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In this file photo, the chemical\/oil tanker Ocean Mariner, sailing under the flag of Liberia, arrives at the Port of Havana on Jan. 9, 2026.<\/p>\n
YAMIL LAGE<\/p>\n
AFP via Getty Images<\/p>\n
The fate of two oil tankers believed to be carrying desperately needed fuel to Cuba is emerging as a key test of Washington\u2019s escalating pressure campaign \u2014 and of Havana\u2019s ability to withstand it.<\/p>\n
At the center of the uncertainty is the Sea Horse, a Hong Kong-flagged tanker whose unusual movements have raised questions about whether it already delivered fuel to the island in secret or is still attempting to do so under growing scrutiny.<\/p>\n
The vessel, carrying an estimated 190,000 to 200,000 barrels of Russian diesel, spent nearly three weeks broadcasting that it was \u201cnot under command\u201d while drifting in the Sargasso Sea, about 1,300 nautical miles from Cuba. Maritime tracking data, however, suggests the behavior may have been deceptive.<\/p>\n
Analysts say the tanker likely engaged in \u201cspoofing\u201d \u2014 manipulating its tracking signal \u2014 and may have sailed to Cuba undetected earlier this month before reappearing far out at sea. It had previously switched off its transponder during a ship-to-ship transfer of Russian fuel near Cyprus, a tactic commonly linked to sanctions evasion.<\/p>\n
\u201cThe Sea Horse is no longer drifting and is now moving under its own power at about 9.9 knots,\u201d said Jorge Pi\u00f1\u00f3n, an energy expert at the University of Texas at Austin. \u201cOur calculations show it could reach Cuba\u2019s north coast in about five days.\u201d<\/p>\n
A second tanker, the Anatoly Kolodkin, which is under U.S. sanctions, is believed to be carrying about 700,000 barrels of Russian crude and is also heading toward the Caribbean.<\/p>\n
Whether either vessel ultimately reaches Cuba remains unclear.<\/p>\n
At least two U.S. Coast Guard cutters are positioned off Cuba\u2019s northeastern coast, between Moa and Puerto Padre, according to Pi\u00f1\u00f3n, placing them in position to intercept ships if ordered. Their presence underscores what has effectively become a U.S. maritime blockade on fuel shipments to the island.<\/p>\n
\u201cThe United States has issued a directive to prevent oil from entering Cuba,\u201d Pi\u00f1\u00f3n said. \u201cAnd those assets are there in case they need to act.\u201d<\/p>\n
But some analysts question whether the Sea Horse is even attempting to reach Cuba.<\/p>\n
\u201cThe idea that a tanker could sneak into Cuba right now just doesn\u2019t make sense,\u201d said Evan Ellis, a professor at the U.S. Army War College. \u201cThat\u2019s probably the most monitored patch of the Caribbean.\u201d<\/p>\n
Ellis pointed to the large scale of U.S. military deployment in the region \u2014 including surveillance aircraft, destroyers and Marine units tasked with intercepting sanctions-violating vessels \u2014 even after the aircraft carrier USS Gerald Ford and its accompanying warships, which had been sent to the Caribbean late last year, are now in the Middle East.<\/p>\n
\u201cYou just can\u2019t sneak a tanker into Cuba without somebody noticing,\u201d he said.<\/p>\n
Instead, Ellis said the vessel\u2019s conduct may point to other explanations, including mechanical failure. Many ships involved in sanctions evasion are part of the so-called \u201cshadow fleet,\u201d and are often aging tankers operating with limited oversight.<\/p>\n
\u201cThey\u2019re usually way past their service life and only marginally seaworthy,\u201d he said. \u201cIt\u2019s entirely possible this is some kind of real emergency.\u201d<\/p>\n
The ship\u2019s current position \u2014 still hundreds of miles from Cuba \u2014 further clouds assumptions about its destination.<\/p>\n
\u201cIt doesn\u2019t even necessarily suggest they\u2019re heading for Cuba,\u201d Ellis said. \u201cIt just sounds like something unusual is going on.\u201d<\/p>\n
The uncertainty is compounded by confusion over U.S. sanctions policy.<\/p>\n
Pi\u00f1\u00f3n said the Trump administration recently eased certain restrictions on Russian oil shipments to countries such as India, China, Japan and South Korea amid disruptions caused by the closure of the Strait of Hormuz after the U.S. and Israel attacked Iran. But it remains unclear whether that flexibility extends to Cuba.<\/p>\n
\u201cWe haven\u2019t seen the directive \u2014 whether it\u2019s an executive order or something else \u2014 that clarifies whether Cuba is included,\u201d he said. \u201cThat\u2019s the question we all have.\u201d<\/p>\n
At the same time, Ellis noted that U.S. officials have discussed allowing limited oil shipments from Venezuela under tightly controlled conditions \u2014 with cargoes delivered to private companies rather than the Cuban government \u2014 in an effort to ease humanitarian pressures without benefiting governments in Caracas or Havana.<\/p>\n
The stakes for the island are high.<\/p>\n
Diesel has become the most critical fuel in Cuba\u2019s economy, powering transportation, electricity generation, agriculture and water systems.<\/p>\n
\u201cDiesel is essential,\u201d Pi\u00f1\u00f3n said. \u201cIt moves food, runs generators, pumps water. Right now, there is aid sitting in ports that can\u2019t be distributed because there\u2019s no diesel for trucks.\u201d<\/p>\n
If the Sea Horse\u2019s cargo arrives, it could be used almost immediately. Crude from the Anatoly Kolodkin, however, would take weeks to refine \u2014 and Cuba\u2019s aging facilities produce limited amounts of diesel.<\/p>\n
The developments come as Cuba faces one of its worst energy crises in decades.<\/p>\n
A nationwide blackout on March 16 underscored the severity of the situation after fuel imports largely dried up. Venezuela \u2014 long the island\u2019s main supplier \u2014 halted shipments following the Jan. 3 capture of Nicol\u00e1s Maduro and the subsequent U.S. control over the Venezuelan oil company PDVSA. Mexico\u2019s last delivery of oil to Cuba was also in early January.<\/p>\n
In recent days, Cubans have taken to the streets for 11 consecutive nights, banging pots and pans in protests during blackouts.<\/p>\n
Against that backdrop, the question of whether the tankers will reach Cuban shores remains unresolved \u2014 and increasingly complex.<\/p>\n
For Washington, the decision carries significant risks. Blocking the shipments could escalate tensions with both Cuba and Russia. But allowing them through could weaken a strategy aimed at cutting off fuel supplies to force political change.<\/p>\n
For ordinary Cubans, the stakes are more immediate: Whether the ships dock or turn away could determine how long the lights stay on.<\/p>\n
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