What is a naval blockade and how would it work in Strait of Hormuz?
What is a naval blockade and how would it work in Strait of Hormuz?
President Donald Trump declared the United States would initiate a naval blockade of the Strait of Hormuz after diplomatic discussions with Iran did not yield an agreement to end hostilities. The strait, a critical corridor for maritime traffic, facilitates the movement of approximately 20% of the world’s oil and gas shipments. Iran had effectively restricted passage through the waterway as part of its military strategy, according to Trump.
The U.S. leader asserted that negotiations in Pakistan collapsed because Iran refused to abandon its nuclear aspirations. A representative from Iran’s foreign ministry condemned the “excessive demands and unlawful requests” made by the U.S. Meanwhile, Mohammad Bagher Ghalibaf, head of Iran’s parliament, noted that “the opposing side ultimately failed to gain the trust of the Iranian delegation in this round of negotiations.”
Blockade Strategy and Legal Framework
On Sunday, Trump announced the U.S. Navy would begin intercepting all vessels attempting to transit the strait. “We’re not letting Iran profit by choosing whom to supply oil to,” he stated. The commander-in-chief emphasized an “all or none” approach, vowing to destroy mines placed by Iran in the region. “Any Iranian who attacks us or peaceful ships will be BLOWN TO HELL!” he declared.
“A blockade is a belligerent operation to prevent vessels and/or aircraft from entering or exiting specified ports, airfields, or coastal areas under enemy control,” explained a 2022 U.S. Navy manual on maritime law.
Trump also mentioned that NATO allies would join the effort, though he did not specify which countries. The BBC learned the UK would not participate. However, he noted that the UK—alongside other NATO members—would deploy minesweepers to clear the strait. A UK government statement reiterated support for free navigation, stressing the need to “ensure the Strait of Hormuz remains open and accessible.”
Legal Concerns and Strategic Implications
Three U.S. legal experts raised questions about the legality of the blockade, suggesting it might conflict with maritime law. One expert doubted whether military enforcement would breach the existing ceasefire terms. The strait’s narrow geography has historically allowed Iran to exert pressure by blocking traffic, thereby inflating oil prices. By closing the waterway, Trump aims to disrupt Iran’s revenue but could inadvertently drive energy costs higher.
Analysts argue that Trump’s move is designed to push Iran into accepting U.S.-preferred terms. On “Face the Nation,” Republican congressman Mike Turner of Ohio supported the blockade as a way to force a resolution to the situation in the strait.
