Strait of Hormuz

President Donald Trump announced that the United States will impose a naval blockade on the Strait of Hormuz after weekend talks to end the Iran war collapsed without a settlement. The Islamabad negotiations, which were intended to turn a tenuous ceasefire into a durable peace and reopen Hormuz to safe navigation, broke down over unresolved disputes on nuclear enrichment, sanctions relief, and control of maritime transit. In response, Trump issued an executive order directing the US Navy to interdict any vessel attempting to transit the strait, with particular focus on neutral and commercial ships that have paid Iranian transit tolls, which the White House now characterises as an illegal extortion regime rather than a lawful fee regime.   Trump’s declaration instantly elevates the conflict from a regional shooting war to a global maritime and energy crisis centred on the world’s most critical oil chokepoint, a waterway just twenty‑one nautical miles across at its narrowest. By pledging to enforce a blockade without United Nations Security Council authorisation, the president has pushed the United States into a legally and operationally contested grey zone, framing the move as necessary to dismantle the Islamic Revolutionary Guard Corps’ grip over the strait and sever a key stream of cryptocurrency and foreign-exchange revenue to Tehran. The administration’s strategy now hinges on whether US naval power, layered secondary sanctions, and sustained diplomatic pressure can actually sustain a prolonged blockade in the face of Iranian asymmetric deterrence. The following analysis, therefore, centers on Trump’s blockade order itself: its operational viability, Iran’s capacity to erode or break it through asymmetric tactics, and the resulting shockwaves for global energy markets, commercial shipping patterns, and regional economic stability.

The landscape of modern air warfare has undergone a profound and structural transformation over the past decade. Air superiority is no longer the exclusive domain of those possessing the most expensive and technologically advanced platforms; rather, it has become accessible to actors capable of effectively leveraging scale and repetition against sophistication and complexity. This new equation has been clearly manifested in the widespread deployment of one-way attack drones, particularly the Iranian “Shahed” series, which has significantly altered established strategic calculations. In their early iterations, these drones operated on relatively simple logic: they were pre-programmed with target coordinates and then launched to navigate their trajectories using conventional satellite navigation systems such as the American GPS and its Russian counterpart, GLONASS. However, this reliance on such systems simultaneously made them the most exploitable vulnerability, as defenders rapidly developed electronic warfare capabilities, including jamming and spoofing tools, to disrupt their guidance and neutralise their missions.   However, this reality did not endure for long. As the intensity of conflicts involving these systems escalated, Iranian drones transitioned into a fundamentally different phase with the integration of communication modules operating via the commercial satellite network Iridium. This was not merely a technical upgrade but a calculated and direct response to GPS vulnerabilities, reflecting a strategic exploitation of civilian infrastructure for military purposes. While GPS satellites struggle to withstand ground-based jamming due to the weakness of their signals transmitted from altitudes exceeding 20,000 kilometres, Iridium satellites operate in low Earth orbit at altitudes of no more than 800 kilometres, emitting signals up to a thousand times stronger. These signals are further protected by layers of encryption that make spoofing or manipulation extremely difficult.   Shahed drones have thus evolved from inert projectiles following a fixed, unalterable path into connected platforms linked to their operators in real time, capable of receiving updates, changing course, sharing data with other airborne units, and even conducting precise strikes against moving targets such as ships at sea. This report therefore offers an in-depth technical and strategic examination of this transformation and its battlefield implications, beginning with the structure and operating logic of the Iridium network, moving through an analysis of the Shahed-131 platform and the integration of these communications into it, and culminating in an assessment of the operational impact this has had on some of the world’s most complex and densely layered air defence systems, namely Israel’s multi-layered architecture, which faced its most severe tests between 2024 and 2026.

