DUBAI: Iran warned last week that submarine cables in the Strait of Hormuz were a vulnerable point for the region’s digital economy, raising concerns about potential attacks on critical infrastructure.

The narrow waterway, already a chokepoint for global oil shipments, is equally vital for the digital world. Several fibre-optic cables snake across the seabed of the strait, connecting Asia to Europe via the Gulf states and Egypt.

What makes undersea cables important?

Subsea cables are fibre-optic or electrical cables laid on the sea floor to transmit data and power. They carry around 99 per cent of the world’s internet traffic, according to the ITU, the United Nations agency for digital technologies.

They also carry telecommunications and electricity between countries, and are essential for cloud services and online communications. “Damaged cables mean the internet slowing down or outages, e-commerce disruptions, delayed financial transactions and economic fallout from all of these disruptions,” said analyst Masha Kotkin.

Major cables through the Strait of Hormuz include the Asia-Africa-Europe 1 (AAE-1), connecting Southeast Asia to Europe via Egypt, with landing points in the UAE, Oman, Qatar, and Saudi Arabia; the FALCON network, connecting India and Sri Lanka to Gulf countries, Sudan, and Egypt; and the Gulf Bridge International Cable System, linking all Gulf countries including Iran. Additional networks are under construction, including a system led by Qatar’s Ooredoo.

The risks

While the total length of submarine cables has grown considerably between 2014 and 2025, faults have remained stable at around 150,200 incidents per year. State-sponsored sabotage remains a risk, but 70-80 per cent of faults are caused by accidental human activities, primarily fishing and ship anchors.

Other risks include undersea currents, earthquakes, subsea volcanoes, and typhoons, said Alan Mauldin, research director at telecom research firm TeleGeography. The industry addresses these by burying cables, armouring them, and selecting safe routes, he said.

The Iran war has brought unprecedented disruption to regional infrastructure, including hits to Amazon Web Services data centres in Bahrain and the UAE. Subsea cables have been spared so far.

However, an indirect risk exists from damaged vessels inadvertently hitting cables by dragging anchors. “In a situation of active military operations, the risk of unintentional damage increases, and the longer this conflict lasts, the higher the likelihood of unintentional damage,” Kotkin said.

A similar incident occurred in 2024, when a commercial vessel attacked allegedly by Houthis drifted in the Red Sea and severed cables with its anchor.

No easy fix

Repairing damaged cables in conflict zones poses a separate challenge to securing them. While the physical repair itself is not overly complicated, decisions by repair vessel owners and insurers may also be impacted by the risk of damage from fighting or the presence of mines, experts say.

Permits to access territorial waters add another layer of difficulty. “Often one of the biggest problems with doing repairs is you have to get permits into the waters where the damage is. That can take a long time sometimes and can be the biggest source (of problems),” according to Mauldin, the director at TeleGeography.

Once the conflict ends, industry players will also face the challenge of re-surveying the sea floor to determine safe cable positions and avoid ships or objects that may have sunk during hostilities, he added.

What alternatives are there?

While potential damage to subsea cables would not cause a complete connectivity loss due to land-based links, experts agree that satellite systems are not a feasible replacement as they cannot handle the same volume of traffic and are more expensive.

“It’s not as though you could just switch to satellite. That’s not an alternative,” Mauldin said, noting that satellites rely on connections to land-based networks and are better suited for things in motion, like aeroplanes and ships.

Published in Dawn, April 29th, 2026