At least 50 laden tankers carrying Iranian crude, petroleum products and liquefied petroleum gas remain backed up along Iran's coast under a US naval blockade, broadly unchanged from two months ago, according to a shipping update from United Against Nuclear Iran published Oct. 5.

The nonprofit, which calls itself a non-partisan policy organization, said Washington's near-total blockade has trapped the vessels near the country's key export infrastructure. "Loitering at anchorages across the Indo-Pacific rather than transiting back to Iranian ports because of the US blockade" is how UANI described the empty tonnage.

Where are the stranded tankers?

Within the Persian Gulf, at least 11 laden tankers sit anchored east of Kharg Island, the Islamic Republic's main crude export terminal. Another five laden vessels hold further south. No tankers were loading at Kharg on Monday, the group reported.

The disruption spreads well beyond the Strait of Hormuz. Twenty-one additional Iran-flagged vessels—mostly empty—drift across the Indo-Pacific. Twenty of them ride at anchor off Sri Lanka, with one holding off Oman. That geographic spread stretches the operational impact from the Gulf of Oman to the Bay of Bengal.

What is happening to Iranian export volumes?

Iran loaded no crude oil onto tankers in September, preliminary vessel-tracking estimates compiled by Bloomberg show. Loadings fell to zero last month—the first such month since the war began in February.

The blockade's reach extends well beyond Iran-flagged tonnage. A total of 130 vessels have been redirected since the operation began, according to the US military tally, underscoring the breadth of Washington's enforcement effort.

What is Washington's escalation plan?

Treasury Secretary Scott Bessent told Axios this week that Iran would have no oil on the water "for the first time in history." The comment—made in the same week the September loading data confirmed zero exports—frames the blockade as a deliberate pressure campaign aimed at forcing Tehran's capitulation.

What are the commercial consequences?

For charterers, refiners and trading desks that historically tapped Iranian barrels at a discount, the signal is stark. Iranian crude cannot reach Asian refiners through conventional routes while Kharg sits idle.

Tanker owners with laden vessels anchored east of Kharg now face mounting delays, indefinite idle days and reduced earning capacity. Non-sanctioned operators with Gulf exposure are watching the situation closely as the standoff drags on.

The 21 idle, Iran-flagged hulls scattered from Oman to Sri Lanka point to a stranded fleet with no productive position in the global market. Shipowners, charterers and forwarders tied to Iranian-linked flows have no obvious workarounds while Kharg and the Strait remain under blockade.

What trajectory does the data suggest?

UANI said the count of laden tankers near Iran has not moved meaningfully in two months. That steadiness cuts two ways: it indicates the blockade has reached a holding pattern rather than tightening further, and it leaves Tehran without any near-term relief from the chokehold.

With Kharg idle, September loadings at zero and the Strait of Hormuz effectively closed to sanctioned tonnage, Iranian crude exports will stay cut off in the immediate term unless Washington's policy posture shifts.