Archive · 13 Nov 2025
Australia's AUKUS Submarine Base to Connect to New Undersea Internet Cables
Imagine Australia is building a super-important base for submarines near its west coast.
To make sure this base can talk to other places super fast, like sending secret messages or big computer information, they are connecting it to new underwater internet cables.
These cables are like giant underwater highways for data, planned by Google and another company.
One cable will connect Australia's east and west coasts and have a special stop right at the submarine base.
Other cables will go to Africa and Asia.
This helps the military stay connected, improve its computer smarts (AI), and watch what other countries are doing.
However, some people are worried about how these cables might affect sea animals and the environment, so officials are looking into that.
Australia's AUKUS submarine base, HMAS Stirling, is being connected to new undersea internet cables.
Google and SUBCO are planning high-capacity cables to connect Australia's coasts, and extend to Africa and Asia.
The new cables aim to boost Australia's digital resilience and support its artificial intelligence (AI) ambitions.
The HMAS Stirling base will house U.S. Virginia submarines from 2027, enhancing surveillance in the Indian Ocean.
Environmental assessments are underway for some cable projects due to concerns for marine species.
- Who
- Alphabet's Google, SUBCO, Australia's AUKUS submarine fleet base (HMAS Stirling), U.S. Navy, and Australian military
- What
- Connecting Australia's AUKUS submarine base and its vicinity to three new undersea internet cables, bolstering digital resilience and AI ambitions.
- When
- From 2027 for submarine deployment; cable connections are planned and under assessment.
- Where
- HMAS Stirling naval base on Australia's west coast, with cables spanning the Indian Ocean to Africa and Asia, and connecting Australia's coasts.
- Why
- To enhance digital resilience, support Australia's AI ambitions, step up surveillance of Chinese submarine activity, and provide secure connectivity between allies and military installations.
Military & Security Focus
Environmental Concerns
Cable Landing Locations
Military & Security Focus
Documents indicate a direct branch to HMAS Stirling naval base, while public materials only mention a landing in Perth city, 60 km north. Google states landing facilities will be inland in an industrial zone, declining further details.
Environmental Concerns
Google's environmental application for a separate Pacific Ocean cable cites 'geostrategic shifts' and Quad investments as context for projects.
Infrastructure Development
Military & Security Focus
New routes by SUBCO and Google are critical for delivering capacity and resilience for Australia's AI ambitions and as a secure hub for the region, with potential strategic advantages for operating drones and autonomous systems.
Environmental Concerns
Australia's environmental regulator has suspended assessment of Google's Western Australian cables to consider 'matters of national environmental significance, including threatened and migratory marine species'.
- Naval Base
- HMAS Stirling, Western Australia
- Submarine Deployment
- Four U.S.-commanded Virginia submarines from 2027
- Cable Providers
- Google and SUBCO
- Planned Cable Routes
- Indian Ocean to Africa and Asia, Australia's east and west coasts, and a branch to HMAS Stirling
- US Personnel Arrival
- Around 1,000 U.S. Navy personnel expected from next year
- Previous Project
- SUBCO completed Australia-Oman cable in 2022, partly funded by Pentagon for a branch to Diego Garcia