In the 1990s, after the collapse of the Soviet Union, many Western experts began to fear that Russian scientists and military technology would end arriving in North Korea through opaque means, silently fueling Pyongyang’s weapons programs. Since then, every strange move between Moscow and the North Korean regime has been observed with a mixture of concern, secrecy and suspicions that are difficult to prove.
A collapse full of unknowns. counted this morning CNN in an extensive report that the sinking of the Russian freighter Ursa Major off the Spanish coast has ended up becoming one of the strangest and most opaque stories to emerge around the Ukrainian war, as well as one of the most delicate. Officiallythe ship suffered several explosions in December 2024 before sinking in the Mediterranean.
However, from the first moment they began to accumulate details difficult to fit into the version of a simple maritime accident: a cargo absurdly described as “manhole covers”, a Russian military escort for much of the journey, strange maneuvers before the sinking, subsequent explosions on the wreck and a very unusual silence from both Moscow and the Spanish authorities. Little by little, the case began to look less like a conventional shipwreck and more a strategic operation that went wrong in the middle of an extremely sensitive geopolitical context.
The suspicion that changes everything. The great suspicion arose when Spanish researchers and sources cited by CNN They began to point out that the Ursa Major could transport nuclear reactor components similar to those used in Russian submarines. The captain himself would have ended up admitting to Spanish investigators that those supposed “manhole covers” were actually linked pieces to two naval reactors, although he claimed not to know if they contained nuclear fuel.
The most disturbing hypothesis is that the final destination was not Vladivostok, despite officially appearing on the route, but the North Korean port of Rason. That is where the story takes on a completely different dimension, because the sinking would no longer be just a maritime incident, but the possible interruption of a technology transfer extremely sensitive between Moscow and Pyongyang, just after North Korea sent thousands of soldiers to support Russia in the Ukrainian war.
The WC-135 off Spain. The arrival of the WC-135 aircraft Americans was the detail that definitively set off all the alarms. These planes, known as “nuke sniffers,” are not just any aircraft: they are extremely specialized platforms designed to detect radioactive traces and analyze nuclear contamination in the atmosphere. Washington normally uses them to monitor nuclear tests, atomic accidents or sensitive activity in places like the Russian Arctic or Iran, in any case, not to routinely fly over the Mediterranean off Spain.
that the United States will send twice These devices over the area where the Ursa Major rests immediately fueled the suspicion that he feared something much more serious than a simple shipwreck. Although there is no public confirmation of radioactive contamination, the simple deployment of these planes left a sensation that is very difficult to ignore: Russia could have had a nuclear “gift” destined for North Korea sunk in front of Europe. Let us remember that a few months later, Kim Yong Un showed the world his alleged nuclear submarine.
Explosions, spy ships and an uncomfortable wreck. The sequence after the sinking made the story even stranger. According to the research quoted by CNNthe ship did not seem doomed to sink immediately after the first explosions. However, hours after Spanish rescue resources arrived, the Russian ship Ivan Gren It launched red flares over the area and new explosions were recorded, detected even by Spanish seismic systems.
Days later it also appeared the Yantarofficially a Russian research ship but designated for years by NATO as spy platform submarine. He remained on the wreck for several days before to register more explosions underwater. All of this continued to fuel the theory that Moscow may have attempted to destroy sensitive evidence at the bottom of the Mediterranean, especially if the ship was carrying advanced military nuclear technology or compromised documentation related to North Korea.
The theory of silent sabotage. Another of the most surprising aspects of the investigation is the possibility that the Ursa Major was attacked with an extremely unusual weapon. The Spanish authorities are handling the hypothesis of a small hole just 50 centimeters caused by a supercavitating torpedo Barracuda typea weapon capable of moving at very high speed by reducing the friction of water using a gas bubble.
The disturbing thing about this type of torpedoes is that they can pierce a hull without necessarily generating a large audible explosion, something that would fit with the account of the Russian captain, who stated not having heard no impact as the ship began to lose speed. Other experts believe the use of limpet mines or attached charges to the helmet. In any case, the mere fact that sophisticated sabotage is contemplated in waters near Spain reveals to what extent the case has stopped looking like a conventional accident.
The reflection of a new alliance. Beyond the concrete mystery of the Ursa Majorthe case reflects something even more important: the rapid rapprochement between Russia and North Korea. For years, Moscow avoided crossing certain lines related to the transfer of strategic military technology to Pyongyang. However, the war in Ukraine has changed many priorities.
As we have been countingNorth Korea contributes ammunition, missiles and soldiers, and Russia could be returning the favor with technical knowledge much more sensitive. The images released months later of the sinking with Kim Jong Un showing the helmet of a supposed North Korean nuclear submarine fit closely with this possibility. If there really was an attempt to move Russian naval reactors to North Korea, the sinking of the Ursa Major could represent one of the most important (and most secret) episodes of the new military relationship between both countries.
Whatever it is is still in the Mediterranean. To this day, the wreck remains at about 2,500 meters deep off the Spanish coast and many questions remain unanswered. The Spanish authorities have avoided give too many details and maintain that recovering the black box would be extremely complex. Meanwhile, the contradictions, the official silence and military activity around the site of the sinking have fueled all kinds of suspicions.
The only thing that is clear is that the case long ago ceased to be the story of a Russian cargo ship sunk in the Mediterranean without further ado. Now it has become a very plot movie maker that mixes hybrid warfare, sabotage, underwater espionage, nuclear technology and the possibility that, in the midst of the chaos of the Ukrainian war, Russia was helping North Korea make one of the technological leaps more delicate of its military history.
Image | Bas Urrutia
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