5.8 meters) long, four feet (around 1.2 meters) in diameter, and has a gross weight of close to three tons. The design features a 3D-printed exterior, but is said to be capable of diving down to depths of some 19,685 feet (3.7 miles or 6,000 meters). The UUVs can also remain at sea for around 10 days at a time, depending on their exact configuration, and do so with a high degree of autonomy. Dive-LD was originally developed by U.S.-based Dive Technologies, which was founded in 2018 and then acquired by Anduril in 2022.
Anduril announced the delivery of the first Dive-LD to the U.S. Navy’s Unmanned Undersea Vehicle Group One (UUVGRU-1) in April 2025. The Navy had already released a picture of personnel training with one of these UUVs five months earlier. How many Dive-LDs are now in U.S. service is unclear.
Members of Unmanned Undersea Vehicle Group One (UUVGRU-1) and Undersea Vehicle Squadron Three (UUVRON-3) train with a Dive-LD UUV in December 2024. USN
The Dive-LD has a highly modular design. Anduril’s website says that the UUV can be configured for various military missions, including so-called intelligence preparation of the operational environment (IPOE); general intelligence, surveillance, and reconnaissance (ISR); mine warfare; and precision placement of objects underwater. IPOE refers to the collection of various types of intelligence on a specific area as part of planning for upcoming operations.
As mentioned, U.S. officials have previously stated that UUVs have been supporting mine-clearance operations in and around the Strait of Hormuz. Broadly speaking, uncrewed underwater platforms offer a way to find and record the location of naval mines using sonars, cameras, and other sensors, while helping keep friendly forces further away from potential threats. Afterward, depending on the type of mines that are found, various methods can be employed to neutralize them. Mine sweeping is time-consuming and dangerous, even in permissive environments, let alone when conducted under the threat of enemy attack.
This past weekend, the Financial Times newspaper in the United Kingdom published a story saying U.S. forces have been using UUVs in exactly this way to help clear Iranian mines, citing “people familiar with the operation.”
“Mostly at night, it [the U.S. military] sent Navy Seal [sic SEAL] divers, robot boats and specialised underwater craft into the perilous strait for a four-month mine-clearance mission,” according to FT‘s report. “U.S. Navy divers worked in small teams using inflatable-hulled craft. They located Iranian mines with the help of robot boats and submersibles – such as the U.S. Navy’s Common Uncrewed Surface Vessel – operating towed sonar arrays.”
The Common Uncrewed Surface Vessel (CUSV) is a speedboat-sized drone boat that has been in Navy inventory since the early 2020s, explicitly for counter-mine operations. FT‘s story does not say where any USVs, UUVs, and/or boats full of divers were launched from as part of these operations in and around the Strait of Hormuz, but it posited that the Navy’s Expeditionary Sea Base ship USS Miguel Keith could have been involved.
A stock picture of the US Navy’s Expeditionary Sea Base ship USS Miguel Keith. USMC/Sgt. Luis Agostini
A trio of Independence class Littoral Combat Ships specifically configured for mine-sweeping duties, including using CUSVs, had been forward deployed in Bahrain before the start of the conflict with Iran in February. At least two of those ships, USS Santa Fe and USS Tulsa, emerged thousands of miles away in Southeast Asia in March, something TWZ was the first to report on. At the time of writing, those ships currently appear to be in Singapore. The exact disposition of the third of these LCSs, the USS Canberra, is unclear, but USNI News reported today that it is sailing in the South China Sea.
The Navy has a host of other warships in the Middle East that could support counter-mine missions. With a 10-day endurance, Dive-LDs, specifically, could potentially have been launched from locations away from the Strait of Hormuz, including friendly ports.
Dive-LDs could also be used for other missions beyond mine clearance in the region. As mentioned, the U.S. official told TWZ the UUV had malfunctioned while “surveying regional waters.” While this would be a relevant task in the context of a larger mine-sweeping operation, underwater surveys would be valuable for other purposes, too. For months now, U.S. forces have been facilitating the movement of ships in and out of the Persian Gulf via a route that hugs the Omani coastline, keeping them as far from Iranian threats as possible. Having up-to-date and highly accurate maps of the seafloor in these areas would be critical to ensuring they are deep enough for large commercial vessels to pass through safely.
