WSJ: “Dark shipping” rises as vessels avoid detection in Persian Gulf

Commercial vessels transiting the Strait of Hormuz are increasingly adopting evasive measures, including disabling tracking systems and moving in small groups, as regional tensions continue to disrupt maritime security, according to The Wall Street Journal (WSJ).

Some tankers, including major oil and liquefied natural gas carriers, have shifted to so-called “dark shipping” practices. This involves switching off onboard lights and AIS transponders—systems designed for navigation and collision avoidance—making the vessels less visible to monitoring networks but significantly increasing the risk of maritime accidents.

Amid the heightened risk environment, certain shipowners are coordinating with the U.S. military, receiving navigational guidance while passing through the strategic waterway. U.S. forces are reportedly deploying radar systems, drones, and other surveillance capabilities to track vessel movements and help manage safe transit.

The report also notes that some shipping routes now run closer to Oman’s coastline. In the past, U.S. forces operating under “Project Freedom” allegedly supported safer passage in the area using underwater technologies. However, the majority of vessels are currently either following routes designated by Iran or navigating without active tracking systems.

The deteriorating security situation is placing increasing strain on the global shipping industry. Insurance costs have surged, some tankers remain idle, and crews are being offered additional compensation for operating in a high-risk zone.

Traffic through the Strait of Hormuz has also declined. While the corridor previously handled more than 100 vessels daily, volumes have dropped significantly amid ongoing threats and uncertainty.

By Tamilla Hasanova