Three vessels hit by gunfire in Strait of Hormuz, crews safe
At least three merchant vessels were struck by gunfire in the Strait of Hormuz, with crews reported safe; one vessel, hit 15 nautical miles northeast of Oman...
What Happened
- At least three merchant vessels were struck by gunfire in the Strait of Hormuz, with crews reported safe; one vessel, hit 15 nautical miles northeast of Oman, suffered heavy damage to its bridge after an IRGC gunboat opened fire.
- The United Kingdom Maritime Trade Operations (UKMTO) confirmed the attacks and issued navigational warnings to commercial shipping in the region.
- Two Iranian gunboats targeted the VLCC Sanmar Herald despite the vessel having received prior clearance from Iranian authorities to transit the strait, exposing a disconnect within Iran's chain of command.
- The IRGC simultaneously seized two vessels — the Panama-flagged MSC Francesca and the Liberia-flagged Epaminondas — citing "operating without required authorisation" and "manipulating navigation systems."
- Iran had reimposed strict controls over the Strait of Hormuz in retaliation for the US-Israeli bombardment of the country and subsequently in response to a US naval blockade of Iranian ports, making these attacks part of an escalating pattern of maritime coercion.
Static Topic Bridges
The Strait of Hormuz: World's Most Critical Oil Chokepoint
The Strait of Hormuz is a narrow waterway — approximately 30 miles wide at its narrowest — connecting the Persian Gulf with the Gulf of Oman and the Arabian Sea. It lies between Iran (to the north) and Oman and the UAE (to the south). The strait serves as the sole maritime exit for the oil-producing states of the Persian Gulf.
- Over 21 million barrels of oil per day transited the strait in 2024–25, representing more than one-quarter of total global seaborne oil trade.
- Approximately 88% of all oil exported from the Persian Gulf (Saudi Arabia, UAE, Kuwait, Qatar, Iraq, Bahrain, and Iran) exits via the Strait of Hormuz.
- Around one-fifth of global LNG trade also passes through the strait, primarily from Qatar.
- The shipping lanes within the strait run primarily through Omani and partially through Iranian territorial waters.
- No practical alternative exists for bulk oil exports from the Gulf; bypass pipelines (e.g., Petroline in Saudi Arabia, ADCO pipeline in UAE) can only partially substitute.
Connection to this news: The IRGC's use of gunfire against merchant vessels directly threatens this irreplaceable chokepoint, causing freight insurance costs to spike and creating supply anxiety in global oil markets even before physical disruption materialises.
IRGC (Islamic Revolutionary Guard Corps): Mandate and Naval Role
The IRGC is a branch of the Iranian Armed Forces established after the 1979 Islamic Revolution. Unlike the conventional Iranian Navy, the IRGC operates its own naval wing — IRGC Navy (IRGCN) — which specifically patrols and controls the Persian Gulf and the Strait of Hormuz using fast-attack craft, gunboats, and coastal missile batteries. The IRGC answers to the Supreme Leader, not the elected government, creating the potential for actions that bypass civilian diplomatic channels.
- The IRGCN is designated a terrorist organisation by the United States (since 2019) and several other countries.
- It has a documented history of seizing foreign vessels: British tanker Stena Impero (2019), South Korean vessel MT Hankuk Chemi (2021), and multiple others.
- The IRGC operates under Article 150 of the Iranian Constitution, which mandates it safeguard the Islamic Revolution and its gains.
- The IRGCN employs swarm tactics, mines, and anti-ship missiles as asymmetric tools of maritime coercion.
Connection to this news: The gunfire incident fits the IRGCN's established doctrine of using maritime harassment as leverage during geopolitical standoffs, a tool separate from Iran's formal diplomatic posture.
Freedom of Navigation and UNCLOS Transit Passage
The United Nations Convention on the Law of the Sea (UNCLOS), adopted in 1982 and in force since 1994, governs rights over international waters. Part III of UNCLOS establishes the concept of "transit passage" for international straits — a right of continuous and expeditious passage through straits used for international navigation, applicable to all ships and aircraft of all nations without prior notification or permission from the coastal state.
- Transit passage (UNCLOS Articles 37–44) is broader than "innocent passage": coastal states cannot suspend or impede it even on security grounds.
- Iran signed UNCLOS in 1982 but has never ratified it, specifically because it rejects the transit passage regime that would limit its control over the strait.
- The United States also has not ratified UNCLOS, yet invokes its freedom of navigation provisions.
- Under customary international law, the freedom of navigation through international straits is binding even on non-signatories.
- UNCLOS Article 44 obliges coastal states not to hamper transit passage and to refrain from any discrimination among foreign ships.
Connection to this news: The IRGC attacks on vessels exercising transit passage constitute a direct violation of the freedom of navigation norm that underpins the global trading system, regardless of Iran's non-ratification of UNCLOS.
Key Facts & Data
- Strait of Hormuz: approximately 30 miles wide at its narrowest navigable point.
- Over 21 million barrels per day of oil flowed through the strait in 2024–25.
- The strait accounts for roughly one-quarter of global seaborne oil trade and one-fifth of global LNG trade.
- IRGC Navy operates independently of Iran's conventional military, reporting directly to the Supreme Leader.
- Three vessels confirmed struck by gunfire on April 22, 2026; two (MSC Francesca and Epaminondas) formally seized and transferred to Iranian shores.
- A third vessel, Euphoria, was also targeted and left disabled near the Iranian coast.
- UKMTO issues navigational advisories that are the primary real-time maritime safety alerts for commercial shipping in the region.
- Shipping insurance (war-risk premiums) for vessels transiting the Gulf of Oman surged following the attacks, raising freight costs globally.