The Strait of Hormuz, a 21‑mile-wide waterway linking the Persian Gulf to the Gulf of Oman, is bordered by Iran to the north and the United Arab Emirates (UAE) and Oman to the south. Iran controls the majority of the coastline, giving it strategic depth, while the UAE’s emirate of Abu Dhabi and Oman’s Musandam Peninsula host key ports that facilitate commercial traffic. Together these nations shape the physical environment through which roughly 20% of global petroleum passes each day.
International law, principally the United Nations Convention on the Law of the Sea (UNCLOS), designates straits used for international navigation as subject to the right of innocent passage. No single nation may unilaterally close the passage, yet states may enforce security zones. Historically, Iran has asserted the right to regulate traffic, leading to occasional confrontations, while the United States and allied navies conduct regular freedom‑of‑navigation operations to reaffirm the legal principle of open transit.