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 the Strait of Hormuz?
On Monday, the US military announced plans to enforce a blockade targeting all maritime traffic linked to Iranian ports. This move follows stalled negotiations between the two nations, which had been ongoing since the conflict began on 28 February. The blockade aims to restrict vessels from entering or exiting Iranian-controlled coastal areas, though ships traveling between non-Iranian ports would still be permitted to pass through the Strait of Hormuz, a vital chokepoint for global oil shipments.
US President Donald Trump highlighted the action in a post on Truth Social, stating that the Navy would “BLOCKADING any and all Ships trying to enter, or leave, the Strait of Hormuz.” He emphasized that vessels paying an illegal toll to Iran would face disruption, vowing to “seek and interdict every vessel in International Waters” associated with the country. Additionally, Trump mentioned the deployment of minesweepers to dismantle Iranian mines in the strait, declaring that “Any Iranian who fires at us, or at peaceful vessels, will be BLOWN TO HELL!”
Legal Framework and Implementation
The US Navy Commander’s handbook from 2022 defines a naval blockade as a “belligerent operation to prevent vessels and/or aircraft of all States, enemy and neutral, from entering or exiting specified ports, airfields, or coastal areas belonging to, occupied by, or under the control of an enemy State.” Initially, Trump claimed the blockade would take effect “effective immediately,” but later specified it would be “enforced pretty soon” after a delay. The US Central Command (Centcom) confirmed the operation would begin at 10:00 EDT (15:00 BST) on Monday, targeting Iranian ports in the Arabian Gulf and Gulf of Oman.
Centcom assured that vessels heading to non-Iranian destinations would not be hindered, with a formal notice provided to commercial mariners beforehand. While Trump mentioned NATO’s involvement in “cleaning out” the strait, he did not name specific countries. The UK, a NATO member, has reportedly opted not to join the blockade, as noted by the BBC. A UK Government spokesperson stressed that the Strait of Hormuz “must not be subject to tolling” and confirmed collaboration with France and other allies to safeguard navigation freedoms.
Strategic Implications and Legal Concerns
Legal analysts in the US raised questions about the blockade’s compliance with maritime law, noting potential violations if implemented without clear consent. One expert also pondered whether the blockade, conducted through military force, would conflict with the existing ceasefire agreement. The Strait of Hormuz’s narrow geography has long enabled Iran to exert control, using it as leverage to halt traffic and inflate oil prices by restricting passage. By closing the waterway, the US seeks to cut Iran’s revenue, though this could escalate tensions and risk global energy supply disruptions.
Trump’s strategy hinges on forcing Iran to “open the Strait of Hormuz and get it running fast,” as he reiterated in a post. His administration’s actions underscore a shift toward direct military measures to pressure Tehran, even as allies like the UK remain focused on maintaining open trade routes and stabilizing the global economy.
