What is a naval blockade and how would it work in Strait of Hormuz?
Understanding Naval Blockades: The U.S. Strategy in the Strait of Hormuz
The U.S. military announced plans to impose a blockade targeting all maritime traffic destined for or departing Iranian ports. This measure, set to begin on Monday, would permit vessels from other nations to traverse the Strait of Hormuz, a vital waterway Iran had previously restricted following U.S.-Israeli strikes. The decision follows stalled negotiations between the two sides, which had aimed to halt the conflict that began on 28 February.
Trump’s Statements on the Blockade
President Donald Trump, in a post on Truth Social, declared the U.S. would initiate a “BLOCKADING any and all Ships trying to enter, or leave, the Strait of Hormuz.” He emphasized that the Navy would intercept vessels in international waters that had paid a toll to Iran, stating,
“No one who pays an illegal toll will have safe passage on the high seas.”
Trump also mentioned the destruction of Iranian mines in the strait, asserting,
“Any Iranian who fires at us, or at peaceful vessels, will be BLOWN TO HELL!”
Centcom’s Implementation Details
The U.S. Central Command (Centcom) outlined that the blockade would commence at 10:00 EDT (15:00 BST) on Monday.
“The blockade will be enforced impartially against vessels of all nations entering or departing Iranian ports and coastal areas, including all Iranian ports on the Arabian Gulf and Gulf of Oman,”
the statement read. It added that ships transiting to and from non-Iranian ports would remain unaffected, with commercial mariners receiving formal notices prior to enforcement.
UK’s Role and Legal Concerns
Trump mentioned collaboration with other countries for the blockade but did not specify which nations. The BBC learned the UK would not participate in the operation. A UK Government spokesperson reiterated support for freedom of navigation, stating,
“We continue to support freedom of navigation and the opening of the Strait of Hormuz, which is urgently needed to support the global economy and the cost of living back home.”
They also noted the strait should “not be subject to tolling” and highlighted efforts with France and allies to establish a coalition for its protection.
Strategic Implications and Legal Questions
Legal scholars in the U.S. raised concerns about the blockade’s compliance with maritime law. One questioned whether the military enforcement would breach the existing ceasefire agreement. The strait’s narrow geography has historically allowed Iran to exert influence, using it to block ships and inflate oil prices. By closing the passage, Trump aims to disrupt Iran’s revenue streams, though this could escalate tensions.