Tankers navigating the Strait of Hormuz are increasingly opting to disable their Automatic Identification System (AIS) signals and introducing various security measures. This development emerged during a panel discussion at the Asia Pacific Petroleum Conference (APPEC) held on September 10, where industry experts highlighted the operational challenges arising from these actions.
The Current Situation
Max Tay, Repsol’s head of heavy products in Asia, described the AIS blackout as transforming the Strait of Hormuz into a “mysterious black box,” impeding traders and analysts in tracking vessel movements effectively. Oil flows through the strait are estimated to range from 6 million barrels per day (b/d) to 10 million b/d, leading to starkly different market expectations and possible volatility in pricing environments.
Rishi Nyati, Managing Director of Emarat Maritime, noted that many vessels transiting through the southern Omani corridor have gone “completely dark,” with vessel names obscured. Nyati conservatively estimated the volume of oil passing through the Strait could reach upwards of 10 million b/d, supplemented by additional transportation via regional pipelines.

Security Measures and Market Implications
In light of heightened security risks, certain tankers have taken drastic measures, including the installation of drone cages around vessel bridges and electronic jamming equipment. Furthermore, crews may be relocated to designated safe rooms based on the vessel’s travel direction. Notably, the tanker New Andros, which was carrying Iraqi fuel oil, remained outside the Strait following a recent attack in the Gulf, highlighting the persistence of security threats.
Despite these disruptions, shipping continues to facilitate oil transport from producing to consuming markets, preventing severe shortages and alleviating fears of exorbitant oil prices that some market participants previously forecasted. Nyati noted that shipping dynamics had remained resilient, alleviating concerns over a recessionary shock.
Freight rates have seen an upward trend mainly due to limited vessel availability, rather than an uptick in underlying cargo demand. According to Rahul Kapoor, Vice President and Global Head of Shipping and Metals at S&P Global Energy, the rise in freight tariffs is primarily attributed to a decrease in vessel supply.
As the freight market adjusts to these operational complexities, the east-west fuel oil arbitrage recently widened significantly, from approximately $70 per metric ton (mt) to $90 mt in a matter of days. Indicative freight rates for Suezmax voyages from Rotterdam to Singapore escalated from around $9.5 million in August to between $10.5 million and $11 million.
Behind the Headline
The ongoing AIS blackouts and enhanced security protocols in the Strait of Hormuz signify a critical juncture for maritime operators in the region. With the challenge of obscured vessel identities, market players must adjust to an unpredictable operational landscape that complicates cargo logistics and pricing models. The evolving security situation indicates that operators may need to rethink their routing strategies and consider alternative transit options. Looking ahead, market participants should closely monitor developments in shipping activity as the potential for volatility remains high, particularly if geopolitical tensions escalate or if the security environment remains unstable.


