Weekly Graphic: Making Sense of Hormuz Traffic Data

Geopolitical Futures

Commercial vessel traffic through the Strait of Hormuz reached nearly 770 ships in October, approaching July’s wartime peak of 795, even as outgoing crude oil shipments dropped precipitously. Transponder data from the Strait of Hormuz Ship Monitor recorded only 39.5 million barrels passing through in October, down from 151.3 million barrels in July.

This severe decline stems from Iranian sea mine attacks on tankers along Oman's coastal route—including five vessels damaged on Nov. 5—alongside an ongoing U.S. blockade on Iranian crude. However, unrecorded passage remains higher as operators deactivate transponders, while Saudi Arabia, the UAE, Iraq, and Kuwait sustained combined exports of 15.5 million barrels per day in October. Gulf producers maintained supply by diverting crude through Saudi Arabia's Red Sea Port of Yanbu—which logged a 35 percent shipment surge—and the UAE’s Fujairah pipeline. Brent fell 7 percent on Nov. 2. Price volatility persisted following reported U.S. strikes on Iran's Qeshm Island.

Comment

Overland bypass infrastructure such as the Habshan–Fujairah pipeline provides Gulf energy exporters with critical strategic endurance during maritime interdiction campaigns in the Strait of Hormuz. By routing crude directly to the Gulf of Oman, pipeline systems mitigate immediate tactical denial imposed by sea mines and commerce raiding. However, fixed terrestrial export corridors present inherent capacity ceilings that cannot absorb total Persian Gulf maritime volumes. Maritime chokepoint vulnerability in Hormuz is shifted rather than eliminated.

The operational throughput of the Petroline network to Yanbu depends on high-pressure pumping stations that require continuous maintenance under heavy load. Pushing volume above baseline specifications accelerates mechanical wear across turbine units, creating sustainment bottlenecks at Red Sea marine terminals. Consequently, operational endurance during a prolonged Hormuz blockade hinges on spare pumping capacity rather than crude reserves at Yanbu.

Strategic Question for Discussion

Which factor presents a greater operational bottleneck during a prolonged interdiction of the Strait of Hormuz: the physical capacity limits of the Petroline network to Yanbu, or maritime security risks along alternative loading terminals in the Red Sea?

The physical throughput ceiling of Saudi Arabia's Petroline infrastructure represents the primary constraint, as pumping station mechanics limit sustained flow expansion regardless of terminal security. While naval escorts can temporarily mitigate littoral threats near Yanbu, pipeline maintenance schedules cannot be compressed indefinitely under continuous peak operation. The available evidence points toward mechanical degradation of inland transit networks as the ultimate limit on Gulf export endurance.

Share your assessment in the comments below.

Read the original article