Red Sea hostilities are forcing widespread maritime diversions around the Cape of Good Hope, and bunker supplier Peninsula is warning of a “perfect storm” for global tanker operators as surging tonne-mile demand collides with stringent Mediterranean emissions regulations.

With the Bab el-Mandeb Strait increasingly bypassed, vessels that would normally exit the Red Sea eastbound are instead transiting north via the Suez Canal and navigating westbound through the Mediterranean as part of longer rerouted voyages. According to Peninsula, this detour could more than double normal tonne-mile demand versus a Bab el-Mandeb eastbound exit. For a typical Suezmax tanker — the largest class of vessel able to transit the Suez Canal fully laden — the diversion is said to require around 1,500 tonnes of additional fuel, at a cost of approximately $800,000 and an emissions footprint of roughly 3,800 tonnes of CO₂.

Spot rates for Suezmax vessels are already rising, Peninsula noted, triggering a scramble to cover cargoes ahead of the full tonne-mile effect taking hold.

Kenny MacLean, Chief Operations Officer at Peninsula, stated: “The industry could be dealing with a sudden, significant increase in fuel consumption. This is more complex than simply plotting a longer course — it will require a fundamental recalibration of voyage economics that will squeeze global bunker supply at a time when demand already outstrips supply.”

Beyond raw fuel costs, Peninsula is highlighting what it describes as a regulatory blind spot for rerouted vessels: the Mediterranean Emission Control Area (Med ECA). Under Med ECA rules, vessels transiting the Mediterranean must burn fuel with a maximum sulphur content of 0.1%, rendering standard very-low-sulphur fuel oil (VLSFO) non-compliant. Operators must instead switch to marine gas oil (MGO) or suitable biofuels before entering the region.

Peninsula notes that European authorities are increasingly deploying so-called “sniffer drones” to remotely analyse vessel emissions in real time, meaning operators who fail to secure compliant fuel risk fines and vessel detentions.

The shift in maritime traffic routes is expected, according to Peninsula, to redraw the global bunkering map, with significantly increased demand anticipated at alternative supply ports along the revised route. These include Port Said, Malta, Gibraltar, Algeciras, Las Palmas, Algoa Bay and Port Louis.

Richard Alvarez, Global Head of Sales at Peninsula, commented: “Operators are navigating a regulatory and logistical minefield. Securing compliant fuel conveniently, in the right location, in a rising price environment is now the defining challenge of these deviated voyages.

“As supply tightens at alternative bunker hubs, the ability to rely on suppliers with a globally integrated supply network and deep access to multi-product cargoes will prove critical to minimise disruption and avoid the costs of non-compliance.”