The contemporary global economy is anchored in a tightly integrated digital and physical infrastructure, in which the continuity of international markets depends on an extensive network of submarine fibre-optic cables spanning approximately 1.3 million kilometres. This strategic architecture carries between 95 and 99% of intercontinental digital communications and constitutes the foundational layer for the settlement of daily financial transactions valued at roughly 10 trillion dollars. For decades, geopolitical analysis has prioritised the security of surface maritime corridors to safeguard the uninterrupted flow of conventional energy resources. Yet evolving realities indicate a decisive shift. The durability of the global economic system now hinges just as critically on protecting these submerged networks, which have emerged as indispensable arteries of global connectivity and financial stability.   This reality is especially visible in the Middle East, particularly across the Arabian Gulf, the Strait of Hormuz, the Arabian Sea, and the Red Sea, where the geographic corridors that govern trade flows and energy supply chains overlap with the main routes of global data transmission. The Strait of Hormuz, which is only 21 nautical miles wide, sits at the centre of this convergence. Around 21 million barrels of crude oil and one-third of global liquefied natural gas supplies pass through it each day. At the same time, 17 submarine cable systems run across its seabed, carrying nearly 30% of total international internet traffic. This intense concentration of physical and digital infrastructure within a narrow geographic space creates a severe security vulnerability. It exposes the global economy to systemic risks tied directly to regional instability.   These structural risks moved from theoretical assessment to operational reality with the outbreak of direct military confrontation in early 2026 between the United States and Israel on one side and Iran on the other, in what became known as Operation Epic Fury. These developments marked a fundamental shift in Iranian military doctrine. Faced with growing limits on its ability to disrupt surface energy flows through conventional means, Iran increasingly turned toward asymmetric threats. This shift is reflected in a move away from the traditional threat of closing maritime chokepoints to the deliberate targeting of submarine internet cable networks, using their disruption as a tool of deterrence and geopolitical pressure. It represents a calculated effort to exploit the physical vulnerabilities of civilian infrastructure to offset conventional power imbalances. In doing so, it introduces risks that extend well beyond the regional theatre and directly affect the foundations of the digital economy, in an era increasingly shaped by hybrid warfare and the militarisation of the maritime domain.   This emerging pattern of threat also creates what can be classified academically as a dual and simultaneous crisis. In such a scenario, the systematic disruption of submarine cables would paralyse global energy supply chains while simultaneously causing severe degradation across the digital infrastructure of the Middle East, South Asia, and Europe.   The immediate consequences would extend far beyond the loss of communications services for individuals. They would include major disruptions to electronic clearing systems that underpin sovereign wealth fund investments, as well as the paralysis of digital command-and-control centres operated by state-owned energy conglomerates. Such targeting would also disrupt military command-and-control networks and sever the communication channels needed to manage maritime navigation and to reroute vessels during crises. It would further undermine the artificial intelligence and cloud computing infrastructure on which many states in the region rely for their economic diversification strategies.   The plausibility of these threats is reinforced by recent material precedents that have exposed the infrastructure's real vulnerabilities. Most notable was the damage inflicted on Red Sea cable systems following the sinking of the Rubymar in 2024, followed by multiple line disruptions in the same region in September 2025. Together, these incidents underscore the fragility of these networks in the face of both accidental disruptions and deliberate acts of sabotage.   Building on these complex strategic and economic dynamics, this paper examines the implications of a large-scale attack targeting submarine communications infrastructure in the Arabian Gulf. It does so through a detailed assessment of the technical and military capabilities available to Iran to carry out physical sabotage operations beneath the seabed, alongside an analysis of the strategic motives driving this form of asymmetric escalation. By integrating recent historical precedents with updated data on regional and international levels of digital dependence, the paper seeks to assess the scale of the losses likely to result should such a scenario materialise.

Iran has blocked maritime navigation through the Strait of Hormuz since the first week of March, following the attacks it sustained during Operation Epic Fury. This disruption has hindered the movement of nearly 20 million barrels of crude oil per day. It has trapped shipments of liquefied natural gas, accounting for around 20% of global consumption, within the waters of the Arabian Gulf. As a result, international energy markets are experiencing sharp price volatility affecting Brent crude futures and European gas contracts.   At the same time, maritime shipping lines have been compelled to reroute their commercial fleets, forcing them to navigate around the historic Cape of Good Hope route at the southern tip of Africa. This enforced geographic diversion adds approximately 19 days to maritime transit times to and from Asia, generating weekly losses for global supply chains estimated at between $2 billion and $3 billion in additional operating and fuel costs.   This operational disruption directly affects the technological infrastructure of East Asia, where advanced semiconductor fabrication facilities in Taiwan and South Korea require vast, continuous electricity supplies to operate lithography systems around the clock. These critical facilities, which account for approximately 68% of global semiconductor production, rely on imported liquefied natural gas to ensure the stability of their power networks and prevent disruptions.   In parallel, the precision manufacturing processes involved depend on highly specialised raw materials whose primary sources are concentrated in regions currently affected by the crisis. In particular, production lines require ultra-high-purity helium gas, extracted as a by-product from Gulf LNG liquefaction facilities, which represent roughly 35% of global supply, as well as bromine, which Korean factories import at a rate of 97.5% from the Dead Sea coast for chemical etching processes. Accordingly, technology firms are accelerating efforts to assess their exposure to the dual energy and critical chemical input shortages. At the same time, economic stakeholders monitor the crisis's trajectory with heightened caution to safeguard supply chain continuity.   Accordingly, this analysis examines the strategic and operational implications arising from the closure, focusing on three principal dimensions. First, it addresses the disruption of liquefied natural gas supplies and their direct impact on the security of power grids that sustain major Asian semiconductor manufacturing hubs. Second, it examines the sharp interruption in the supply of critical raw materials, particularly specialised gases and petrochemical inputs required for precision manufacturing processes. Finally, it explores the logistical repercussions of the forced rerouting of maritime shipping routes, as well as the strategic measures states are considering to mitigate future geopolitical risks.

