Saudi Crude Tanker Transits Bab el-Mandeb in Dark Mode Amid Houthi Threats

Key Facts

Amid escalating geopolitical risks in the Red Sea, shipping companies are resorting to stealth tactics to secure global energy supplies. According to reports, the Greek-owned tanker Merbabu, laden with Saudi crude, transited the Bab el-Mandeb Strait in 'dark mode' by disabling its transponders to avoid detection. This move follows an announcement by the Houthis to expand their maritime campaign to include a blockade on Saudi oil shipments passing through the key chokepoint.

This incident highlights the fragility of regional supply chains, as vessel tracking data showed the tanker later re-emerged in the Arabian Sea after reactivating its AIS signal. While some China-bound tankers continue to transit the strait, other vessels, such as the Torm Innovation, have performed U-turns heading toward the Suez Canal. Per market data, increased shipping risks and the use of 'dark mode' for Saudi crude indicate heightened supply chain vulnerability, providing fundamental support for oil prices.

Regarding energy-related economic data, the American Petroleum Institute (API) reported on July 21, 2026, an increase in crude oil stocks by 2.603 million barrels, contrary to forecasts of a drawdown. Traders are closely monitoring how these geopolitical tensions impact supply stability, alongside upcoming global trade balance data which may reflect the rising costs associated with navigating unstable maritime corridors.