Chief of Naval Operations Adm. Daryl Caudle, at right, is shown a Dive-LD UUV during a visit to Naval Base Kitsap-Keyport, Washington, in June 2026. USN
IPOE and general ISR support, above and below the waves, would be part of any current or future U.S. activities in the region. This includes a new campaign of strikes targeting Iranian tanker ships that began last month and monitoring general port activity in Iran as part of the ongoing blockade.
Employing Dive-LDs in operations against Iran also provides a valuable real-world opportunity to prove out new UUV capabilities and associated tactics, techniques, and procedures, which could prove critical in a future high-end fight against a peer opponent like China. Dive-LD has been feeding into Anduril’s development of an even more capable large UUV called Ghost Shark, the first customer for which is the Royal Australian Navy. Ghost Shark is a militarized version of a design called the Dive-XL that followed the Dive-LD. In March, Anduril announced it was among those selected for the Combat Autonomous Maritime Platform Project (CAMP), an extra-large uncrewed underwater vehicle rapid prototyping effort being run by the Pentagon’s Defense Innovation Unit (DIU) and the Navy. Anduril did not say what platform it would be supplying for that project, but used a picture of Ghost Shark to illustrate the announcement.
The U.S. military is already known to have taken advantage of the ongoing conflict with Iran to demonstrate new weapon systems and other capabilities, including uncrewed maritime systems. In June, a Saronic Corsair drone boat conducted a first-of-its-kind at-sea rescue of the crew of a U.S. Army AH-64 Apache attack helicopter that had gone down in the Gulf of Oman. The following month, U.S. forces launched their first known kamikaze USV attack on Iran’s Bandar Abbas Naval Base using explosive-laden Corsairs.
With all this in mind, it is worth noting that the apparent loss of a Dive-LD intact to Iran is still significant, even if the core design is not brand new and if it does not have any especially sensitive mission systems onboard. It is not necessarily ‘exquisite,’ bleeding-edge technology as it is designed to be optionally attritable, but is still an advanced modern system in operational U.S. service now. Insights into its capabilities and limitations would certainly be of interest to Iran and others. What attempts the U.S. military made to recover the Dive-LD are also unknown. However, the fact that it was not destroyed before or while the Iranians were retrieving it points to American forces having completely lost any sense of its location beforehand.
For its part, Iran has long been a collector of foreign military hardware, primarily U.S. and Israeli, including drones of all types. The capture of a largely intact RQ-170 Sentinel in 2011 is the most famous (or infamous) example. The regime in Tehran also regularly works to reverse engineer what it recovers to varying degrees, and has promised to do the same with the Dive-LD. It could also share its latest prize with its own international partners, including Russia and China, for further analysis and exploitation. The Chinese People’s Liberation Army Navy (PLAN) notably has its own very active UUV programs.
On top of all this, the seizure offers propaganda benefits for the Iranian government, which is already making heavy use of the information space to push back against U.S. military and economic pressure.
The current conflict with Iran has only further underscored the important roles that uncrewed maritime platforms are playing in U.S. operations now, which are only set to keep growing as time goes on. As those same operations expand, so will the risks of capture and other losses.
Video emerged on social media of local workers cleaning the carrier. Two of them can be seen on a scaffolding platform, dressed in silver-colored protective clothing, yellow helmets, face shields and black boots, spraying the side of the big ship. You can see that most of the rust, as well as all of the green swath of algae, was removed from the section where they are working.
The camera also pans across the ship, showing the extent of the work still needed.
Those recent viral rust photos/footage of the USS Abraham Lincoln (CVN-72) in Thailand overstated the story.
Yes, the hull looked rough in pictures, but the ship itself was never in question, that's the part the headlines skipped.
