As Iran effectively closes the Strait of Hormuz to Western shipping, a select group of nations have reportedly secured passage for their vessels through back-channel negotiations and geopolitical alignment.
Since March 2, 2026, Iran has enforced a de facto blockade of the Strait of Hormuz—the chokepoint through which one-fifth of global oil and liquefied natural gas transits—following retaliatory measures against joint U.S. and Israeli airstrikes that began February 28. While maritime traffic has plummeted by 90-97%, maritime intelligence confirms that Tehran is selectively granting passage to ships from friendly nations, creating a two-tiered shipping regime that favors non-combatant countries aligned with or neutral to Iran’s position.
The Permitted Nations
Maritime tracking data reveals that vessels from specific countries are being allowed to transit the strait through a carefully controlled “permission-based” system:China remains the primary beneficiary of Iran’s selective access policy. Multiple vessels including the Stellan and Nora—carrying over two million barrels of crude oil—have successfully navigated the strait, with Chinese-flagged and Chinese-owned vessels receiving priority clearance . Maritime analysts note that vessels bound for China are “more likely to be granted passage” as Iran seeks to maintain economic ties with its key trading partner while exerting pressure on Western economies .India has secured transit rights for its vessels after diplomatic negotiations. At least two Indian-flagged tankers carrying liquefied petroleum gas reached Indian ports over the weekend of March 15-16, following talks between officials. The Indian vessel Nanda Devi was among those documented arriving at Vadinar Port after receiving Iranian authorization .Pakistan has successfully transited the strait, with the Pakistani-flagged oil tanker Karachi—carrying approximately 700,000 barrels of crude oil—crossing through the Larak-Qeshm Channel near the Iranian coast .Turkey has also secured passage for its vessels. Turkish Transport Minister Abdulkadir Uraloglu confirmed that a Turkish-owned ship crossed the strait with explicit Iranian permission, highlighting Ankara’s diplomatic leverage in the crisis .Greece presents a complex case. While Greek shipping companies operate approximately ten vessels that have recently transited, analysts suggest these may be cases where Iranian authorities verified the cargo and ownership to ensure no links to U.S. or Israeli interests. These vessels appear to transit under strict scrutiny rather than blanket national authorization .
The Alternative Route
Ships from permitted nations are not transiting through the main shipping lane. Instead, they are navigating an alternative corridor through Iranian territorial waters, specifically via the Larak-Qeshm Channel opposite the Iranian port of Bandar Abbas . This route forces vessels to “hug the Iranian coastline” before emerging into international waters at the eastern end of the strait—a maneuver that allows Iranian forces to maintain physical control and inspection capabilities over all transiting vessels .Maritime analyst Michelle Wiese Bockmann noted this workaround represents “one of the first signs of permission-based transits to friendly countries,” with vessels broadcasting signals such as “CHINA OWNER_ALL CREW” to identify themselves as eligible for passage .
The Blockade Strategy
Iran’s Revolutionary Guard has reportedly established checkpoints where transit vessels undergo inspection to verify they have “no cargo or ownership linked to the United States” . Iranian sources maintain the strait is not officially closed, but that passage is denied to any vessel that could “benefit the aggressors”—referring specifically to the U.S. and Israel .The strategy appears calculated to maximize economic leverage while minimizing military confrontation. By allowing Asian and non-aligned nations to continue receiving energy supplies, Iran maintains crucial economic relationships while driving up insurance premiums and oil prices for Western economies. Brent crude has surged from $72.48 pre-war to highs of $119.50, currently trading above $103 per barrel .
The Excluded
The blockade specifically targets vessels with links to the United States, Israel, and their immediate allies. Approximately 1,000 ships remain stranded on either side of the strait awaiting clearance, while Western naval forces face the threat of mine warfare and missile attacks if they attempt to escort vessels through the main channel . Iran has deployed sea mines in the primary shipping lanes—denied by Tehran but confirmed by Washington—and has demonstrated the capability to strike vessels with missiles and drones .
Geopolitical Implications
The selective passage system represents a “smart control” strategy that differentiates between states, allowing Iran to exert pressure on its adversaries while rewarding nations that maintain neutral or supportive stances . As Tomas Alexa, senior analyst at maritime intelligence firm Ambrey, explained: “By selectively restricting access rather than completely closing the strait, Iran is signaling that it maintains operational control over the waterway and can differentiate between states” .For the countries reportedly able to pass, the arrangement provides critical energy security and commercial advantage while the global economy absorbs the shock of reduced Gulf oil exports. For Washington and its allies, the situation presents a dilemma: military efforts to reopen the strait could escalate the conflict, while accepting the selective blockade cements a new reality where Iranian authority over the waterway is tacitly acknowledged

