Telling the Adversary Just Enough: Ghost Shark and Deterrence by Disclosure
On 19 October, Defence Industry Minister Pat Conroy revealed three capabilities of the Ghost Shark extra-large autonomous underwater vehicle: laying sea mines, launching Altius aerial drones, and carrying underwater supplies. In a new piece for The Strategist, Tom Saxton and Morgan Saletta of the University of Melbourne’s Hunt Laboratory read the announcement as a deterrence signal. Australia is publicizing what Ghost Shark can do while withholding how, where, and when it would be used.
Conroy said openly that the point was to speak to potential adversaries as well as the Australian public. The authors argue that the uncertainty is the weapon. Ghost Shark ships in a container and can launch from a wharf or a small vessel, so an adversary cannot easily bound where it might appear. Up to 12 mines threaten chokepoints and harbors without risking crewed ships. Altius loitering munitions can reconnoiter or strike targets more than 100 km inland. Conroy also pointed to strike reach of thousands of nautical miles, which the authors read as an out-and-back range of at least 4,000 nautical miles.
The supply caches. The authors note that this mission got the least explanation. Defence confirmed that supplies can be stored underwater and recovered later, but Conroy would not say how they might be used. The authors suggest the volume would not support a large force ashore. It could support clandestine operations, such as discreetly resupplying dispersed allied and partner forces without an overt Australian presence. They are clear that this is speculation. They also make a sharp point about what it does to an adversary’s planning: the question becomes not only where Australia could strike, but where it could sustain operations unseen.
The Pillar Two link. Conroy confirmed that the newly revealed payloads will be offered as options for AUKUS Pillar Two. Partners would not need to buy Ghost Shark itself, because common payloads and enabling systems could carry Australian technology into allied undersea craft of other designs. That makes Australia a shaper of allied design, with export and industrial cooperation potential beyond AUKUS.
Why it matters for the kill web. The strike and mine-laying story is familiar. The supply cache is where the kill web meets the sustainment problem under the sea. A node that can pre-position fuel, munitions, or sensors in contested water changes how dispersed forces stay in the fight. The authors raise it only as speculation, but it deserves more attention than it received.
Read the full piece: Mines, drones, supplies: Australia lets adversaries know what Ghost Shark can do (The Strategist, 30 October 2026).