Ship-tracking data showed six empty Saudi-flagged supertankers changed course in the Gulf of Aden and were sailing in formation towards southern Africa, with one listing Gibraltar as its destination

Empty VLCCs ballasting in formation toward the Cape of Good Hope is a pattern that has recurred in two distinct circumstances, and the distinction matters for how it reads. The first is Red Sea avoidance, where laden and ballast traffic has at times diverted around southern Africa to skip the Bab el-Mandeb, adding weeks to voyage times and tightening effective tonnage supply, which has historically shown up first in tanker freight rates and insurance premia before feeding into delivered crude differentials. The second is routine repositioning, where empty Saudi-flagged tonnage sails west to load in the Atlantic basin when Saudi barrels are being placed into Europe or the Americas rather than Asia, a signal about export geography rather than security. The Gibraltar destination on one hull leans toward the latter, but convoy-style formation sailing in the Gulf of Aden has previously been associated with heightened security caution in that chokepoint. The tells are whether freight rates on the affected routes move, whether other owners' tracking data show the same diversion pattern, and whether any official security advisory or Saudi export allocation data corroborates one reading over the other. Tanker tracking of this kind has a history of being over-read; formation and destination listings can reflect mundane scheduling as readily as disruption.