What Happened
- Shipping traffic through the Strait of Hormuz has been squeezed to a trickle since the US-Israel military campaign against Iran began on February 28, 2026, with only 21 tankers transiting the route compared to more than 100 ships daily before the conflict.
- Tracking data shows that certain vessels — predominantly China-linked ships — are navigating through Iranian territorial waters close to the coast, passing between the Iranian islands of Larak and Qeshm to exit into the Gulf of Oman.
- At least five ships used this Iranian-waters route on March 15–16 alone, with dozens of vessels broadcasting their Chinese ownership or crew presence to seek implied safe passage from Iran.
- Analysts describe this as an emerging "permission-based" transit system, where Iran has effectively created a selective corridor for nations it chooses not to confront — primarily China.
- Mainstream Chinese tanker owners and Western-linked vessels continue to avoid the route, while bulk carriers and general cargo ships with China-linked identities have been the primary transitors.
Static Topic Bridges
Strait of Hormuz as a Maritime Chokepoint
The Strait of Hormuz is a narrow waterway connecting the Persian Gulf to the Gulf of Oman and the Arabian Sea, lying between Iran to the north and the UAE and Oman to the south. At its narrowest, it is approximately 39 kilometres wide, with the navigable shipping lane only about 3 kilometres wide in each direction. It is the world's most critical maritime chokepoint for energy trade.
- Approximately 20–25% of the world's seaborne oil trade transits the Strait of Hormuz, amounting to roughly 20 million barrels per day in 2024.
- The top five exporters — Saudi Arabia, Iraq, the UAE, Iran, and Kuwait — collectively account for over 93% of crude and condensate volumes transiting the strait.
- Around 84% of crude oil and 83% of liquefied natural gas passing through the strait is destined for Asian markets; China, India, Japan, and South Korea together account for 69% of Hormuz crude flows.
- India's energy security is directly tied to the strait, as a significant portion of its crude oil imports originate from Gulf producers.
Connection to this news: Iran's ability to selectively grant or deny transit access demonstrates that control over the strait is not merely a military concern but a tool of geopolitical coercion, with asymmetric consequences for import-dependent economies like India.
Freedom of Navigation and UNCLOS
The United Nations Convention on the Law of the Sea (UNCLOS), adopted in 1982 and in force since 1994, establishes the legal regime governing maritime transit. Under UNCLOS Article 38, ships and aircraft enjoy the right of "transit passage" through international straits used for international navigation — a right that cannot be suspended by the coastal state. However, Iran is a party to UNCLOS and has historically asserted expansive interpretations of its territorial sea rights in the Gulf.
- UNCLOS distinguishes between innocent passage (through territorial seas, subject to coastal-state conditions) and transit passage (through international straits, which is non-suspendable).
- The Strait of Hormuz qualifies as an international strait under Part III of UNCLOS.
- Iran has periodically threatened to "close" the strait in response to sanctions or military threats, but has rarely acted on such threats at scale — the 2026 crisis marks an unprecedented practical restriction.
- The 1988 Tanker War (Operation Praying Mantis) between the US and Iran was the last major maritime confrontation in the strait.
Connection to this news: Iran's "permission corridor" effectively creates a de facto departure from the UNCLOS transit passage regime without a formal closure, making the legal and strategic situation ambiguous and difficult to challenge through international institutions.
India's Strategic Dependence and the Indian Ocean Region
The Indian Ocean Region (IOR) is central to India's economic and strategic interests, with the Strait of Hormuz serving as the western gateway to India's energy lifeline. India imports over 85% of its crude oil needs, a large proportion from Gulf Cooperation Council (GCC) states. Disruption to Hormuz transit directly raises India's import costs, affects foreign exchange reserves, and can fuel domestic inflation.
- India's imports from the Gulf region account for roughly 40–45% of its total crude oil imports in a typical year.
- The Indian Navy's Western Command maintains operational presence in the Arabian Sea; India participates in Combined Maritime Forces (CMF) and bilateral naval exercises in the region.
- India's "Act West" dimension of its neighbourhood and extended-neighbourhood policy prioritises maritime security in the IOR.
- The Gulf also hosts approximately 8–9 million Indian diaspora workers, making remittance flows (India's largest source of foreign remittances) contingent on Gulf stability.
Connection to this news: An Iranian permission-based transit system that favours China while restricting Western-linked vessels creates a structural disadvantage for Indian shipping and energy procurement, underscoring the need for India's strategic autonomy and diversified energy sourcing.
Key Facts & Data
- Before the 2026 conflict: more than 100 ships transited the Strait of Hormuz daily.
- Since the conflict began (Feb 28): only 21 tankers transited through mid-March 2026.
- China-linked vessels using the Iranian coastal route: at least 11 between March 1–15, mostly general cargo ships.
- Strait width: approximately 39 km total; navigable channel approximately 3 km in each direction.
- Global dependency: ~20 million barrels per day of oil flowed through Hormuz in 2024.
- Asian markets receive ~84% of Hormuz crude oil flows.
- India, China, Japan, South Korea together account for 69% of all Hormuz crude flows.