For the first time in decades, the United States is developing a brand-new long-range weapon designed to kill submarines from the deck of a surface warship. And it is not doing it alone. Under the AUKUS security pact, the U.S., United Kingdom, and Australia are jointly pursuing what they call the Long Range Anti-Submarine Warfare Weapon, or LRAW, a missile or rocket that would launch from a standard vertical launch cell and deliver a lightweight torpedo to a submarine target well beyond the reach of anything in the current fleet arsenal.
The program is one of the most tangible military-industrial results to emerge from AUKUS since the trilateral partnership was announced in 2021. It also represents a striking admission: the world’s most powerful navy has gone a generation without fielding a new long-range ship-launched anti-submarine weapon, even as adversary submarine fleets have grown quieter, more numerous, and more capable.
What the UK procurement filing reveals
The clearest public evidence of the LRAW program comes from a formal request for information published by the UK Royal Navy through Britain’s Contracts Finder portal. The filing describes a missile or rocket system designed for launch from a Mk 41 strike-length vertical launch cell carrying a torpedo payload. Critically, the document specifies that the weapon must accept targeting cues from both organic sensors, such as a ship’s own sonar, and third-party sources, meaning allied submarines, maritime patrol aircraft, underwater drones, or seabed sensor networks could all feed it target data.
That sensor-agnostic requirement matters. It means the weapon is being designed from the outset for networked, multi-domain warfare rather than being tethered to a single ship’s sonar picture. In procurement terms, a request for information is an early step, not a contract award. But the specificity of this one, down to the launcher type, payload class, and cueing architecture, signals that at least one AUKUS partner has moved well past concept studies and into active market engagement with defense industry.
The Mk 41 VLS is the standard vertical launcher aboard U.S. Navy cruisers and destroyers, as well as allied warships including the Royal Navy’s Type 26 frigates and the Royal Australian Navy’s future Hunter-class vessels. Building the LRAW around that cell size means the weapon could deploy across dozens of allied surface combatants without major ship modifications, a powerful incentive for all three navies.
A gap the Navy has lived with for years
The U.S. Navy does have a ship-launched anti-submarine weapon today: the RUM-139 Vertical Launch ASROC, a rocket-boosted torpedo that fits inside a Mk 41 cell. But VL-ASROC was designed in the late Cold War era and has a range of roughly 22 kilometers, a distance that modern diesel-electric and nuclear submarines can exploit by simply staying farther away or operating in acoustically cluttered coastal waters where detection ranges shrink.
For standoff anti-submarine attack at longer ranges, the Navy has relied heavily on helicopters and P-8A Poseidon maritime patrol aircraft dropping torpedoes. Those platforms are effective but limited by flight hours, weather, and the number of airframes available in a given theater. A VLS-launched weapon with significantly greater range would restore a capability that surface combatants have effectively lacked, letting a destroyer or frigate engage a submarine contact at distances that today require dispatching an aircraft.
Whether the LRAW is meant to complement airborne torpedo delivery or eventually absorb some of those missions is not addressed in any available public document. But the operational logic is clear: in a contested environment where aircraft may face their own threats, having a ship-based long-range option adds a layer of redundancy that fleet commanders do not currently have.
Parallel AUKUS work on torpedoes and undersea drones
The LRAW effort does not exist in isolation. A Pentagon statement on AUKUS Pillar II and Exercise Maritime Big Play confirmed that the three nations are expanding the launch and recovery of uncrewed underwater systems from torpedo tubes aboard current UK and U.S. submarines. The same release confirmed work to integrate the UK-made Stingray lightweight torpedo onto P-8A Poseidon aircraft, a step that would give American and Australian patrol squadrons access to a British torpedo variant and push munitions interoperability from policy language into operational reality.
The Stingray integration and the LRAW program share a common thread: both center on lightweight torpedoes as the terminal kill mechanism against submarines. If the LRAW’s payload turns out to be a Stingray derivative or a jointly developed successor, the three navies could converge on a single torpedo standard. That would simplify logistics, training, and maintenance across three countries and shorten the chain from detection to engagement, because commanders could treat torpedo stocks as a shared resource rather than three separate national inventories.
On the broader AUKUS architecture, the trilateral SSN-AUKUS submarine program provides strategic context. That effort, centered on a conventionally armed, nuclear-powered submarine based on a UK design with American propulsion and combat-system technology, commits all three governments to decades of undersea industrial cooperation. Australia’s phased acquisition pathway begins with Australian crews training on U.S. Virginia-class boats before SSN-AUKUS hulls enter service. A separate trilateral agreement on naval nuclear propulsion, tabled in the Australian Parliament, formalizes the legal framework governing technology transfer and industrial participation. That kind of political scaffolding makes a shared long-range ASW weapon not just plausible but operationally logical.
Hard questions that remain unanswered
For all the specificity in the UK filing, major questions remain open. No prime contractor has been named. No production timeline or unit cost has been disclosed. Whether the U.S. Navy will co-fund development or adopt a weapon designed primarily by British industry is not addressed in any available public document. Direct statements on Australian industrial participation in the LRAW effort are limited to the single Pentagon release and lack detail on workshare, test schedules, or target dates for initial operating capability.
The sensor-cueing requirement raises its own set of challenges. Organic sensors on a surface ship, such as hull-mounted or towed-array sonar, have limited effective range against modern quiet submarines, especially in complex littoral waters. Third-party cueing from submarines, underwater drones, or seabed arrays could extend engagement range dramatically, but the data links, classification algorithms, and command authorities needed to fire a weapon based on another platform’s contact are technically complex and politically sensitive. No public document describes how targeting data would flow from a remote sensor to a ship’s combat system fast enough to launch before the contact fades, or which nation would hold final release authority when the cueing platform and the firing platform belong to different navies.
Industrial and regulatory hurdles also loom. A weapon combining U.S., UK, and Australian technology will have to navigate export-control regimes and intellectual-property rules originally written for strictly national programs. The AUKUS framework is intended to ease some of those barriers, but how smoothly those arrangements will extend to a complex, software-intensive weapon, particularly one that may draw on classified sensor-fusion algorithms or proprietary seeker technologies, is far from settled.
What this signals about AUKUS and undersea warfare
Taken together, the available evidence points to a clear conclusion: AUKUS is beginning to move from high-level strategy into specific weapons programs, and the LRAW appears to be one of the first visible products of that shift. The convergence of a defined requirement for a VLS-launched torpedo carrier, parallel work on common lightweight torpedoes, and a long-term trilateral submarine program all point toward a shared vision of how the three navies intend to fight undersea wars in the 2030s and beyond.
The precise industrial shape, cost, and deployment timeline of the LRAW remain uncertain as of mid-2026. But the direction is now visible in the public record: interoperable, networked anti-submarine capabilities spanning ships, submarines, aircraft, and unmanned systems, built by three allied nations that have decided the undersea domain is too important and too dangerous to tackle alone.
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*This article was researched with the help of AI, with human editors creating the final content.
