Saudi Tankers Run Dark Through Bab el-Mandeb as Houthi Embargo Holds
Vessel data shows Saudi crude carriers disabling AIS transponders at Bab el-Mandeb, testing whether Houthi forces can track and intercept ships running without transponders.
Saudi crude tankers that loaded at Yanbu have resumed transiting Bab el-Mandeb with AIS transponders switched off, vessel-tracking data published Monday (2026-08-03) showed, a sign that some shipowners are probing the chokepoint even as the Houthi blockade of Saudi exports through the strait shows no sign of lifting.8
The shift from outright avoidance to dark-mode running followed a near-total shutdown of traffic. Only 11 tankers carrying commodities transited Bab el-Mandeb on Sunday (2026-07-26), a multi-month low, OilPrice.com reported, after Yemen's Iran-backed Houthi rebels announced a maritime embargo on Saudi crude passing through the waterway. Ships had been turning away from the strait's southern end from the moment the blockade was declared.7,4
Saudi Arabia's Red Sea export volumes explain the stakes. In the week to July 17 (2026-07-17), the kingdom was shipping 5.9 million barrels a day from its two terminals at Yanbu, a record pace, tanker tracking data cited by Rigzone showed. The blockade announcement arrived days later.4
Rerouting decisions followed immediately. On July 21 (2026-07-21), a Greek-owned Suezmax, the Amazon, which had departed Yanbu loaded with more than 1 million barrels of crude, switched its destination to the Suez Canal mid-voyage, Rigzone reported. By late July, two Asian oil refiners were in active discussions with Saudi Aramco about redirecting cargoes around the Cape of Good Hope, OilPrice.com reported on July 27 (2026-07-27). That route adds weeks to voyage times and substantially higher freight costs.4,6
The SUMED pipeline offers partial relief. Running from Ain Sokhna on the Red Sea to Sidi Kerir on the Mediterranean, it can handle roughly 2.5 million barrels per day at full capacity — well short of what Saudi Arabia was exporting from Yanbu alone in mid-July.6
Dark-mode transits are the blunter workaround. Two tankers that had loaded at Saudi terminals appeared to have made the Bab el-Mandeb transit with transponders disabled, OilPrice.com said Monday (2026-08-03). Disabling AIS makes vessels invisible to commercial tracking networks and, in theory, harder for Houthi targeting systems to identify. It also removes the vessel from maritime rescue visibility — a trade-off shipowners are evidently willing to accept.8
ICE Brent crude front-month stood at $81.45 per barrel on Tuesday (2026-08-04), a significant retreat from the $98-plus level OilPrice.com reported in late July (2026-07-27), when prices had climbed more than 33% in a single month as the blockade threat materialized. The supply disruption narrative has grown more complicated since those highs, not simpler, yet the futures market is pricing crude considerably lower. The source material does not account for the drawdown, and demand-side dynamics may be overriding the supply signal in the front-month contract.6
LNG flows had been severed before the current standoff. No LNG tankers had transited Bab el-Mandeb since an alleged attack on a Russian vessel in the Mediterranean deterred shipments via the route, Montel vessel-tracking data showed in May (2026-05-19). A blockade was unlikely to significantly disrupt LNG supply to Europe, Montel said on July 22 (2026-07-22), because most carriers were already avoiding the chokepoint before the Houthi embargo declaration.1,3
The threat has not stayed confined to the Red Sea. The Kaifan, an oil products tanker, was attacked in the Strait of Hormuz as hostilities widened to the Persian Gulf's exit route, Rigzone reported on July 21 (2026-07-21).2
"The Bab el-Mandeb risk picture is deteriorating," a MarineTraffic analyst said on Wednesday (2026-07-22). Dark transits suggest at least some shipowners believe the strait remains passable under cover of AIS silence. Whether Houthi forces can detect and interdict vessels running without transponders — and at what rate — is the operational question that will settle the economics of the Cape of Good Hope detour for Saudi crude heading to Asia.5,8