Australian Navy Fields Ghost Shark XL-AUV as New Maritime Autonomous Unit Enters Service.

Australia activated its Maritime Autonomous Systems Unit on April 14, 2026, bringing the Ghost Shark program into operational service and accelerating its shift to uncrewed naval warfare. The move delivers deployable autonomous strike and surveillance capabilities, strengthening Australia’s deterrence posture across the Indo-Pacific.

The Royal Australian Navy’s MASU consolidates Project SEA 1200 programs, integrating Ghost Shark, Bluebottle, and Speartooth into a dedicated force with its own control center and deployable teams. The unit is built to move fast, turning prototypes into operational assets, developing doctrine, and pushing autonomous systems into real-world missions, marking Australia’s transition from trials to frontline capability.

Related topic: Australian Navy to receive its first Anduril Ghost Shark XL underwater drone in January 2026.

Australia’s new Maritime Autonomous Systems Unit shows the Royal Australian Navy is moving from testing to operational use of Ghost Shark, Bluebottle and Speartooth, turning uncrewed maritime systems into a real force element for persistent surveillance, undersea strike and distributed deterrence (Picture source: Australian MoD).

MASU sits under Project SEA 1200, which includes an Uncrewed Systems Control Centre and a Deployable Vehicle Team, and is explicitly responsible for accelerating the development, integration, and operational employment of uncrewed maritime systems. In other words, the name marks the institutionalization of a new combat function, not simply the branding of a niche experiment.

The significance of changing the name is therefore doctrinal as much as administrative. A named unit becomes easier to resource, train, man, test, and task; it acquires an identity inside the fleet, and that identity shapes how commanders plan to fight with it. MASU’s responsibilities for doctrine development, experimentation, employment, training, and test and evaluation show that Australia is building the command architecture needed to turn autonomous platforms into deployable capability rather than keeping them as technology demonstrators. The announcement also aligns with Defence’s wider push to bring minimum viable capabilities into service quickly within an integrated force.

The program’s development path makes that transition visible. Ghost Shark began in 2022 as a co-funded effort between the Royal Australian Navy, Defence Science and Technology Group, and Anduril Australia; three prototypes were contracted, with the first delivered in April 2024, a year ahead of schedule, and the whole effort was later absorbed into ASCA as Mission Zero to speed its transition into service. Canberra then approved a A$1.7 billion five-year contract in September 2025 for delivery, maintenance, and continued development of dozens of Ghost Shark vehicles, and Defence stated on 15 April 2026 that the Navy has now taken delivery of Ghost Shark autonomous underwater vehicles. That sequence shows a program moving from concept to prototype, from prototype to production, and now from production to fleet integration.

Ghost Shark is the high-end striking arm of this emerging architecture. Australia has publicly described it as an extra-large autonomous undersea vehicle, with Defence noting that XL-AUVs of this class are typically 10 to 30 meters long, able to remain at sea undetected for very long periods, carry various military payloads, and cover very long distances. Ministers have repeatedly described Ghost Shark as stealthy, long-range, and capable of intelligence, surveillance, reconnaissance, and strike, while the September 2025 contract specifically funded ongoing development of the platform, its payloads, and supporting production system.

What is notable is that Australia still has not disclosed the precise armament fit. That omission is deliberate: publicly, officials have been careful not to specify whether Ghost Shark’s strike function is delivered through mines, torpedo-like payloads, seabed effectors or some other modular weapon package, but they have said enough to show the vehicle is intended to carry kinetic effect, and Anduril has said the system will continue to evolve with new payloads and new weapons. MASU’s motto, “We Wait, We Strike,” matters here because it compresses the concept of operations into four words: covert persistence first, weapon release second. The weapon is therefore best understood not as a fixed loadout, but as a modular offensive mission package embedded within a stealthy ISR platform.

