Australia has shown three payloads for Anduril's Ghost Shark extra-large uncrewed submarines: sea mines, a swarm of Altius-600 loitering munitions and logistics supply caches. One vehicle could covertly lay about a dozen mines, according to the report. Canberra is spending A$1.7 billion (US$1.2 billion) on a fleet of undisclosed size, and torpedo and electronic-warfare payloads are reportedly in development.