Two very large crude carriers — the Hero II and the Hedy — crossed a U.S.-designated boundary into the Arabian Sea on April 20, satellite-tracking firm Vortexa said. Despite stepped-up U.S. naval patrols and public warnings against buyers and carriers, shipments linked to Iran are still reaching international waters, showing how trade routes and shadow logistics can blunt sanctions pressure. That matters because it undercuts Washington’s effort to choke off Tehran’s oil revenue and keeps crude flowing to buyers such as China and India, complicating enforcement and maritime insurance.
How shipments are slipping past the line Data collected by analytics firm Vortexa shows vessels tied to Iran finding ways to move crude despite tighter U.S. naval patrols. Vortexa observed the Hero II and the Hedy crossing the U.S.-designated line and heading into the Arabian Sea on April 20. Key tactics and detection methods - Many ships switch off automatic identification systems (AIS) to reduce electronic signatures. - Crews and operators use rendezvous at sea, mid-ocean cargo transfers and course changes to mask origin and destination. - Satellite imagery, provider data and intelligence tracking still reveal patterns of movement and transfers even when AIS is off. Those elements — seamanship techniques combined with modern satellite observation — help explain why tankers continue to slip past monitored areas. Washington’s response: interdictions and political pressure The U.S. has carried out interceptions and boarding operations beyond the immediate Gulf and has publicly warned it may add companies and ships to a blacklist and pursue vessels globally. Officials have also signaled tougher measures for entities that buy or carry Iranian crude to raise the costs for intermediaries and insurers. Interdiction at sea is operationally complex: boarding requires legal justification, an appropriate platform and follow-up processes to seize cargo or detain crew. That complexity creates openings for Iran’s networks and counterparties to adapt their methods. Who’s still taking Iranian crude? China remains the principal market, supported by long-standing logistical, financial and political links. India took deliveries earlier in the recent period, and other customers include a small number of states and regional partners. Where consignments ultimately end up is often opaque. Some cargoes likely feed refineries operated or financed by long-term partners; others may be blended at sea or swapped through intermediaries to obscure origin. The practical result is that a sizable portion of Iran-linked crude continues to reach global markets despite tighter rules on formal sales channels.Related Articles
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Vortexa’s tracking — including the recent crossings by the Hero II and the Hedy — shows multiple Iran-linked vessels moving past the U.S.-monitored line and out of the Strait of Hormuz, underscoring the practical limits of naval patrols and the adaptability of sanctions-evasion networks.
This article was created with AI assistance.
