Lately headlines have been filled with developments of the United States targeting Venezuelan-linked tankers, or sanctioning Russia's so-called Shadow Fleet, or else intercepts of Iranian oil shipments on the high seas. Such country names on the receiving end of Washington's punitive measures have become commonplace, but it is surprising to see the EU country of Spain pop up as potentially next on the target list. Sanctions on Spanish-flagged vessels?

The US is actually mulling it, based on Madrid having blocked vessels carrying weapons bound for Israel since last year, even including refusals for American ships to dock.

Source: Bloomberg

Maritime monitoring source Freight Waves reported of several incidents last year, "Spain refused docking privileges at APM terminals in Algeciras, Spain in November 2024 to three U.S. flagged vessels operating under the MSP: Maersk Denver, Maersk Nysted, and Maersk Seletar."

The Federal Maritime Commission conducted a formal investigation and this month confirmed the anti-US and anti-Israel actions by the Spanish government did take place, in line with Spain's recent boycotting of Israel (specifically arms and military equipment) policy due to the Gaza war.

Spain has made clear it has recently codified a "multi-faceted policy" to ban ships and aircraft carrying weapons headed for Israel or tankers carrying fuel for use by the Israeli military from using Spanish ports or even flying in its airspace.

The US Federal Maritime Commission within the last days issued a statement confirming that it is considering "remedies the commission can implement to adjust or meet unfavorable conditions to shipping in the foreign trade of the United States include adopting regulations restricting voyages to or from US ports, imposing per voyage fees, limiting amounts or types of cargo, or taking ‘any other action the commission finds necessary and appropriate to adjust or meet any condition unfavorable to shipping the foreign trade of the United States’."

There has long existed routine coordination between Spanish and American military officials, however, the relationship is becoming increasingly tense, given port blockage issue reflects a serious political divergence amid the ongoing war in Gaza.

The Rota base, near Cádiz on the Atlantic coast, is under Spanish control but heavily utilized by American forces. Also, the Morón air base, which is near Seville, is a key hub for US military operations, with American forces long operating with a broad degree of freedom there.

US naval base at Rota in Cadiz province, file image

Madrid has defended its decision as rooted in Spain's sovereignty and terms outlined in a 1988 bilateral defense agreement, amid the past couple years of European scrutiny of Israeli military action against Palestinians, especially in war-ravaged Gaza.

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