Bluebottle gives MASU a very different but complementary layer of capability. Developed by Ocius with Navy support, it is a renewable-energy uncrewed surface vessel powered by solar, wind, and wave energy, able to stay at sea for months, operate at around 5 knots, launch from a boat ramp or ship, and carry a 300 kg modular payload with around 100 to 120 watts of average payload power. Ocius also highlights its variable-depth sensor arrangement, networked operation, and “human on the loop” control philosophy, while Defence says Bluebottle contributes persistent surface and sub-surface surveillance and, after the March 2026 A$176 million contract for 40 more boats, will expand the Navy’s operational fleet to 55 vessels.

Speartooth fills the middle tier between a renewable surface scout and a larger stealth strike platform. Public details remain limited, but C2 Robotics describes it as a modular, rapidly reconfigurable, large uncrewed underwater vehicle built for long-range, long-duration operations, with common command-and-control, direct propeller propulsion, variable-buoyancy propulsion, and an emphasis on manufacturing scalability and low-cost fielding. That combination suggests Speartooth is valuable not because it duplicates Ghost Shark, but because it gives MASU a cheaper and more numerous undersea asset for scouting, decoy work, seabed surveillance, payload delivery, or distributed sensing in areas where commanders would prefer not to commit a higher-value XL-UUV. Its inclusion in AUKUS Pillar Two exercises alongside Ghost Shark and Bluebottle reinforces that layered logic.

Australia needs these systems because its maritime problem is fundamentally one of geography, scale, and warning time. The 2024 National Defence Strategy directs the ADF to deter any adversary’s attempt to project power through Australia’s northern approaches, protect the country’s economic connection to the region and the world, and contribute with partners to collective Indo-Pacific security. Defence’s own science organization has warned that the undersea environment is becoming more congested and contested, and that the ADF needs integrated surveillance systems and autonomous platforms that can provide persistent coverage over wide expanses of ocean for long periods. Bluebottle’s long-endurance surveillance role, Ghost Shark’s covert ISR-strike function, and Speartooth’s scalable undersea utility map directly onto that requirement.

How they will operate is equally important. MASU’s control center and deployable team are designed to let the Navy deploy and control autonomous systems from any wharf location in the world, while senior Australian officials have said Ghost Shark can operate from shore, from surface vessels, and from containers around the Australian mainland. That creates tactical flexibility: Bluebottles can maintain a wide-area maritime watch, cueing anomalies and building a sensor picture; Speartooth can investigate, track, or seed distributed payloads in contested waters; Ghost Shark can then penetrate deeper, remain hidden longer, and hold high-value targets or sea-space at risk. In practical terms, MASU is the enabling headquarters for a hybrid crewed-uncrewed force in which submarines, frigates, maritime patrol aircraft, and autonomous vehicles share sensing and effects rather than operating in separate lanes.

The strategic payoff extends beyond fleet tactics: MASU is explicitly tied to AUKUS Pillar Two and will serve as the Navy’s focal point for doctrine, experimentation, and allied collaboration in maritime uncrewed systems. That makes the naming meaningful in alliance terms as well: it gives Australia a standing organization through which it can test concepts, absorb software and payload improvements faster, and contribute sovereign systems to trilateral capability development. Just as important, Ghost Shark and Bluebottle are both being framed by Canberra as sovereign industrial programs, with local supply chains, local production, and export potential, which means MASU is also a mechanism for converting industrial investment into operational mass.

Taken together, the naming of MASU shows Australia has crossed an important threshold. It is no longer only proving that it can build advanced uncrewed maritime systems; it is building the organization that will absorb them, fight them, and sustain them. The real story is that Ghost Shark’s name, Bluebottle’s fleet expansion, and Speartooth’s integration now sit inside a formal unit whose purpose is to turn autonomy into persistent ISR, survivable strike, distributed maritime surveillance, and lower-risk undersea warfare. In a strategy built around denial, distance, and deterrence, that is a force design becoming operational reality.

Written by Evan Lerouvillois, Defense Analyst.

Evan studied International Relations, and quickly specialized in defense and security. He is particularly interested in the influence of the defense sector on global geopolitics, and analyzes how technological innovations in defense, arms export contracts, and military strategies influence the international geopolitical scene.