It is unclear whether this work had already been scheduled as part of routine maintenance or whether it had been ordered after images of the ship emerged showing its rough condition. The ship was a huge focus of attention even before it got to Thailand.
Interest in the Lincoln flared up anew after it arrived in Thailand due to its condition, as well as intense curiosity about how the crew would fare in a Thai port call after being at sea for so long.
The USS Abraham Lincoln (CVN-72) aircraft carrier arrives at Laem Chabang Port on Sept. 2, 2026 in Si Racha, Thailand. Photo by Thananuwat Srirasant
“It’s terrible. I think they should be ashamed,” John Phelan told members of Congress at a hearing last year, when he was then-nominee for Secretary of the Navy, after being shown pictures of a very worn-looking Arleigh Burke class destroyer, the USS Dewey, during a stopover in Singapore. “Would you want to go on that ship?”
One driving factor in the condition of ships like Lincoln is the operational tempo of deployments, a Navy official noted earlier this year.
“We know what to do, but we choose not to do it,” Mark Lattner, director of the Navy’s Ship Integrity and Performance Engineering, Naval Systems Engineering Directorate, said in January during a panel at the Surface Navy Association’s annual symposium that TWZ attended. “And we choose not to do it because there’s always some other problem I’ve got to fix. I don’t have time. Our corrosion can wait. And so we don’t implement the fixes.”
Finding a solution to the Navy’s rust problem became one of Lattner’s main missions in the wake of the fallout from Trump’s late-night texts to Navy officials demanding answers about the condition of theArleighBurke class guided missile destroyer USS Dewey after he saw pictures of it covered in running rust as it pulled into Singapore last year.
A picture of the USS Dewey covered in ‘running rust’ during a recent port visit in Singapore is shown at the confirmation hearing for Secretary of the Navy nominee John Phelan on January 27, 2025. Senate Armed Services Committee capture
Port calls offer critical time to fix long-standing issues and resupply the ship of pretty much everything you can think of, from jet fuel to food. So it’s no surprise that the Lincoln would be swarmed with support personnel and supplies while much of her crew enjoys being on land once again for a few days.
It’s unclear how long the clean-up work on the Lincoln will last or how much of it will be finished by the time the ship and crew leave port. Either way, from what we have seen so far, it will look much better leaving Thailand than when it arrived.
USNI Newswas first to report on Tuesday that the Japanese, South Korean, and Turkish frigates are included in an ongoing Navy study, citing anonymous sources. The review is in direct response to one of the provisions in a larger memo President Trump sent out last month, titled “Rebuilding the United States Navy and America’s Shipbuilding Industrial Base.” This also comes amid strong opposition in Congress to the basic idea of buying foreign warships for the Navy.
A pair of the Japan Maritime Self Defense Force’s (JMSDF) Mogami class frigates. JMSDF
Per that memo, the Secretary of the Navy (currently Acting Secretary Hung Cao) was directed to “submit a plan to the President … that includes timelines and resourcing requirements, for a new competitive acquisition approach for surface combatants with sufficient inherent capabilities to perform anti‑submarine warfare, surface warfare, and convoy escort duties.” The memo also said the “plan should address meeting the requirements for Consolidated Cargo Replenishment at Sea (CONSOL) Tankers and — separately — Roll-On, Roll-Off Vessels.”
The study could lead to “an international warship competition [that] could include building up to two of the ships in foreign shipyards before transitioning to domestic yards as part of the Trump administration’s push to rapidly expand the fleet, three industry sources familiar with the deliberations confirmed,” according to USNI News‘ report. The outlet also said the Navy declined to “directly address the potential for an open competition for a new frigate” when asked.
The South Korean Navy’s ROKS Chungnam seen during sea trials before its delivery in 2024. HD Hyundai Heavy Industries
The acquisition approach described here is in line with what the Trump administration is currently calling the “Finland Model,” which entails construction of an initial batch of ships overseas before moving further production to yards in the United States. The name comes from a partnership the U.S. and Finnish governments announced last year regarding the construction of new icebreakers for the U.S. Coast Guard. Canada’s Seaspan Shipyards is also involved in that plan.
