British Commando Forces Rehearse Covert Arctic Insertion from German Type 212A Submarine in NATO Drill.

Royal British Marines used the German Navy submarine U-35 to insert a covert team into northern Norway during Exercise Cold Response 26, then reconnoitred a simulated enemy radar site and called in allied naval gunfire. The drill matters because it shows how NATO is sharpening low-signature coastal reconnaissance and targeting on its northern flank.

The Royal British Navy reported that the force surfaced about 200 miles inside the Arctic Circle aboard the German Type 212A boat before departing by Inflatable Raiding Craft under cover of darkness. The mission involved the Surveillance and Reconnaissance Squadron, Shore Reconnaissance Troop, and 148 Commando Forward Observation Battery, a mix built to move ahead of the main force, confirm targets, and feed naval fires against coastal threats. Cold Response 26 runs in Norway from March 9 to March 19 and brings together about 25,000 troops from 14 allied nations.

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Royal British Marines used Germany’s U-35 submarine during Exercise Cold Response 26 in Norway to rehearse a covert Arctic insertion that linked shoreline reconnaissance with allied naval fire support (Picture Source: British Navy)

What happened in Norway was not simply a cold-weather training vignette. According to the Royal Navy, specialist Royal Marines travelled aboard U-35, a German Type 212A submarine, before leaving the boat by Inflatable Raiding Craft under cover of darkness to establish a concealed observation position ashore. From there, they were tasked with monitoring a simulated enemy radar site and helping cue naval gunfire from allied warships. The units publicly identified in the mission were the Surveillance and Reconnaissance Squadron, Shore Reconnaissance Troop, and 148 Commando Forward Observation Battery, a combination that immediately signals a reconnaissance-to-fires mission rather than a symbolic insertion drill.

The tactical importance of that profile is significant. A submarine-launched reconnaissance team gives NATO a way to approach a defended coastline with far less warning than a helicopter insertion or a surface approach would generate, particularly in the narrow fjords and broken terrain of northern Norway. In an Arctic battlespace shaped by poor weather, long distances, sparse infrastructure, and the constant risk of surveillance, the value of getting observers ashore quietly is not abstract. It means allied forces can build a targeting picture before larger formations expose themselves, and it gives commanders a means to identify threats, track movement, and open a strike window without prematurely revealing intent.

That is why the presence of 148 Battery matters so much in this story. This was not only about reconnaissance in the narrow sense of gathering information; it was about closing a kill chain. The operation linked covert insertion, concealed observation, target confirmation, and naval fire support in one sequence. In a confrontation on NATO’s northern flank, the side able to detect first and pass target-quality data fast enough to maritime shooters will hold a major advantage. The Royal Navy’s description of the mission, and the additional detail circulated by military observers online, suggest that this exercise was effectively a rehearsal for shaping the coastal battlespace before follow-on action by allied naval forces.

The use of a German submarine is equally revealing. On one level, U-35 was an appropriate platform for this task. The Type 212A is designed for discreet operations in demanding littoral waters, and its low-signature profile makes it well suited to inserting small teams close to shore. On another level, the Anglo-German pairing says something broader about NATO’s evolution. Interoperability is no longer just about shared communications standards or multinational headquarters; it increasingly means one ally’s high-value platform serving as the tactical enabler for another ally’s raiding force. That is a more mature and more operationally serious form of alliance integration than many Cold War-era comparisons would suggest.

There is also a harder institutional question beneath the surface. The public visibility of a German boat supporting a British commando mission inevitably invites scrutiny over British submarine availability, a point raised in outside reporting around the exercise. Even if the use of U-35 was driven above all by training opportunity and alliance cooperation, it still underlines the practical reality that NATO planners may need to treat allied undersea assets as interchangeable enablers in the High North. For Britain, that is both a strength and a warning: a strength because allied integration is clearly functioning, and a warning because the credibility of maritime special operations ultimately depends on dependable access to undersea delivery platforms.

Strategically, the exercise fits a larger pattern. The Royal Navy said Cold Response 26 involved 14 nations and more than 25,000 troops, underscoring how seriously NATO is now treating the defense of its northern flank. The Arctic and sub-Arctic are no longer peripheral theaters. They sit close to the maritime approaches that connect the North Atlantic to northern Europe, and they border the wider zone through which Russia monitors, defends, and potentially projects power from its northern bases. In that context, submarine-delivered reconnaissance teams are not exotic specialists at the margins of the fight. They are among the few tools able to move ahead of the main force, survive in a harsh environment, and generate the kind of precise intelligence that maritime commanders would need in the early stages of a crisis.

This is also a revealing snapshot of the Royal Marines’ own transformation. For several years, the UK Commando Force has been shifting away from a heavier, more conventional posture toward smaller raiding formations built for littoral maneuver, forward observation, and persistent disruption. The language used by Commando-focused military accounts on X about “the silent approach” in the High North aligns with that trajectory, even if such posts are not official doctrine. What matters is that the training profile matches the concept: discreet insertion, austere operations, concealed surveillance, and the ability to shape events before the main allied force enters the fight. In practical terms, it is the kind of mission set that gives meaning to the Royal Marines’ modernization rhetoric.

The deeper significance of this Arctic mission lies in what it signals rather than in the drama of the images alone. Royal Marines emerging from a German submarine in a Norwegian fjord is a compelling visual, but the real message is that NATO is rehearsing how to infiltrate, observe, and direct fire along a coastline that would matter immediately in any northern contingency involving Russia. The operation suggests an alliance thinking less in terms of static deterrence and more in terms of agile denial: small teams inserted quietly, allied platforms used interchangeably, and maritime fires prepared before an adversary has a clear picture of what is unfolding. That is a serious operational message, and one that will not go unnoticed in Moscow.

Written by Teoman S. Nicanci – Defense Analyst, Army Recognition Group

Teoman S. Nicanci holds degrees in Political Science, Comparative and International Politics, and International Relations and Diplomacy from leading Belgian universities, with research focused on Russian strategic behavior, defense technology, and modern warfare. He is a defense analyst at Army Recognition, specializing in the global defense industry, military armament, and emerging defense technologies.