US CENTCOM: ‘No Ships Made It Past’ Strait of Hormuz Blockade in First 24 Hours
Published on Reflecto News | World News | Defense & Energy Security
The United States military has declared initial success in enforcing its sweeping naval blockade of Iranian ports, with US Central Command (CENTCOM) reporting that “no ships made it past the U.S. blockade” during the first 24 hours of the operation. More than 10,000 American personnel, over a dozen warships, and dozens of aircraft are currently involved in enforcing the maritime embargo, which began at 10:00 a.m. Eastern Time on Monday, April 13, 2026 .
CENTCOM further reported that six merchant vessels complied with directions from U.S. forces to turn around and re-enter an Iranian port on the Gulf of Oman, indicating that the blockade is having an immediate deterrent effect on shipping attempting to access Iranian ports .
The Blockade’s Legal Framework
The blockade is being enforced “impartially” against vessels of all nations entering or departing Iranian ports and coastal areas, including all Iranian ports on the Arabian Gulf and the Gulf of Oman . However, CENTCOM has made a critical distinction: U.S. forces “will not impede freedom of navigation for vessels transiting the Strait of Hormuz to and from non-Iranian ports” .
| Category | Treatment Under Blockade |
|---|---|
| Vessels entering/departing Iranian ports | Subject to interception, diversion, or capture |
| Vessels transiting to/from non-Iranian ports | Freedom of navigation continues |
| Vessels that paid tolls to Iran | Trump ordered Navy to interdict “every vessel in international waters” that paid illegal tolls |
This legal distinction is crucial for understanding the blockade’s scope. The operation targets Iran’s oil export revenue—estimated at approximately 1.8 million barrels per day—while theoretically allowing continued transit for ships not engaged in Iranian trade .
The Enforcement Challenge: Conflicting Data
While CENTCOM has touted success, independent maritime tracking data suggests a more complex picture. According to Kpler, at least two ships departing Iranian ports successfully crossed the Strait of Hormuz on Monday after the blockade came into effect .
Vessels reported crossing the strait:
- Christianna: Liberia-flagged bulk carrier that passed after unloading cargo at Bandar Imam Khomeini
- Elpis: Comoros-flagged tanker carrying methanol from the Iranian port of Bushehr
- Rich Starry: Chinese-linked tanker under active U.S. sanctions that made two attempts to transit before successfully passing
The Rich Starry’s passage is particularly significant. The vessel, owned by Shanghai Xuanrun Shipping Co Ltd—a company blacklisted by the U.S. Treasury for dealings with Iran—initially approached the strait shortly after the blockade began and turned back, before resuming its journey hours later . During its renewed transit attempt, the vessel broadcast that it has a Chinese owner and crew, a move interpreted by analysts as a deliberate test of Washington’s enforcement resolve .
A second sanctioned vessel, the Murlikishan, was also tracked transiting the strait . Analysts suggest that at least seven ships have made it through the blockade in total, including four tankers linked to Iran .
The ‘Dark Fleet’ Factor
The apparent discrepancy between CENTCOM’s claims and shipping data may be explained by the nature of the vessels involved. Iran has maintained its oil exports through a so-called “dark fleet” of vessels that operate with opaque ownership and tracking practices to evade sanctions . These ships often switch off their Automatic Identification System (AIS) transponders or manipulate their signals, making them difficult to track and intercept.
Since early March, Iran has been exporting around 1.8 million barrels of crude per day by sea, supported in large part by this shadow fleet . The effectiveness of any blockade depends heavily on the ability to interdict these covert operations—a challenge that has historically proven difficult for naval forces.
The Strategic Double-Bind
The blockade presents the Trump administration with a difficult balancing act. Directly confronting foreign tankers, including those linked to China, India, or Pakistan, could risk major diplomatic incidents and further escalation . China has already condemned the move as “dangerous and irresponsible,” while analysts warn that any prolonged disruption in Hormuz could have ripple effects across global markets .
At the same time, failing to enforce the blockade strictly could undermine its strategic intent. The operation is designed to cut off Iran’s oil revenue—the regime’s primary source of foreign currency—and force Tehran back to the negotiating table following the collapse of peace talks in Islamabad .