Broader plans to explore foreign surface combatant designs for the U.S. Navy, and potentially more to acquire one of those ships, were mentioned in the Pentagon’s 2027 Fiscal Year budget request released earlier this year. President Trump, former Secretary of the Navy John Phelan, and other U.S. officials have also openly raised the possibility of cooperation with shipbuilders in Japan and South Korea, specifically, including with regard to surface combatants. USNI‘s report says that the Istanbul class was included in the current review after it came up in discussions between Trump and Turkish officials on the sidelines of the NATO summit in Ankara in July.
Many questions remain, but there are clear signs the Trump administration wants to move in pursuing the acquisition of foreign naval vessels. The particular focus on frigates also aligns with a clear Navy need for new ships in that size class.
Why frigates?
Before exploring the specific designs the Navy is now said to be reviewing, it is worth taking a step back to understand why frigates are so important to the service’s shipbuilding plans, in general. The United States has not technically operated frigates since the retirement of its last Oliver Hazard Perry class type in 2015. The expectation had been that the Freedom and Independence class Littoral Combat Ships (LCS) would fill the resulting gaps. However, those ships struggled for years with a variety of major issues over the years and still have not lived up to their promised potential, despite certain strides having been made in expanding their operational employment in recent years.
A rendering of a now-cancelled Constellation class frigate. USN
A new FF(X) frigate program has since emerged. Through that effort, the Navy is now in line to get ships derived from the U.S. Coast Guard’s Legend class National Security Cutter (NSC), with the goal being to have the first one in the water by 2028. However, those frigates, at least the ones built in the initial tranche, will lack a Vertical Launch System (VLS) and certain other features that were seen as critical for the preceding Constellation class. This has immediately raised questions about the operational utility of these new small surface combatants, asTWZ has previously explored in detail.
A rendering of the US Navy’s future FF(X) frigate. USN
None of this diminishes the Navy’s current desire for new frigates, and more of them, to provide smaller, lower-cost platforms that can be used to bolster larger surface action groups or operate more independently in roles that do not require larger, more capable designs. When fielded in sufficient volume, they can also free up other types of surface combatants for other, higher priority duties or similar help to relieve strain on those fleets.
Today, the Navy’s fleet of Arleigh Burke class destroyers “gets used with a very high demand signal combatant commanders. The Navy can’t operate with only one size of ship,” Rear Adm. Brian Metcalf, the Navy’s Deputy Portfolio Acquisition Executive Maritime for Combatants, said in an official video in June. “The [FF(X)] frigate will fill that gap. They can be used in less contentious waters. They can be used as high-value escorts. There are all kinds of things the frigate can fill the gap for and allow destroyers to execute the high-end mission set.”
With all this in mind, it is not surprising that the Navy would be seeking to further bolster its future frigate fleets on a shorter timetable by leveraging foreign shipbuilders. There are also clear benefits to taking advantage of capable, in-production designs, which leads us to the Mogami, Chungnam, and Istanbul classes.
The Mogami class
Japan’s Mogami class, with its stealthy design characteristics, has long been a standout among modern frigates currently in production globally. The ship is designed as a multi-mission platform with anti-air, anti-surface, anti-submarine, and mine warfare capabilities, the latter of which includes both mine-hunting and mine-laying.
