Tanker operators are once again disabling vessel tracking systems as they navigate the Strait of Hormuz, a critical chokepoint for global energy supplies. According to Bloomberg News and preliminary data from shipping analytics firm Kpler, tanker traffic through the waterway plummeted on Sunday to just six vessels, all operating in what industry observers term "dark mode"—a practice in which ships turn off their automatic identification systems to avoid detection.
The resurgence of unobserved transits reflects mounting anxiety in the shipping industry following a series of Iranian attacks on commercial vessels transiting the region. Operators are balancing the risks of traversing one of the world's most strategically important shipping lanes against the decision to proceed without the safety of real-time position tracking. The practice has become increasingly common during periods of elevated geopolitical tension in the Persian Gulf.
The renewed reliance on dark-mode operations underscores how regional escalation directly disrupts global energy markets and maritime commerce. As a critical transit point through which roughly one-third of seaborne oil passes, any sustained reduction in Strait of Hormuz traffic threatens to increase shipping costs and potentially tighten crude supplies worldwide.