Iran/United States, April 15: At least two vessels reportedly transited through the strategically critical Strait of Hormuz en route to Iranian ports after altering their tracking data, raising fresh questions over the effectiveness of a US-led maritime blockade on Iran, according to a report by British shipping media.
The development comes days after the United States imposed a sweeping blockade targeting ships entering and leaving Iranian ports amid escalating tensions in West Asia. The report by Lloyd’s List indicated that some vessels changed their Automatic Identification System (AIS) destination signals while passing through the Strait, masking their actual routes.
According to the report, at least two Iran-flagged container ships that initially listed their destination as Bandar Abbas later modified their AIS data to display a broader term, “PG Ports,” referring to Persian Gulf ports. After successfully navigating the Strait, the vessels reportedly resumed their course toward the southern Iranian port of Bandar Abbas.
Analysts cited in the report suggested that such tactics could complicate the intelligence and surveillance operations underpinning the US blockade, potentially requiring additional resources to track maritime traffic effectively. The use of altered AIS signals highlights the evolving challenges in enforcing restrictions in one of the world’s busiest and most strategically sensitive shipping lanes.
The Strait of Hormuz, a narrow passage linking the Persian Gulf to global markets, is a critical artery for global oil and trade flows. Any disruption or evasion in this corridor has immediate implications for international shipping, energy supplies, and regional security dynamics.
The US Central Command has stated that more than 10,000 personnel, including sailors, marines, and airmen, along with multiple warships and aircraft, are actively enforcing the blockade. The operation covers Iranian ports across both the Arabian Gulf and the Gulf of Oman, targeting vessels of all nationalities.
According to official statements, at least six merchant vessels have already complied with US directives to turn back after attempting to approach Iranian ports. The command also claimed that no ships had successfully breached the blockade within the first 24 hours of its enforcement.
However, the reported movement of vessels using AIS manipulation suggests potential gaps in monitoring and enforcement, particularly as maritime operators adapt to the new restrictions. Data from maritime analytics firm Kpler indicated that at least nine commercial vessels have crossed the Strait since Monday, even as overall traffic has sharply declined.
Shipping activity in the region has dropped dramatically, with daily vessel movements falling to less than 10 per cent of pre-conflict levels. Prior to the escalation on February 28, when US and Israeli forces launched joint military strikes against Iran, the Strait witnessed over 100 vessels transiting daily.
The blockade follows a broader escalation in tensions involving the US, Iran, and Israel, which has already triggered volatility across global energy and financial markets. Concerns over potential supply disruptions had earlier driven crude oil prices higher and heightened risk sentiment worldwide.
Adding to the tensions, US President Donald Trump issued a stern warning, stating that any Iranian vessel approaching the blockade could face military action. The remarks underscore the high-stakes nature of the standoff and the risks of further escalation in the region.
While diplomatic signals in recent days have hinted at possible negotiations, developments at sea indicate that enforcement and compliance challenges persist. The evolving situation in the Strait of Hormuz continues to be closely watched by global markets, shipping operators, and policymakers, given its critical role in international trade and energy security.
As maritime strategies adapt and geopolitical tensions remain fluid, the effectiveness of the blockade and the potential for further incidents in the region are likely to shape the next phase of the ongoing crisis.
