A newly built 109-metre superyacht, the O3, owned by billionaire Leonard Blavatnik — a businessman with longstanding ties to the Russian state — has been sailing through Denmark’s strategic straits, raising alarms over potential intelligence-gathering and sabotage operations. Danish media reported that the vessel, fitted with a helicopter pad and deep-water equipment, recently docked in Copenhagen and Aarhus. Analysts warn that such a platform could be used to survey vulnerable points in European communication and energy infrastructure, including cables near the NATO hub of Bornholm.
Vessel equipped for covert operations, experts say
Anders Puck Nielsen, a researcher at the Royal Danish Defence Academy, told local outlets that “ships of this calibre can be used both for espionage and sabotage”. He stressed that the owner’s links to Russia must be taken into account. The O3 carries satellite communication towers and can transport small submersibles, making it an ideal tool for seabed reconnaissance or electronic surveillance of radars and defence systems on Bornholm. The area has been under heightened scrutiny since the Nord Stream pipeline sabotage in 2022, with Baltic energy and data cables now considered high-risk targets.
Blavatnik’s fortune tied to Kremlin deals
Although Blavatnik holds Western citizenship, his multibillion-dollar wealth originated from the 2013 sale of the oil company TNK-BP to the Russian state-owned Rosneft — a deal personally approved by Vladimir Putin. Critics argue that this connection undermines the effectiveness of Western sanctions, allowing assets built on Kremlin-backed fortunes to move freely through sensitive European waters. The O3’s presence in Danish territory has revived calls to close loopholes that permit such vessels to operate under civilian guise while potentially serving Russian hybrid warfare objectives.
Lax monitoring exposes NATO vulnerabilities
Defence observers note that the yacht’s ability to “disappear from radar” or conduct operations near critical infrastructure highlights gaps in maritime surveillance. The Baltic Cable and Bornholm-Sweden interconnectors, both vital for European energy security, lie within easy reach of the vessel’s equipment. The case is seen as a test of whether European governments will shift from passive observation to active interception of suspicious ships. Denmark has not announced any boarding or inspection of the O3 so far.
What it means for British interests
For the United Kingdom, the incident reinforces concerns about the security of North Sea infrastructure and the broader NATO framework. If a Kremlin-linked oligarch’s yacht can operate unchallenged near a key alliance base, similar threats could emerge closer to British shores — for instance, around underwater cables connecting the UK to continental Europe. The situation also raises questions about the robustness of sanctions enforcement: Blavatnik’s assets, though technically Western, are rooted in Russian state corruption. British policymakers may face pressure to demand stricter port state controls and joint naval patrols in the Baltic and North Sea to prevent such vessels from being used as platforms for espionage or sabotage.
Call for tougher legal measures
Several analysts and politicians have urged the EU and NATO to introduce compulsory inspections of suspicious private ships, expand counter-intelligence monitoring in ports, and empower navies to deter hybrid attacks. The O3 case is the most recent example of what experts describe as Russia’s exploitation of liberal maritime law to conduct intelligence operations under the cover of leisure cruising. Without immediate legal action to identify, block and eventually confiscate such assets, Europe’s declaratory counter-intelligence measures will remain insufficient against the growing hybrid threat from Moscow.
