Hormuz Opening
Overview
The Hormuz Opening (Strait of Hormuz Opening) refers to international efforts to maintain and ensure freedom of navigation in the Strait of Hormuz, which connects the Persian Gulf and the Gulf of Oman, and the geopolitical issues entangled with them. Because about 20% of the world's seaborne crude oil traffic and about 20% of liquefied natural gas (LNG) pass through this narrow strait, whether the strait is blocked or opened has a direct impact on international energy security, oil prices, and the global economy as a whole. Therefore, the Hormuz Opening is not merely a shipping route issue but a complex matter intertwining security, diplomacy, and economics surrounding Iran.
Main Content
Geopolitical Background
The Strait of Hormuz lies between Iran and Oman (Musandam Peninsula), and at its narrowest point it is only about 21 nautical miles (about 39 km) wide. The navigation route passes through Iranian territorial waters and Omani territorial waters, and oil tankers must use a narrow route about 3 km wide. Most of the crude oil and gas exports of Gulf oil-producing countries such as Saudi Arabia, the United Arab Emirates, Kuwait, Iraq, and Qatar pass through this strait, and it is estimated that about 20 million barrels of oil per day pass through it.
Historical Context
During the Iran-Iraq War in the 1980s, the so-called 'Tanker War' broke out as both sides attacked oil tankers, and in 1987–88 the United States conducted Operation Earnest Will to escort Kuwaiti oil tankers. After the United States withdrew from the Iran nuclear deal (JCPOA) in 2018 and restored sanctions, tensions rose again, and in 2019 there were successive incidents including tanker attacks and the seizure of a British tanker. After the assassination of Commander Qasem Soleimani in 2020, the possibility of Iran blocking the strait came to the fore again due to threats of retaliation.
International Law and Freedom of Navigation
The United Nations Convention on the Law of the Sea (UNCLOS) guarantees 'transit passage' through straits used for international navigation. While the United States and the West define Hormuz as an international strait and emphasize the right to maintain freedom of navigation, Iran has asserted control based on the sovereignty and security of its territorial waters. The United States maintains the Fifth Fleet in Bahrain and is responsible for maritime security in the Gulf region, and has operated a joint patrol and escort system with Gulf Cooperation Council (GCC) member states.
Blockade Threats and Alternative Routes
Iran has repeatedly threatened to block the strait during periods of intensified sanctions or military pressure. However, a complete blockade would also be fatal to Iran's own oil exports and trade with friendly countries such as China, so it is often used as negotiating leverage rather than actually implemented. Saudi Arabia and the United Arab Emirates are partially diversifying blockade risks through pipelines that bypass the strait (the East-West Pipeline, the Abu Dhabi Krepatt–Fujairah line, etc.).
Recent Trends
Since 2024, as the Israel-Hamas war expanded, attacks by Yemen's Houthi rebels on Red Sea commercial ships continued, increasing instability across Middle Eastern maritime logistics adjacent to Hormuz. In April and October 2024, direct retaliatory attacks between Iran and Israel occurred, temporarily heightening concerns about a Hormuz blockade, and insurance premiums and freight rates soared. Entering 2025, the Trump administration in the United States reaffirmed a policy of 'maximum pressure' on Iran and strengthened crude oil export sanctions, while Iran responded by expanding its nuclear program and making statements about controlling the strait. At the same time, Asian importers such as China and India are diversifying supply lines to Russia, Africa, and the Americas to reduce dependence on the Middle East, and are expanding strategic petroleum reserves and maritime escort capabilities. International oil prices react sensitively to news of Hormuz tensions, showing a repeating pattern in which a geopolitical premium is added and then subsides.
Related Topics
- [[Strait of Hormuz]]
- [[Persian Gulf]]
- [[Crude oil]]
- [[Iran nuclear negotiations]]
- [[Law of the Sea]]
- [[Red Sea logistics crisis]]