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?
Following the collapse of talks to end the ongoing conflict, the US military has announced plans to enforce a maritime blockade targeting all vessels attempting to enter or exit Iranian ports. The measure, set to begin on Monday, will allow ships from other nations to transit the Strait of Hormuz, a vital passage that Iran has sought to restrict in response to recent strikes by the US and Israel.
Blockade Details and US Strategy
US President Donald Trump emphasized that the Navy will intercept any vessel in international waters that has paid a toll to Iran, calling it an “all or none” approach. He also mentioned the destruction of Iranian mines in the strait, asserting that such actions would ensure safe passage for commercial traffic. The US Central Command confirmed the blockade would start at 10:00 EDT (15:00 BST) on Monday, with forces targeting Iranian-controlled ports in the Arabian Gulf and Gulf of Oman.
“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 stated in a post on Truth Social. He further claimed that Iran had “knowingly failed” to open the strait as promised, despite its role in the war’s escalation.
According to the 2022 US Navy Commander’s handbook, a naval blockade is defined as a “belligerent operation to prevent vessels and/or aircraft from entering or exiting specified ports, airfields, or coastal areas under enemy control.” Trump initially described the action as effective “immediately,” but later told Fox News it would “take a little while” to fully implement.
UK’s Role and Freedom of Navigation
The UK, a NATO ally, has not joined the blockade, according to the BBC. A government spokesperson noted that the country remains committed to supporting “freedom of navigation” and working with France and other partners to form a coalition protecting the strait. Centcom clarified that non-Iranian vessels would not be obstructed while moving between ports outside Iranian jurisdiction.
“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,”
the spokesperson added, stressing that the strait “must not be subject to tolling.”
Legal Concerns and Strategic Impact
Three US legal experts raised questions about the blockade’s compliance with maritime law, noting it could potentially violate international agreements. They also pondered whether the military enforcement would undermine the existing ceasefire. The strait’s narrow geography has historically given Iran leverage, allowing it to block ships and inflate oil prices. By sealing the passage, the US aims to disrupt Iran’s revenue streams, though this could escalate tensions.
Trump hinted at broader international involvement, though specific countries were not named. He highlighted that NATO has offered assistance in clearing mines, promising the strait will be “free to use again in not too long a distance.” The move underscores the strategic significance of the waterway, which connects the Persian Gulf to the open ocean and is critical for global energy trade.