TWZ has covered the ship in detail in the past, writing:
“The original Mogami class design (also known as the 30FFM), the first of which only entered Japanese service in 2022, is already a very modern design with its shape featuring some stealthy characteristics. The 436-foot-long, 53-and-a-half-foot-wide, 5,500-metric-ton displacement frigates have a combined diesel and gas (CODAG) propulsion system that allows for fuel-efficient normal cruising operations and an additional burst of speed in combat. The ships have an active electronically scanned array (AESA) main radar, as well as a host of other advanced sensors and mission systems. One of the Mogami‘s most distinctive features is its NORA-50 UNIted COmbined Radio aNtenna (UNICORN) mast on top of the main superstructure, which contains various antennas. The frigates also have especially futuristic-looking Combat Information Centers (CIC)…”
The Japan Maritime Self Defense Force’s (JMSDF) first-in-class JS Mogami. JMSDF
“Armament-wise, the baseline Mogami class frigate has two four-round launchers for Type 17 anti-ship cruise missiles, a SeaRAM close-in defense system loaded with RIM-116 Rolling Airframe Missiles (RAM), and a five-inch main gun in a turret at the bow. There are also two remote weapon stations, each armed with a .50 caliber machine gun, on top of the bridge for additional protection against close-in low-end threats.”
“The Mogami design was originally slated to feature a 16-cell Mk 41 launch system array, but the seventh ship in the class, the JS Niyodo, which was commissioned in May, was the first to be fitted with it. The first six of these frigates were delivered without this capability, but they are expected to be back-fitted with it in the future. Mk 41 cells on Mogami class frigates are expected to be primarily filled with domestically-developed A-SAM or U.S.-designed RIM-162 Evolved Sea Sparrow Missiles. Four ESSMs can notably be loaded in a single Mk 41 cell.”
The Mogami classfrigates also have a flight deck and hangar designed to accommodate a single Seahawk helicopter. The ships can also deploy uncrewed underwater and surface vessels (UUV/USV), as well as rigid-hull inflatable boats (RHIBs), via a ramp at the stern.
MHI in Japan has also developed an enlarged derivative that is close to 466 feet long, almost 56 feet at its widest, and displaces some 6,200 metric tons. This version also features a 32-cell VLS array, along with an upgraded radar, other improved sensors, and updated mission systems. Last year, the Australian government announced it would be acquiring a fleet of these ships with certain unspecified country-specific features as part of its SEA 3000 program.
A model of the enlarged derivative of the Mogami class. Japan Ministry of Defense
The Australian deal is one of, if not still the most significant foreign arms sale for Japan since the end of World War II. It also helps ensure that the Mogami production line will remain hot for years to come. For the U.S. Navy, sharing a frigate with two of America’s highest-profile allies in the Pacific, and which could therefore be readily serviced in those countries, would be very advantageous.
The Chungnam class (also sometimes referred to as the FFX-III or FFG-III) is the latest frigate for the South Korean Navy, and features a mix of anti-air, anti-ship, and anti-submarine capabilities. The first example entered service in that country in 2024. These ships are just over 423 feet long, approach 49 feet at the widest point in the hull, and displace some 4,300 tons with a full combat load. The design is based on the earlier Daegu class, which was itself an evolution of the precedingIncheon class that traces its roots back to the late 1990s.
As was the case on the Daegu class, the Chungnam class uses combined diesel–electric or gas (CODLOG) propulsion, which offers benefits for power management and efficiency, as well as when it comes to reducing maintenance requirements and operating costs. The design features a prominent integrated mast structure with four fixed-face arrays for the main multi-function AESA radar near the top. The ships have additional radars and other sensors, as well as an electronic warfare suite.
The ROKS seen at the time of its launch. HD Hyundai Heavy Industries
Each one of the Chungnam class frigates has a 16-cell K-VLS array. Domestically developed K-SAAM surface-to-air missiles and Haeseong I anti-ship cruise missiles (also called the SSM-700L or C-Star), as well as K745A1 Hong Sang Eo (Red Shark) vertically-launched anti-submarine rockets, can be loaded into these cells.
The armament package on these ships also includes a five-inch main gun in a turret at the bow, a pair of triple torpedo tubes, and a Close-in Weapon System II (CIWS II) armed with a seven-barrel 30mm Gatling-type cannon.
A look at the CIWS-II, which is part of the full armament package on the Chungnam class frigate. Hyundai WIA
The Chungnam class frigates also have a flight deck and hangar for a single helicopter at the stern.
