One Waterway, One-Fifth of the World’s Oil
The Strait of Hormuz spans just 21 nautical miles at its narrowest navigable point, yet this slender corridor carries approximately one-fifth of all oil supplied globally under normal conditions. Persian Gulf producers including Saudi Arabia, Iraq, Kuwait, Qatar, and the UAE funnel their exports through this single chokepoint toward Asian, European, and global refining markets.
The concentration of supply through one passage creates an inherent structural vulnerability in global energy architecture. Unlike pipeline networks, which can be rerouted or expanded, maritime chokepoints cannot be duplicated. The only credible alternative for Persian Gulf crude — the East-West Pipeline running across Saudi Arabia to Yanbu on the Red Sea — has a maximum capacity of roughly 5 million barrels per day, far below the 15 to 17 million barrels per day that typically transits Hormuz during peak periods.
Why Tankers Are Turning Off Their Trackers
The AIS System and Its Limitations in Conflict Zones
Automatic Identification System technology was designed to prevent maritime collisions and improve port traffic management. Every commercial vessel above a certain tonnage is legally obligated under the International Maritime Organization’s SOLAS convention to operate with AIS active. The system broadcasts a vessel’s identity, position, speed, course, and destination to nearby ships and shore stations.
In peacetime, this is a routine safety feature. In an active conflict zone, however, it becomes a targeting vector. According to Reuters, when tankers exit the Strait of Hormuz with crude oil under current conditions, many are doing so with their AIS transponders deliberately deactivated. This practice, often described in shipping intelligence circles as going dark, is not new. It has been observed in earlier periods of Persian Gulf tension, during the 2019 tanker incident surge, and throughout the Red Sea disruptions of 2023 and 2024.
The reasons operators choose to deactivate AIS in conflict corridors typically include: targeting risk reduction — broadcasting real-time position in a zone where vessels face hostile attention increases exposure to interdiction.
Original Article: Crude Oil Tankers Exit the Strait of Hormuz: What’s Happening — Com