Strait of Gibraltar
Atlantic ↔ Mediterranean · the only sea gateway to the Mediterranean, ~14 km wide at its narrowest — and a hotspot for sanctioned-oil ship-to-ship transfers.
How many ships pass through the Strait of Gibraltar?
On the order of 300 vessels a day — roughly 100,000 a year — one of the busiest shipping lanes in the world, plus dense ferry traffic across the strait between Spain and Morocco.
Why the Strait of Gibraltar matters
It is the only sea gateway to the Mediterranean. Every ship serving southern Europe, North Africa, the Levant, the Black Sea and — via the Suez Canal — Asia must pass through it. That concentration makes it both a critical trade artery and a natural monitoring point for any vessel entering or leaving the Mediterranean basin.
Geography
The strait is about 58 km long and narrows to roughly 14 km (about 8 nautical miles) at its tightest point, between Point Marroquí in Spain and Point Cires in Morocco. Spain and the British territory of Gibraltar sit on the northern shore; Morocco and the Spanish enclave of Ceuta on the southern shore.
Sanctions & dark-fleet context
The waters around the strait — particularly the anchorages off Ceuta — have become a well-documented hub for ship-to-ship (STS) transfers of Russian and other sanctioned crude, where oil is moved between tankers to obscure its origin before it continues to market. The tankers involved routinely disguise beneficial ownership, gap or spoof their AIS, and reflag. Screening any tanker transiting or loitering near Gibraltar against sanctions and PEP lists — with ownership chain, alias history and AIS-gap record — is exactly the check compliance, bunker and insurance teams need.
Frequently asked questions
How many ships pass through the Strait of Gibraltar?
Around 300 vessels a day — roughly 100,000 a year — one of the busiest lanes in the world, plus heavy ferry traffic across the strait.
Why is it important?
It is the only sea gateway to the Mediterranean, so every ship serving southern Europe, North Africa, the Levant, the Black Sea and Asia via Suez must pass through it.
How wide is the Strait of Gibraltar?
About 14 km (~8 nautical miles) at its narrowest, between Point Marroquí (Spain) and Point Cires (Morocco); around 58 km long.
Which countries border it?
Spain and the British territory of Gibraltar on the European shore; Morocco and the Spanish enclave of Ceuta on the African shore.
Why does it matter for sanctions monitoring?
The waters off Ceuta and near the strait are a hub for ship-to-ship transfers of Russian and other sanctioned crude, using tankers that disguise ownership and gap their AIS. Screening any tanker transiting or loitering there against 50+ sanctions lists is core due diligence.
Live chokepoint trackers
Strait Up Maritime runs live vessel maps with a sanctioned-vessel overlay for these chokepoints — every ship transiting, updated every 60 seconds, no login required.