Iranian Tankers Break US Blockade to Reach Indian Ocean

Wed Jun 17 2026 18:11:03 GMT+0000 (Coordinated Universal Time)

Three Iran‑flagged tankers have sailed past the U.S. blockade line in the Gulf of Oman, signaling a shift in Iran’s oil export strategy amid stalled sanctions talks.

Three crude‑oil tankers owned by the National Iranian Tanker Company have crossed the U.S. blockade line in the Gulf of Oman, with two broadcasting positions as they left Chabahar port and a third turning on its locator after the line. This move comes after President Trump’s announcement of an immediate removal of the blockade, though the U.S. Navy has confirmed the blockade will remain active until a new deal is signed in Switzerland. The tankers, carrying 3.8 million barrels of oil, could be Iran’s first crude exports in two months, raising concerns about how U.S. sanctions will be enforced outside the Gulf. Maritime‑traffic data shows a heightened activity of Iranian‑linked vessels worldwide, hinting at a resumed economic push following the potential deal.

Iranian Tankers Break US Blockade to Reach Indian Ocean

Three oil tankers under the flag of Iran have successfully crossed the U.S. imposed blockade line in the Gulf of Oman, according to ship‑tracking data released by MarineTraffic. Two vessels—named Hero II and Sonia I—were already broadcasting their positions as they departed Chabahar port on Tuesday, sailing southeast into the Arabian Sea. The third, Diona, began broadcasting only after it crossed the blockade line just yesterday.

The blockade was intensified by the U.S. government in response to Iran’s nuclear programme, alleged support for terrorist groups and human‑rights violations. President Donald Trump, on Sunday, announced the “immediate removal” of the blockade. However, the U.S. Navy reiterated that the restriction remains in force until a new sanctions‑seeking agreement, anticipated to be signed in Switzerland on Friday, is finalized.

Windward Maritime Intelligence’s senior analyst Michelle Wiese Bockman noted that this movement signals Iran’s confidence that the blockade is over, even as the U.S. insists it will stay in place until a deal is struck. If they reach their destinations, the ships would mark Iran’s first oil export in roughly two months, according to TankerTrackers.com.

The three tanker campaigns combined carry a total of about 3.8 million barrels of crude oil, but there have been no reports of their intended ports of destination. The U.S. Department of Defense has previously enforced the blockade far outside the Gulf, intercepting Iranian‑linked vessels in the Indian Ocean, far from the Gulf’s boundaries.

Further shipping intelligence shows increased activity of Iranian‑related tankers beyond the Gulf, including two vessels operating in the Strait of Malacca that have begun broadcasting again after a prolonged period of silence. Two other NITC tankers, Dan and Sinopa, were last seen moving toward Iran in early April and have now restarted telemetry.

The rapid re‑entry of these vessels into active shipping lanes suggests Iran is keen to resume its oil trade operations in anticipation of a potential diplomatic resolution.