The global political and economic landscape is undergoing structural shifts following the outbreak of US and Israeli military operations against Iran in late February 2026. In response to this escalation, the Iranian leadership adopted a strategic decision to close the Strait of Hormuz to commercial shipping and oil tankers, leveraging its asymmetric capabilities, including naval mines, advanced missile systems, and drones, to transform the strait into an active military theatre.   The Strait of Hormuz constitutes a critical artery for global energy supplies, with approximately 20 million barrels of oil transiting through it daily, accounting for around 20% of global consumption, as well as shipments of liquefied natural gas (LNG). The closure has produced immediate economic repercussions, including the suspension of maritime traffic, the withdrawal of insurance coverage by shipping insurers, and a sharp surge in oil prices, which have exceeded $120 per barrel. In an effort to contain the crisis, the European Union’s High Representative for Foreign Affairs and Security Policy, Kaja Kallas, proposed a diplomatic initiative to establish a secure maritime corridor in the Strait of Hormuz under United Nations supervision to ensure the safe flow of energy supplies.   Kallas’s initiative draws on the “Black Sea Initiative” model, which enabled the export of Ukrainian grain under international guarantees. European efforts are driven by concerns that disruptions to gas supplies could undermine global food production, given their direct linkage to fertiliser manufacturing. The initiative, therefore, seeks to insulate energy vessels from military targeting to preserve global economic stability. Against this backdrop, the central question arises: to what extent can this initiative help de-escalate the current crisis, and what alternatives remain should the Black Sea model prove unviable?

The United States and Israel launched Operation Epic Fury in late February 2026, targeting Iran’s nuclear and missile infrastructure and seeking to remove its political leadership. Although the operation achieved its initial tactical objectives with high precision, it provoked an asymmetric retaliatory response from the remaining Iranian forces. This response took the form of a comprehensive blockade of the Strait of Hormuz, the world’s most critical maritime artery for energy transport, triggering a severe global economic shock. Such disruption could propel the international system towards reducing its reliance on fossil fuels and accelerating the adoption of alternative domestic energy solutions, most notably nuclear power.   At the same time, global electricity demand is rising sharply, driven by the rapid expansion of advanced artificial intelligence infrastructure and high-performance computing facilities. This sudden disruption of fuel supplies places policymakers in major industrial economies under immediate economic and security pressures, while simultaneously exposing the profound consequences of closing the Strait. In this context, the present analysis examines the repercussions of the Strait of Hormuz's closure on global supply chains. It then develops a historical comparison with the oil price shocks of the 1970s, illustrating how those crises redirected states towards nuclear technology. The study concludes by analysing emerging regulatory and financial measures, as well as new geopolitical alignments, that are accelerating the global drive to construct nuclear reactors in 2026.

The strategically significant Rajaee Port in Bandar Abbas, southern Iran, was rocked by a massive explosion during the third round of Iranian-US talks in Oman on Saturday, April 26 2025, marking a pivotal moment that warrants in-depth analysis. Located near the Strait of Hormuz, the port serves as a critical nexus for Iran's container traffic and plays a crucial role in the country’s foreign trade, especially amid the sanctions imposed on it. Initial reports point to two primary hypotheses regarding the cause of the incident: the first suggests an accidental explosion resulting from mishandling hundreds of tons of a vital chemical substance, likely used to fuel Iran’s ballistic missile programme, reminiscent of the 2020 Beirut explosion; the second, however, raises the possibility of deliberate sabotage, potentially orchestrated by Israel with the intent to disrupt the Iranian-American diplomatic track. The timing of the explosion, coinciding with intense diplomatic efforts, adds further weight to its potential ramifications.   Regardless of the final cause, an explosion of such magnitude exposes significant vulnerabilities in Iran's security and management systems, reverberating across the entire region. It casts a shadow over diplomatic efforts aimed at addressing nuclear tensions and other unresolved issues. This commentary explores the potential post-incident scenarios, the implications of each hypothesis