What is a Naval Blockade and How Would It Work in the Strait of Hormuz?
The US military announced plans to implement a maritime blockade targeting all vessels attempting to access Iranian ports. This move follows stalled negotiations between the two nations, which began on 28 February. Despite efforts to resolve tensions, talks in Pakistan reportedly collapsed due to Iran’s refusal to abandon its nuclear ambitions, as claimed by US President Donald Trump. In response, the US has vowed to restrict movement in the critical Strait of Hormuz, a key passage for global oil trade.
“I have also instructed our Navy to seek and interdict every vessel in International Waters that has paid a toll to Iran. No one who pays an illegal toll will have safe passage on the high seas,” Trump said.
Centcom, the US Central Command, confirmed the blockade would start at 10:00 EDT on Monday. It emphasized the policy would apply impartially to all nations’ ships transiting Iranian ports and coastal areas. However, vessels moving between non-Iranian ports would remain unaffected, with detailed guidance provided to commercial mariners before enforcement.
The blockade, described by Trump as an “all or none” strategy, aims to disrupt Iran’s ability to control the strait. He stated the US would deploy minesweepers to clear Iranian-planted mines, while also coordinating with NATO allies. “I understand the UK and a couple of other countries are sending minesweepers,” he added, highlighting potential international collaboration.
Iran’s foreign ministry accused the US of imposing “excessive demands and unlawful requests” during failed talks. Meanwhile, UK officials affirmed their commitment to maintaining freedom of navigation, noting the strait’s importance for the global economy. “We are urgently working with France and other partners to build a coalition against tolling,” a spokesperson said.
Legal Implications of the Blockade
Three US legal experts questioned whether the blockade could breach international maritime law. They cited the 2022 Navy Commander’s handbook, which defines a blockade as a military effort to block vessels from entering or exiting enemy-controlled areas. While the policy targets Iranian ports, its impact on neutral ships could spark debate, especially given the ongoing ceasefire agreement.
The strategic location of the Strait of Hormuz has long enabled Iran to exert influence over global oil supply. By selectively restricting passage and charging high tolls, Tehran has manipulated oil prices. Closing the strait entirely would sever a major revenue stream, though it risks escalating tensions and potential retaliation.
