Australia Pushes P-8A Poseidon Beyond Maritime Patrol With AGM-158C Long-Range Anti-Ship Strike Capability.

Australia has demonstrated that its P-8A Poseidon can launch the AGM-158C Long-Range Anti-Ship Missile, with the Department of Defence confirming on 11 September 2026 that an RAAF aircraft successfully struck a target with LRASM during RIMPAC 26. Although the combination is not yet operational, it could give Australia a long-range platform able to find, track, and attack hostile warships across vast areas of the Indo-Pacific.

The test moves the P-8A beyond its established maritime patrol and anti-submarine warfare role by demonstrating a direct long-range anti-ship strike capability. Pairing the aircraft’s maritime surveillance sensors and endurance with LRASM could expand Australia’s ability to project sea-denial firepower at distance while complicating an adversary’s naval operations.

Related Topic: Australian P-8A Poseidon Takes Key Role in Four-Nation Indo-Pacific Undersea Warfare Exercise

Australia has demonstrated a major expansion of the RAAF P-8A Poseidon’s combat potential after the maritime patrol aircraft successfully fired an AGM-158C LRASM at RIMPAC 26, pointing toward a future long-range anti-ship strike role across the Indo-Pacific (Picture Source: Australian Department of Defence / Edited By Army Recognition Group)

On 11 September 2026, Australia announced that the Royal Australian Air Force had achieved initial operational capability with the AGM-158C Long Range Anti-Ship Missile and AGM-158B JASSM-ER on the F/A-18F Super Hornet. Yet the Australian Department of Defence also confirmed a potentially more consequential maritime development: during RIMPAC 26, an RAAF P-8A Poseidon successfully fired an LRASM and hit its target. The distinction is important, the P-8A has not been declared operational with LRASM, but the test points toward a capability that could fundamentally alter how Australia finds, tracks and engages hostile naval forces across the Indo-Pacific.

Why the Poseidon Could Be More Consequential for Maritime Strike

The Super Hornet gives Australia a fast and highly capable tactical platform for delivering long-range weapons, but the Poseidon brings something different: persistence. The P-8A is designed to remain over vast maritime areas for hours, with Boeing specifying a mission radius beyond 1,200 nautical miles while retaining more than four hours on station. The RAAF lists a range of around 7,500 kilometres and confirms compatibility with KC-30A aerial refuelling. Against moving naval targets, that endurance is part of the targeting solution. A warship travelling at 25 knots can move roughly 46 kilometres in one hour, meaning that contacts detected several hours earlier may no longer be where previous intelligence placed them. The ability to remain in the operating area, revisit contacts and continuously refine the maritime picture gives the P-8A a different value from a fighter arriving primarily to deliver weapons.

That persistence becomes more significant when combined with the Poseidon’s mission systems. The P-8A already integrates maritime-surveillance radar, electro-optical sensors, electronic-support measures, acoustic processing and extensive communications, while performing anti-submarine warfare, anti-surface warfare and intelligence, surveillance and reconnaissance missions. LRASM creates the potential to compress several elements of the maritime kill chain (finding, identifying, tracking, targeting and engaging a surface threat) across fewer platforms. External sensors and command networks will remain essential, but the aircraft observing a naval formation can potentially also become the aircraft that attacks it. This creates an additional dilemma for an adversary: a detected P-8A may be collecting intelligence, passing targeting data to another shooter or carrying a long-range anti-ship weapon itself. The result is greater uncertainty over where and when an Australian maritime strike could originate.

From Harpoon to LRASM: changing the geometry of maritime strike

The Poseidon is already an armed anti-surface platform. Australia equips the aircraft with the AGM-84 Harpoon, and an RAAF P-8A fired its first Harpoon during RIMPAC 2018. But LRASM represents more than a simple increase in range. Boeing gives Harpoon Block II a range exceeding 67 nautical miles, or about 124 kilometres, while Australia states that LRASM can engage well-defended maritime targets at ranges beyond 370 kilometres. LRASM also incorporates low-observable features, a multi-modal sensor suite, a weapon data link and semi-autonomous guidance designed for operations in heavily contested electronic environments. Harpoon allows the Poseidon to attack a ship; LRASM potentially enables it to threaten a more sophisticated naval formation while remaining considerably farther from that formation’s immediate defensive envelope. The shift is as much about survivability and engagement geometry as it is about distance.

