Cable Failures Under Scrutiny

Two critical undersea telecommunications cables off the coast of Perth, Western Australia, have reportedly suffered shunt faults under circumstances described as suspicious. The incidents occurred in close proximity and with alarming simultaneity, leading Subco CEO Bevan Slattery to suggest an external cause and call for an Australian Federal Police (AFP) investigation.

Slattery stated that the faults occurred "straight after each other and in close proximity," a pattern he finds highly irregular for typical cable failures. Compounding the suspicion, a vessel was reportedly passing over the affected area at the exact time the disruptions took place. This confluence of events has shifted the focus from natural causes or equipment failure to potential deliberate interference.

Undersea cables are the backbone of global internet and telecommunications infrastructure, carrying the vast majority of international data traffic. Failures, whether accidental or intentional, can have significant repercussions, including widespread internet outages, disruptions to financial markets, and impacts on national security. The specific cables affected and the exact nature of the services they support have not been fully disclosed, but any interruption to such critical infrastructure in a major economic hub like Perth is a serious concern.

The Nature of Undersea Cable Faults

Undersea cables are robust, typically laid on the seabed or buried in trenches, and are designed to withstand significant environmental pressures. However, they are not immune to damage. The most common causes of damage include:

  • Fishing Trawlers: Dragging nets across the seabed can snag and break cables.
  • Anchors: Ships dropping anchor can also cause significant damage.
  • Seismic Activity: Earthquakes and underwater landslides can disrupt cable routes.
  • Equipment Malfunction: While less common for catastrophic failures, internal hardware issues can occur.
  • Shark Bites: Though often sensationalized, sharks have been known to bite cables, though this typically causes minor disruptions rather than complete outages.

The description of faults occurring "straight after each other and in close proximity" is atypical for most of these common causes. Natural events like seismic activity would likely affect a broader area or occur sequentially over a longer period. Accidental damage from a single vessel's anchor or fishing gear would typically result in one distinct fault, not two simultaneous or near-simultaneous ones in the same vicinity. This points towards a deliberate act or a highly unusual, coordinated set of accidental events.

A shunt fault, specifically, is a type of electrical fault that creates a low-resistance path to ground. In a subsea cable, this can result from physical damage that exposes the conductive core or insulation breakdown, leading to signal loss or complete service interruption. Repairing such faults requires specialized vessels and equipment, often taking days or weeks to mobilize and execute, leading to prolonged service disruptions.

Implications of Suspicious Damage

The involvement of a vessel in the vicinity at the time of the incidents is a critical piece of information. While accidental entanglement with an anchor or fishing gear is possible, the CEO's emphasis on the timing and proximity of the faults suggests a higher degree of concern. If the damage is indeed found to be intentional, it represents a significant threat to Australia's digital infrastructure and potentially its national security. The AFP's involvement signals the seriousness with which these events are being treated by authorities.

Australia relies heavily on undersea cables for its international connectivity. Disruptions can impact everything from everyday internet browsing and video streaming to critical business operations, financial transactions, and government communications. The economic cost of such outages can be substantial, measured in millions of dollars per day, depending on the scale of the affected services and the duration of the outage.

The fact that the incidents happened off the coast of Perth is also significant. Perth is a major gateway for internet traffic between Australia and Asia, as well as a key hub for Western Australia's resource sector, which is heavily reliant on digital communication for operations and data transmission. Any disruption here has a cascading effect.

Global Context and Precedent

Damage to undersea cables is not a new phenomenon, but deliberate sabotage is a more concerning and less common occurrence. Global intelligence agencies have long warned about the vulnerability of undersea communications infrastructure to state-sponsored attacks. Cables are essential for military communications, intelligence gathering, and global commerce, making them potential targets in geopolitical conflicts or acts of cyber warfare.

In recent years, there have been increased reports and concerns about the presence of Russian and Chinese naval vessels operating in close proximity to critical undersea cable landing points and routes globally. While direct attribution is often difficult and rarely made public, these reports fuel concerns about the potential for espionage or physical disruption. The current incident, with a vessel present during the fault, fits a pattern that intelligence agencies have been monitoring.

The response from Subco, particularly the call for a police investigation and the CEO's public statements, indicates a belief that this is beyond a simple accident. If confirmed as an act of sabotage, it would mark a significant escalation in the threats facing digital infrastructure and necessitate a robust response from both telecommunications companies and national security agencies to protect these vital assets.

The investigation will likely focus on identifying the specific vessel, its activities, and any potential motive. This may involve reviewing maritime traffic data, satellite imagery, and potentially engaging with international partners if the vessel was not Australian-flagged. The outcome of this investigation will be crucial in understanding the risks to other critical undersea infrastructure and informing future security measures.