As it stands now, the South Korean Navy has two Chungnam class frigates in service and has plans to acquire four more over the next few years. The lead ship in the class was built by HD Hyundai Heavy Industries, which is also one of the principal designers of the ship. A different shipbuilder, SK Oceanplant, built the second ship in the class, ROKS Gyeoungbuk, and is now working on the third and fourth examples. Hanwha Ocean is reportedly in line to build the last two ships in the class for South Korea. Hyundai and Hanwha have pitched export designs based on the Chungnam class, with both firms notably in the running to supply new frigates to Thailand.
Hanwha has already been making steady inroads in the shipbuilding industry in the United States, including the acquisition of the Philly Shipyard in Philadelphia, Pennsylvania, in 2024. Hyundai has reportedly been working to do the same. Just last month, Hanwha publicly announced a new $1.2 billion bid to buy out Australian shipbuilder Austal’s U.S. subsidiary, Austal USA. Austal notably built the Independence class LCSs for the U.S. Navy and continues to supply that service with other vessels. Austal subsequently said it was considering the South Korean offer.
The Istanbul class
Turkey’s Istanbul class (also known as the Istif class or just I class), developed under the country’s MILGEM national warship program, is not a design that has typically come up in previous discussions about potential foreign-made frigates for the U.S. Navy. It is described as a multi-role frigate with anti-air, anti-surface, and anti-submarine capabilities. The lead ship in this class, TCG Istanbul, entered Turkish Navy service in 2024.
At around 371 and a half feet long and with a beam of just over 47 feet, as well as a displacement of some 3,000 tons with a full combat load, the Istanbul class is notably smaller than either the Mogami class or Chungnam class. Like the Mogami, it uses CODAG propulsion. The Turkish design is understood to have leveraged lessons learned from the Project GENESIS program to upgrade the country’s second-hand ex-U.S. Navy Oliver Hazard Perry class frigates, as you can learn more about here.
TCG Istanbul is armed with a 16-cell MiDLAS VLS array, with past reports saying it is primarily configured to fire Hisar short-to-medium-range surface-to-air missiles. However, just in August, it was revealed that the second ship in the class, the future TCG Izmir, which is undergoing sea trials now, has a new 16-cell version of MiDLAS with visibly longer cells. This would allow the ship to fire larger weapons vertically, such as the Siper medium-range surface-to-air missiles, Atmaca anti-ship cruise missiles, and/or Gezgin land-attack cruise missiles. MiDLAS is a scalable VLS design developed in Turkey as an alternative to the U.S.-made Mk 41.
The future TCG Izmir with its noticeably larger VLS array in front of the main superstructure. Anadolu Shipyard
The initial Istanbul class design already had four deck-mounted launchers that can be loaded with up to 16 Atmaca missiles, in total. The frigates also have a 76mm cannon in a turret on the bow, a Gokdeniz CIWS with a twin-barrel 35mm cannon, two 25mm cannon-armed remote weapon stations, and a pair of twin torpedo tubes.
The main sensor on the Istanbul class is a rotating AESA radar mounted on top of the ship’s main integrated mast structure. It has additional radars and other sensors, as well as electronic support measures and electronic countermeasures systems.
The Istanbul class design also features a flight deck and hangar at the stern, sized around the Seahawk helicopter.
An infographic offering a general overview of the Istanbul class’ capabilities. STM via X
As mentioned, the second Istanbul class frigate for the Turkish Navy is now in sea trials, and the country plans to eventually acquire eight of these warships in total. They are being built through several shipyards in Turkey. Last year, Turkey’s TAIS Shipyards also secured a contract to build at least two Istanbul class frigates for Indonesia.
Growing U.S. roadblocks to any foreign warships
Much remains to be seen about how the U.S. Navy might proceed with the acquisition of new frigates, or any other naval vessels, via foreign shipbuilders. Whether any other relevant, in-production designs are being considered, or could be in the future, is unknown. USNI News‘ report says the current study is scheduled to wrap up in November.