President Trump has made clear his intention to pressure not only Iran but also countries that continue to purchase Iranian oil. He instructed the U.S. Navy to “seek and interdict every vessel in International Waters that has paid a toll to Iran,” declaring that “no one who pays an illegal toll will have safe passage on the high seas” .
Iran’s Response: Threats of Retaliation
Iran has responded with defiance and threats of retaliation. The Islamic Revolutionary Guard Corps (IRGC) has declared that “security in the ports of the Persian Gulf and the Sea of Oman will either be for everyone, or for no one,” warning that if the security of Iran’s ports is threatened, “no port in these waters will remain safe” .
Iranian naval commander Shahram Irani dismissed the blockade as “ridiculous,” while the IRGC warned that any military vessels approaching the strait under any pretext would be regarded as a ceasefire violation and dealt with accordingly .
Global Market Impact
The Strait of Hormuz handles roughly one-fifth of the world’s crude oil shipments, making any sustained disruption significant for global energy markets . Oil prices have already reacted sharply, jumping above $100 per barrel in early Asian trading following the blockade announcement .
Rapidan Energy Group CEO Scott Modell told Newsweek that Trump is “essentially accepting higher oil prices as the cost of building this additional leverage, betting that American tolerance for $4-plus gasoline is greater than Iran’s willingness to withstand economic pain” .
However, the global economic pain will likely continue regardless of the blockade’s effectiveness. International shipping is expected to continue avoiding the strait due to sky-high insurance premiums and fears of a resumption of Iranian strikes in the Gulf if the ceasefire breaks down .
What Comes Next
As the blockade enters its second day, several critical questions remain:
| Question | Implication |
|---|---|
| Will the U.S. take enforcement action against vessels that have already transited? | A direct confrontation with Chinese state-linked vessels could spark a major diplomatic incident |
| How will the “dark fleet” be tracked and intercepted? | Success depends on ability to interdict vessels operating without transponders |
| Will other nations challenge the blockade? | India, Pakistan, and others may test enforcement |
| Can the ceasefire hold? | The two-week truce remains fragile; any incident could trigger wider conflict |
For now, the U.S. has declared its blockade a success. But the reality on the water—where sanctioned tankers continue to slip through—suggests that enforcing a complete maritime embargo in one of the world’s busiest chokepoints is far more complex than official statements suggest.
Frequently Asked Questions (FAQs)
1. Did any ships breach the U.S. blockade of Iranian ports?
The U.S. military says no ships breached the blockade, reporting that six merchant vessels turned back after encountering U.S. forces. However, independent shipping data indicates that at least two ships departing Iranian ports—and possibly as many as seven—successfully transited the strait on Monday, including sanctioned vessels .
2. Why is there a discrepancy between CENTCOM’s claim and shipping data?
The discrepancy may be explained by the legal distinction in the blockade’s enforcement. CENTCOM’s blockade applies to vessels “entering or departing Iranian ports,” while vessels transiting to non-Iranian ports are not impeded . Additionally, Iran’s “dark fleet” operates with tracking systems turned off, making independent verification difficult .
3. What is the “dark fleet”?
The “dark fleet” refers to vessels that operate with opaque ownership and tracking practices to evade sanctions. Iran has been exporting around 1.8 million barrels of crude per day by sea since early March, supported in large part by this shadow fleet .
4. How has China responded to the blockade?
China has condemned the blockade as “dangerous and irresponsible,” and a Chinese-linked tanker under active U.S. sanctions successfully transited the strait after the blockade began, in what analysts interpret as a test of Washington’s resolve .
5. What is the impact on global oil prices?
Oil prices have jumped above $100 per barrel following the blockade announcement. The Strait of Hormuz handles roughly one-fifth of the world’s crude oil shipments, and any sustained disruption could trigger a major supply shock .
6. Is the ceasefire still in effect?
The two-week ceasefire announced on April 7 remains in effect but is increasingly fragile. The IRGC has warned that any military vessels approaching the strait under any pretext would be regarded as a ceasefire violation .
7. How long will the blockade last?
No timeline has been announced. The blockade is intended to pressure Iran to return to negotiations following the collapse of peace talks in Islamabad
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