US narrows military protection windows for tankers in the Strait of Hormuz

The United States has begun telling oil tankers crossing the Strait of Hormuz to travel at specific times if they want to receive military protection, according to reports cited on Saturday. The change comes after Iran stepped up attacks on vessels moving through the area at night. The Strait of Hormuz is one of the world's most important routes for oil and gas shipments, making any shift in security arrangements closely watched by shipping and energy markets.

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The reported instruction was sent to tanker operators through emails from the US naval coordination centre to maritime advisers, according to the report. Since May, Washington has been providing air protection to ships crossing the strait along a route near the coast of Oman on the southern side of the passage. In early September, that protection window was reduced to just two time slots per day, marking a tighter approach to escorting commercial traffic through the waterway.

The change reflects growing concern over attacks on shipping in the region and the limits of maintaining continuous air cover. The reported US approach is aimed at keeping commercial navigation protected without offering round-the-clock aerial support. That balance matters because the strait is a narrow chokepoint through which a large share of global energy trade passes, and any disruption can quickly affect freight costs, insurance and supply expectations.

The Strait of Hormuz has long been a flashpoint in wider tensions in the Middle East. It links the Gulf to the Arabian Sea and is central to the movement of crude oil and liquefied natural gas from producers in the region. When security conditions deteriorate there, governments, shipowners and traders often react quickly because even short-lived disruption can have wider economic consequences.

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The reported attacks at night add to the sense of risk for vessels transiting the area after dark. The new timing restrictions suggest that protection is being concentrated around periods judged to be safer or easier to cover. They also indicate that the US is trying to preserve a deterrent presence while adapting to a more volatile maritime threat environment.

What remains unclear is how widely the new timing guidance is being applied and whether it will change again if attacks continue. It is also not clear how ship operators will adjust schedules if the protection windows remain limited. For now, the development points to a more constrained security posture in one of the world's most sensitive shipping lanes.

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