Three Iranian supertankers have pierced the American naval blockade in the Gulf of Oman, carrying the Islamic Republic’s first crude exports since the cordon was imposed in mid-April. Maritime intelligence firm TankerTrackers, corroborating satellite imagery with digital transponder data, confirmed that the very large crude carriers Diona and Hero II, along with the Suezmax-class Sonia I, crossed the perimeter late on Tuesday. Together they haul an estimated 4.8 million barrels of Iranian crude, now steaming eastwards towards Asian markets.

Viewed from Washington, the passage marks the first operational test of a framework agreement announced by President Donald Trump on Sunday. “I fully authorise the free reopening of the Strait of Hormuz and, concurrently, the immediate removal of the United States naval blockade,” Trump wrote on his Truth Social platform, adding: “Ships of the world, start your engines. Let the oil flow again!” The White House has disclosed few details, but officials in Tehran have characterised the memorandum—due to be signed in Switzerland on Friday—as a preliminary step that immediately lifts the blockade and permits Iran to resume oil sales, with a broader peace accord to be negotiated within sixty days.

For two months, the US Navy had effectively sealed off Iran’s main export route, choking off the lifeblood of an economy already battered by sanctions. The blockade, imposed on 13 April amid spiralling regional hostilities, halted virtually all Iranian crude shipments. TankerTrackers noted that the three vessels were the first to exit the restricted zone since then, a development that analysts in London say could add modest volumes to global supply at a time when Brent crude has slipped below $80 a barrel. However, demand from China—Iran’s largest remaining customer—remains lacklustre, constrained by weak domestic refining margins, tempering expectations of an immediate flood of Iranian barrels.

From Singapore, where the Sonia I is reportedly headed, shipping data from Kpler and Vortexa confirm the tankers’ easterly courses. The Diona and Hero II, each laden with two million barrels, are also bound for Asian discharge points. The resumption, while tentative, is being read in Gulf capitals and European chancelleries as a tangible de-escalatory gesture, though scepticism persists over whether the framework can hold. The Strait of Hormuz, through which roughly a fifth of the world’s oil transits, has been the theatre of repeated brinkmanship, and the blockade’s removal is as much a logistical relief as a political signal.

Looking ahead, the success of the broader peace process will hinge on whether the initial goodwill survives the sixty-day negotiation window. For now, the sight of Iranian hulls slicing through waters that until this week were a no-go zone offers a fragile but unmistakable sign that the machinery of diplomacy, however halting, can still turn the tide of conflict.