Furthermore, what the Navy might want to do could well turn out to be moot. Members of Congress on both sides of the political aisle have been very vocally pushing back on any plans to acquire foreign warships amid concerns about negative impacts on the U.S. shipbuilding industry.
Current U.S. law would already require the Trump administration to issue a national security waiver to pursue foreign-made naval vessels. A draft of the annual defense policy bill, or National Defense Authorization Act (NDAA), for the 2027 Fiscal Year now making its way through the Senate would eliminate the ability to issue such a waiver. In June, members of the House Armed Services Committee separately moved to outright block any spending on foreign-built warships in a separate draft NDAA.
The aforementioned Finland Model, as outlined in Trump’s August memo, is clearly intended to try to assuage Congressional concerns. Under the stated plan, foreign shipbuilders would be required to make major investments in U.S. shipbuilding enterprises and hire American workers as part of any future contract, even if an initial tranche of vessels is built overseas.
A rendering of one of the future Arctic Security Cutter icebreakers the US Coast Guard is set to acquire in part through a shipyard in Finland. Seaspan
“The Administration strongly opposes section 1025, which would prohibit the use of funds for procurement of initial battle force ships to be built in a foreign shipyard, especially while, in accordance with the ‘Finland Model’ first employed with the Coast Guard’s medium icebreaker program, long-term investments are being made in an American brown or greenfield shipyard,” the White House’s Office of Management and Budget (OMB) wrote in a statement of Administration Policy in July, specifically in response to provisions in the the House’s NDAA draft. “This prohibition fails to seriously address the challenges posed by current shipbuilding backlogs across six major programs in our ‘prime’ shipyards.”
This latter point here speaks to an already worrisome and still-widening gap between U.S. shipbuilding capacity and that of chief global competitor China. The U.S. government has tried to take steps in recent years to revitalize the American side of the equation, but workforce retention and other factors have continued to present serious hurdles. There are additional concerns now about how the addition of work on the Trump class battleship program will affect America’s naval shipbuilding ecosystem, which the Trump administration has separately pushed back on.
An unclassified Office of Naval Intelligence briefing slide from circa 2023 underscoring the disparity between U.S. and Chinese naval shipbuilding capacity. ONI
Continuing U.S. shipyard capacity and quality issues raise their own questions about the viability of the Finland Model. The construct inherently limits the U.S. government’s ability to make use of yards overseas and is heavily contingent on the shipbuilding industry in the United States expanding at a rate where it will be able to absorb the additional production demands. With the naval shipbuilding deficit already becoming extremely problematic, buying examples of relevant classes with minimal changes and having them built where production is already established could arguably be the priority, especially in light of the failures of the LCS and Constellation programs.
Ensuring that any U.S.-specific changes to the design are minimal will also be critical for any such plan to be successful. As mentioned, the Constellation class was undone in large part due to a near-constant stream of changes ordered by the Navy, which negated the benefits of choosing a derivative of an in-production design. The service has stressed its intention to avoid any similar pitfalls with its existing FF(X) frigate program, which also has to be factored into the larger domestic shipyard capacity question.
“The President has directed the Navy to aggressively increase domestic shipbuilding capacity, including leveraging the proven shipbuilding skills and industrial expertise of our allies,” Navy Capt. Ron Flanders said in a statement on Tuesday, according to USNI News. “We are actively developing options to fulfill the President’s intent to deliver ships faster while ensuring long-term investment, technology transfer, and workforce expansion within United States shipyards.”
Signs are certainly growing that the Navy is moving closer to kicking off a formal process to acquire foreign-designed warships, which could include Mogami, Chungnam, and/or Istanbul frigates, to help grow its fleets, especially in the face of growing challenges posed by China.
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U.S. NAVY UPDATE: U.S. Navy and Royal Navy Successfully Test Fire Torpedo from Unmanned Undersea Vehicle
WASHINGTON – On September 13, 2026, the U.S. Navy and the Royal Navy successfully conducted the proof-of-concept launch of an exercise U.S. Mk 48 Heavyweight Torpedo… 
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