Nearly fifteen per cent of global seaborne trade moves through the Red Sea, and in recent days that corridor has shown signs of seizing up. Ship-tracking data reveals a string of vessels — oil tankers, chemical carriers and vehicle ships — making abrupt U-turns rather than entering the Bab al-Mandab Strait after the Houthis declared a maritime embargo on Saudi ports.
The crude oil tanker Rodos, loaded with Saudi crude, departed the Red Sea port of al-Muajiz for India before turning north roughly nine hours later. The oil and chemical tanker Mica left Jazan and also reversed. The Marshall Islands-flagged vehicle carrier Liu Jiang Kou, sailing from China to Jeddah, changed course entirely in the Gulf of Aden. A Hong Kong-flagged tanker, the New Prime, turned around and now appears to be waiting in the Arabian Sea.
"While the reasons for each course change cannot be independently verified, the timing is consistent with the embargo announcement," maritime risk firm Vanguard noted. The EU naval force Aspides has advised merchant vessels linked to Israeli, US or Saudi interests to avoid the Red Sea and Gulf of Aden until the threat level drops.
The Red Sea became a vital outlet for Gulf oil after the effective closure of the Strait of Hormuz during the US-Israeli war with Iran. Rosemary Kelanic of the Defense Priorities think tank said that diversion "has played a major role in relieving pressure to global markets," and warned that further Houthi restrictions "will push prices up." Any attack in the Red Sea or Gulf of Aden, she added, "will suppress all international traffic, not just Saudi-bound vessels."
For now the picture is one of hesitation rather than halt: ships waiting in open water, rerouted cargoes, and underwriters quietly lifting war-risk premiums. But the margin for error is thin. If the U-turns harden into a standing avoidance of the Bab al-Mandab, the world's manufacturers and fuel buyers will feel it within weeks.
For now, shipping lines are improvising rather than halting. Some operators are adding buffer days to schedules, others are consolidating cargo onto fewer sailings, and a few are quietly negotiating with insurers for war-risk cover that was unthinkable a year ago. The EU naval mission Aspides continues to escort and advise, but its advisory alone cannot restore confidence in a corridor where the attacker answers to no port authority. Until the Houthi embargo is lifted or credibly neutralised, the Red Sea will remain a route of last resort rather than a reliable artery.
Until the Bab al-Mandab reopens to normal traffic, every rerouted tanker is a line item in a global insurance premium that is only going up.
