Oman’s New Shipping Route Pressures Iran Over Control of Strategic Strait of Hormuz

As the United States and Iran prepare to resume diplomatic talks on their memorandum of understanding, recent military exchanges around the Strait of Hormuz reveal a deeper strategic conflict. Iran views control over the Strait of Hormuz, a vital global shipping route, as its most significant leverage against Washington. The recent announcement by Oman and the International Maritime Organization (IMO) of a new shipping lane exclusively within Omani territorial waters is seen in Tehran as a direct threat to its influence and a move that could undermine Iran’s ability to use the strait as a bargaining chip.

Iran fears that if commercial vessels can transit the strait without Iranian coordination or oversight, it will lose a key tool of pressure in both future nuclear negotiations and potential renewed conflict with the U.S. Ali Vaez, a senior Iran expert at the International Crisis Group, told The New York Times that Iran needs this leverage in all scenarios and would not allow it to erode before a final agreement is reached. Historically, Iran’s nuclear program was its main deterrent asset, but recent conflicts have elevated its capacity to disrupt traffic through the strait, which handles about one-fifth of the world’s oil supply, to equal strategic importance.

Tehran suspects the Trump administration might use a temporary deal to ease economic and political pressures ahead of U.S. midterm elections, only to return to military confrontation later. This concern intensified after U.S. Secretary of State Marco Rubio’s Gulf visit emphasized restoring full freedom of navigation in the strait, followed by Oman’s new route announcement, which Iran interpreted as an attempt to bypass its control.

Iran’s swift response included an attack on a Singapore-flagged container ship using the new route, which triggered U.S. retaliatory strikes on Iranian targets and subsequent Iranian counterattacks, nearly collapsing the fragile ceasefire. Iranian Foreign Minister Abbas Araghchi warned that any attempt to circumvent Iranian oversight would escalate tensions and delay reopening the strait.

Iran also views Oman and the IMO’s unilateral promotion of the new route as violating the memorandum’s clause assigning Iran responsibility for securing the strait and requiring coordination with Oman. Despite the heightened tensions, both Washington and Tehran reportedly agreed to halt attacks and allow free navigation while continuing technical talks. A meeting is expected in Doha this week to address the dispute. Meanwhile, Iran and Oman have initiated official talks to establish a joint management mechanism for the strait, underscoring the ongoing sensitivity of control over Hormuz in U.S.-Iran relations.