Full Breakdown
Oil Tankers Navigate Blockaded Strait of Hormuz Amid U.S. Enforcement and Regional Tensions
5/13/2026, 11:32:33 PM
Transit Attempts Under U.S. Blockade
In early May 2024, three very large crude carriers (VLCCs) each carrying roughly 2 million barrels of Iraqi Basrah Medium or Upper Zakum crude exited the Strait of Hormuz with AIS transponders disabled. The vessels—Agios Fanourios I, Kiara M, and the Chinese-owned Yuan Hua Hu—were redirected or halted by U.S. naval forces enforcing a blockade aimed at Iranian-linked shipping.
Background: U.S. Naval Blockade and Regional Conflict
Following the February 28 outbreak of the U.S.–Iran–Israel war, the U.S. Navy expanded its blockade to restrict cargoes deemed contraband while allowing other Gulf oil exports to pass. The strait, which carries about one-fifth of global oil, has seen hundreds of ships stranded and a sharp decline in commercial traffic.
Key Actors
- U.S. Central Command (CENTCOM) – enforces the blockade and issues redirection orders.
- PetroVietnam Oil (PVOIL) – Vietnam’s state oil trading arm, owner of the cargo on Agios Fanourios I.
- Eastern Mediterranean Maritime – manager of Agios Fanourios I.
- COSCO Shipping Energy Transportation & Sinopec – owners and charterers of Yuan Hua Hu.
- Kpler and LSEG – commercial ship-tracking services providing movement data.
Timeline of Recent Movements
- 17 Apr – Agios Fanourios I loads 1.99 M bbl Basrah Medium in Iraq.
- 1 May – Basrah Energy loads Upper Zakum crude (2 M bbl) at ADNOC’s Zirku terminal.
- 6 May – Basrah Energy exits the strait; 8 May it offloads at Fujairah.
- 10 May – Yuan Hua Hu and Kiara M transit the strait; Agios Fanourios I also exits.
- 11 May – Agios Fanourios I makes a U-turn near the U.S. blockade line.
- 12 May – PVOIL sends a letter urging the U.S. to allow passage.
- 13 May – CENTCOM confirms the vessel was redirected as part of blockade enforcement.
Data and Statistics
- Each of the three VLCCs carried ~2 million barrels of crude.
- Kpler reported 42 container ships still stuck, nine successfully exited, and two seized (source 8).
- Saudi Aramco’s CEO cited a loss of 100 million barrels per week of supply (source 4).
- The strait handles roughly 20 % of world oil shipments.
Impact on Energy Supply and Vietnam
Vietnam’s Nghi Son refinery depends on the cargo for feedstock; PVOIL warned that any delay could halt refinery throughput, affecting millions of Vietnamese consumers and businesses. The broader blockade threatens global oil flow, raising insurance costs and price volatility.
Official Statements & Responses
U.S. Central Command said the vessel was redirected to enforce the blockade against Iran. PVOIL’s letter emphasized the cargo’s critical importance to Vietnam’s energy security. President Trump, speaking before his China visit, downplayed the need for Chinese assistance in resolving the Iran conflict. An Iranian army spokesperson framed control of the strait as a long-term strategic revenue source.
Criticism & Opposition
Vietnam’s request highlighted perceived overreach of the U.S. blockade, arguing the cargo is not contraband. Independent analyst MenchOsint blamed the United States for any global economic fallout, stating, “If the global economy is collapsing, it is not Iran’s fault — it is America’s.”
On-the-Ground Reports
Satellite and MarineTraffic data showed Agios Fanourios I completing a mid-ocean U-turn after clearing the strait. Yuan Hua Hu anchored off the Gulf of Oman near the U.S. blockade line. Kiara M remained in the Gulf of Oman with its transponder off.
Conflicting Reports & Gaps
The destination of Kiara M was not disclosed, and U.S. officials did not confirm whether Agios Fanourios I will ultimately be permitted to proceed to Vietnam. Sources differ on whether the blockade applies to all Gulf oil cargoes or only those deemed contraband.
Verbatim Quotes
- “This cargo is of extreme importance to Nghi Son Refinery, to the Socialist Republic of Vietnam and to the Vietnamese people,” — Hoang Dinh Tung, Vice President, PVOIL
- “Any further delay risks halting refinery throughput, with cascading consequences for millions of Vietnamese consumers, businesses, public services and industries.” — Hoang Dinh Tung, PVOIL
- “U.S. forces redirected the vessel as part of ongoing enforcement of the blockade against Iran,” — U.S. Central Command
- “I don't think we need any help with Iran. We'll win it one way or the other, peacefully or otherwise,” — President Donald Trump, reporters in Washington
- “If the global economy is collapsing, it is not Iran’s fault — it is America’s.” — MenchOsint, maritime-monitoring account
What’s Next
President Trump’s meeting with President Xi in Beijing is expected to address the Hormuz blockade alongside broader trade and security issues. U.S. naval enforcement is likely to continue, while Vietnam and other oil-importing nations monitor the situation for further diplomatic engagement.
