What Happened
- Iran retained effective control over the Strait of Hormuz as of early April 2026, following the outbreak of conflict between the US-Israel coalition and Iran in late February 2026
- Indian vessels sought government clearance before transiting the strait; more than 25 India-bound ships remained stuck west of the chokepoint
- Shipping traffic through the strait collapsed to a trickle — approximately 21 tankers transited since the conflict began on February 28, compared to over 100 ships per day before the crisis
- India has successfully diversified approximately 70% of its crude oil imports to non-Hormuz routes, up from 55% before the crisis, sourcing from around 40 countries
- At least three Indian seafarers lost their lives; approximately 20,000 Indian seafarers remained stranded aboard vessels near the strait
- Iran signalled selective permission for passage — Iraqi-flagged ships were cleared; India engaged diplomatically to secure passage for its LPG tankers
Static Topic Bridges
Strait of Hormuz — Geography and Strategic Importance
The Strait of Hormuz is a narrow waterway separating Iran (to the north) from Oman and the UAE (to the south), connecting the Persian Gulf to the Gulf of Oman and thence to the Arabian Sea. At its narrowest, the strait is approximately 33 km (21 miles) wide, though the navigable shipping lane is only about 3 km in each direction with a 3-km buffer zone. It is the world's most critical oil transit chokepoint: in 2024, approximately 20 million barrels per day (mb/d) of oil and petroleum products transited the strait, representing roughly 20% of global petroleum liquids consumption and more than one-quarter of global seaborne oil trade.
- Location: between Iran and the Oman/UAE coast; connects Persian Gulf to Gulf of Oman
- Width at narrowest: ~33 km; navigable channel: ~6 km (two 3-km lanes + buffer)
- Volume (2024): ~20 mb/d crude oil and petroleum products; ~20% of global petroleum consumption
- LNG: ~20% of global LNG trade transits (primarily Qatari LNG)
- Major exporters through strait: Saudi Arabia, UAE, Kuwait, Iraq, Iran, Qatar
- India's import dependency: second-largest destination for Hormuz crude flows at ~14.7%
Connection to this news: Iran's effective control over the strait — backed by Islamic Revolutionary Guard Corps (IRGC) naval forces — has given it leverage to selectively permit or deny transit, directly impacting India's energy supply chain and the safety of Indian seafarers.
India's Energy Security and Import Dependence
India is the world's third-largest oil consumer and imports approximately 85-87% of its crude oil requirements. The Persian Gulf region accounts for the bulk of these imports. Traditionally, about 55% of India's crude imports transited the Strait of Hormuz; this has been reduced to approximately 30% (i.e., 70% now comes from outside Hormuz) through accelerated diversification during the current crisis. Key alternative suppliers include Russia, the United States, West Africa (Nigeria, Angola), and non-Gulf suppliers.
- India's crude import dependency: ~85-87% of total consumption is imported
- Pre-crisis: ~55% of India's crude transited the Strait of Hormuz
- Post-crisis diversification: ~70% of India's crude now sourced outside the strait
- Total import sources: ~40 countries as of March 2026
- Strategic Petroleum Reserve (SPR): India maintains reserves at Visakhapatnam, Mangaluru, and Padur (combined ~5.33 million tonnes, equivalent to ~9.5 days of consumption)
- India is a founding member of the International Energy Agency's (IEA) Association; not a full IEA member but cooperates on energy security
Connection to this news: India's rapid import diversification during the 2026 Hormuz crisis demonstrates both the vulnerability of its energy supply chain and the effectiveness of a proactive sourcing strategy. The Indian government's engagement to secure diplomatic clearance for its LPG tankers reflects the bilateral leverage India has maintained with Iran.
UNCLOS and Freedom of Navigation
The United Nations Convention on the Law of the Sea (UNCLOS, 1982) governs transit passage through international straits. Article 37 and Article 38 of UNCLOS establish the right of "transit passage" through straits used for international navigation — ships and aircraft of all states enjoy the right of continuous and expeditious transit. Iran is a signatory to UNCLOS (ratified 1982); the IRGC's interference with shipping in the strait potentially violates transit passage rights under international law. However, Iran has historically contested certain UNCLOS interpretations and has claimed rights to regulate passage during armed conflict.
- UNCLOS adopted: 1982 (Jamaica); entered into force: 1994; 168 parties
- Article 37: Applies to straits used for international navigation between one area of the high seas or EEZ and another
- Article 38: Transit passage right — continuous and expeditious; not subject to suspension by the coastal state (unlike innocent passage in territorial seas)
- India ratified UNCLOS: 1995
- Iran's position: contests some UNCLOS provisions; claims right to restrict military passage
- IRGC has seized and harassed commercial vessels in the Persian Gulf multiple times (e.g., MV Advantage Sweet, April 2023)
Connection to this news: Iran's control of the strait and selective permission for transit raises fundamental questions of freedom of navigation rights under UNCLOS — a key international relations and geography UPSC topic. India's insistence on government clearance before its vessels transit reflects caution given the IRGC's demonstrated willingness to seize vessels.
India-Iran Bilateral Relations and Chabahar Port
India and Iran share significant strategic and economic ties despite US sanctions pressure on Tehran. India's most significant strategic investment in Iran is the Shahid Beheshti terminal at Chabahar Port, Sistan-Balochistan Province — India's only overseas port investment. Chabahar gives India direct access to Afghanistan and Central Asia bypassing Pakistan, and is a key node in the International North-South Transport Corridor (INSTC). During the 2026 Hormuz crisis, India's existing diplomatic channel with Iran proved critical in securing clearance for India-flagged LPG tankers.
- Chabahar Port (Shahid Beheshti terminal): India Ports Global Ltd (IPGL) operates; 10-year contract signed May 2024
- Chabahar is exempt from US sanctions (Special Purpose Vehicle exemption)
- INSTC (International North-South Transport Corridor): 7,200 km multimodal route — India → Iran → Russia; reduces transit time to Europe by ~30%
- India-Iran bilateral trade: heavily constrained by US sanctions post-2018
- India was previously Iran's second-largest oil importer; resumed limited oil imports in 2026
Connection to this news: The crisis has highlighted how India's diplomatic engagement with Iran — including the Chabahar relationship — provided leverage to negotiate safe passage for Indian-flagged vessels, while simultaneously forcing India to rapidly diversify oil imports.
Key Facts & Data
- Strait of Hormuz: ~20 million barrels/day oil transit (2024); ~20% of global petroleum consumption
- India's crude import dependency: ~85-87% imported
- Pre-crisis Hormuz dependency: ~55% of India's crude imports
- Post-diversification: ~70% of India's crude now from non-Hormuz sources
- India's crude import sources: ~40 countries (March 2026)
- Ships stranded west of Hormuz: ~2,500 vessels; ~20,000 Indian seafarers affected
- India-bound ships stuck: more than 25 vessels at time of reporting
- Tankers transiting since Feb 28 conflict: ~21 (vs 100+ per day pre-crisis)
- Indian seafarers killed: at least 3
- India's Strategic Petroleum Reserve: ~5.33 million tonnes (Visakhapatnam, Mangaluru, Padur)
- Chabahar port contract: 10-year agreement (May 2024), operated by India Ports Global Ltd
- UNCLOS transit passage: Article 38 — right cannot be suspended by coastal state