Portuguese Tridente-class attack submarine NRP Arpão has returned home after a historic 70-day deployment under NATO’s Operation Brilliant Shield.

This mission marked the first time a Portuguese submarine has navigated below Arctic ice, demonstrating Portugal’s growing naval capabilities and commitment to Euro-Atlantic defence, according to a NATO press release.

NRP Arpão, a conventional submarine, conducted surveillance, patrol, and reconnaissance missions, monitoring non-NATO military platforms in the region.

The mission was supported by the Allied navies of Canada, Denmark, and the United States.

Upon returning to Alfeite, Lisbon, Arpão was welcomed by Portuguese Defence Minister Dr Nuno Melo, Chief of the Portuguese Navy Admiral Gouveia e Melo, and Commander of NATO Submarines, Rear Admiral Thomas Wall.

Commander Taveira Pinto, who led the mission, expressed his pride in the submarine’s achievements, stating, “We have successfully achieved our objectives of surveillance and patrol in the North Atlantic, demonstrating the capabilities of this type of conventional submarine in Arctic conditions. Our ability to operate across the entire spectrum of the Atlantic is a testament to our commitment to supporting the operations of the Atlantic Alliance.”

NATO’s submarine fleet plays a critical role in maintaining the Alliance’s strategic and tactical advantage, the press release noted. NATO member states regularly conduct joint exercises and training missions to enhance interoperability and cohesion. Exercises such as Dynamic Mongoose and Dynamic Manta hone submarine capabilities, while Dynamic Monarch focuses on the complex task of locating and rescuing distressed submarines.

The technological sophistication of NATO’s submarines is a key strength. Submarines from the United States, United Kingdom, France, and Germany lead in advanced stealth capabilities, making them nearly undetectable to enemy forces. Many NATO submarines, such as the US Navy’s Virginia Class, France’s Suffren Class, and the Royal Navy’s Astute Class, feature nuclear propulsion, allowing them to operate underwater for extended periods.

In addition to their combat capabilities, NATO’s submarines are essential for strategic deterrence. Submarine-based nuclear deterrence from the United States’ Ohio Class, France’s Le Triomphant Class, and the United Kingdom’s Vanguard Class submarines forms a crucial part of the Alliance’s nuclear triad.

The image above, from the NATO release showing other submarines encountered on the patrol, is not of the same type or nationality of the vessel named above, we have tried to change it and it will be updated when the system refreshes.


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George Allison
George has a degree in Cyber Security from Glasgow Caledonian University and has a keen interest in naval and cyber security matters and has appeared on national radio and television to discuss current events. George is on Twitter at @geoallison

10 COMMENTS

  1. George You may want to ask Santa for a copy of Jane’s 🎅🏻
    That is a photo of a Russian Kilo class submarine.

    That isn’t anything like the Portuguese boat 🥴

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