RIMPAC 26 demonstrated that this transition is moving beyond theory. Australian Defence said the exercise included dual LRASM launches by US Navy and RAAF maritime patrol and reconnaissance aircraft and described the event as the first employment of LRASM by an Australian P-8A. The 11 September announcement subsequently confirmed that the Australian missile hit its target. A live firing of this kind validates far more than the missile itself: it exercises mission planning, weapon preparation, aircraft integration, targeting procedures, communications, loading and launch processes inside a complex multinational environment. Canberra has not declared P-8A/LRASM initial operational capability, the IOC announced on 11 September applies to LRASM and JASSM-ER on the F/A-18F, but the RIMPAC firing is clear evidence that Australia is maturing the Poseidon toward a substantially expanded maritime-strike role.

A wider maritime kill network for the Indo-Pacific

The development also comes at an important moment in the maturation of Australia’s P-8A force. Australia completed its planned 14-aircraft Poseidon fleet in May 2026, increasing availability and the capacity for sustained maritime operations. These aircraft already operate across strategically important parts of the Indo-Pacific, including deployments from Malaysia for maritime-domain-awareness missions covering the Northeast Indian Ocean and South China Sea, as well as operations involving the Philippines and large multinational exercises such as RIMPAC. This does not mean Australia would automatically deploy LRASM-armed Poseidons from those locations, which would depend on political, logistical and basing arrangements. What it does mean is that the aircraft being prepared for long-range maritime strike already operates across many of the sea lanes, chokepoints and operating areas that matter most to Australian defence planning.

The greater strategic value, however, would come from integrating the P-8A into a distributed strike network alongside F-35As, F/A-18Fs, E-7A Wedgetails, surface combatants, submarines and allied forces. A target detected by one sensor could be tracked by another and engaged by whichever platform is best positioned, while the Poseidon itself could alternate between sensor and shooter roles. Its limitations remain important: the P-8A is a large, non-stealthy aircraft and would be vulnerable inside dense fighter and surface-to-air missile coverage. Its greatest value with LRASM would come from remaining outside the most dangerous threat rings while exploiting its endurance, sensors and connectivity to support or execute standoff attacks. That is where the capability aligns most closely with Australia’s National Defence Strategy and its emphasis on expanding long-range strike to deliver deterrence through denial: not by making every aircraft a penetrating strike platform, but by creating more distributed, persistent and unpredictable ways to hold hostile naval forces at risk.

Australia’s 11 September announcement formally establishes a new long-range strike capability for the F/A-18F Super Hornet, but the RIMPAC 26 P-8A firing points toward a broader transformation. A Poseidon able to remain airborne for hours, search immense areas of ocean, classify and track naval contacts, exchange targeting information across a joint force and ultimately launch a survivable anti-ship missile from more than 370 kilometres away represents more than another aircraft carrying LRASM. It signals the gradual convergence of Australia’s maritime surveillance and long-range strike architectures. For an Indo-Pacific increasingly defined by long-range sensors, contested sea lanes and distributed missile forces, the strategic message is significant: Australian Poseidons may increasingly be not only the aircraft watching the maritime battlespace, but platforms capable of acting directly on what they find.

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Written by Teoman S. Nicanci – Defense Analyst, Army Recognition Group

Teoman S. Nicanci holds degrees in Political Science, Comparative and International Politics, and International Relations and Diplomacy from leading Belgian universities, with research focused on Russian strategic behavior, defense technology, and modern warfare. He is a defense analyst at Army Recognition, specializing in the global defense industry, military armament, and emerging defense technologies.