US and Royal Navy Sink Decommissioned Warship Off Scottish Coast in Major Live-Fire Exercise

A decommissioned United States Navy warship has been sent to the bottom of the North Atlantic during a major multinational live-fire training exercise conducted off the west coast of Scotland, in an operation that showcased advanced anti-ship weaponry from both American and British forces.

The vessel, USS Klakring, was struck by missiles and a torpedo before sinking approximately 170 miles (274 kilometres) west of the Outer Hebrides last Monday. The sinking formed part of Exercise Atlantic Thunder 2026, a joint training event involving the US Navy and the UK's Royal Navy.

The exercise saw the former guided missile frigate targeted by a missile launched from USS Paul Ignatius and a torpedo fired by USS Massachusetts. Both American warships took part in the coordinated strike that ultimately sent the 43-year-old vessel beneath the waves in the Ministry of Defence's Hebrides range.

The Royal Navy also used the exercise to test what have been described as "ship-busting" weapons against a realistic target. HMS Portland, a Type 23 frigate, fired a Naval Sea Missile (NSM), an advanced sea-skimming weapon capable of travelling at close to supersonic speeds and striking targets more than 100 miles away.

In addition to the frigate's missile launch, the ship's embarked Wildcat helicopter fired Sea Venom missiles at USS Klakring. According to the Royal Navy, this marked the first time these weapons had been live-fired from a Wildcat helicopter against a realistic target, representing a significant milestone in the integration of the system into frontline service.

The sinking of USS Klakring was carried out under tightly controlled environmental conditions. The US Navy stated that the vessel underwent a rigorous cleaning process before the exercise commenced, with contaminants and obsolete equipment removed to minimise the environmental impact of the sinking. Personnel also conducted checks for the presence of whales and dolphins in the area before live firing began.

A US Navy spokesperson explained that sinking exercises of this nature are prepared in strict compliance with environmental regulations. They noted that placing the hulk through an extensive cleaning process ensures that the environmental consequences remain minimal, while providing a practical method for conducting large-scale training of the type required by modern armed forces.

The practice of deliberately sinking decommissioned naval vessels is a long-established tradition within the US Navy, serving the dual purpose of providing realistic targets for training and creating artificial reefs that can support marine life. Other warships, including an aircraft carrier in 2006, have been sunk at sea by the US as part of similar training exercises.

USS Klakring itself had a distinguished service history, having entered service in 1983 before being decommissioned in 2013 after three decades of operations. The ship was named in honour of Rear Admiral Thomas B. Klakring, who was awarded three US Navy Crosses for his service as commander of a submarine during the Second World War.

The exercise underscores the continuing importance of live-fire training in maintaining the readiness of allied naval forces. Such drills allow crews to test weapon systems under realistic conditions that cannot be replicated in simulation, while also strengthening interoperability between the US Navy and the Royal Navy.

The participation of HMS Portland highlights the Royal Navy's ongoing efforts to modernise its anti-ship capabilities. The Naval Sea Missile system represents a significant upgrade in the fleet's ability to engage surface targets at extended range, while the Sea Venom missile provides a flexible airborne strike option for helicopters operating from frigates and other vessels.

Exercise Atlantic Thunder 2026 follows a pattern of regular joint exercises conducted in the waters around Scotland, where the Ministry of Defence maintains extensive training ranges. These facilities allow allied forces to conduct complex, multi-domain operations in a controlled environment with access to deep water and airspace.

The successful sinking of USS Klakring is likely to be studied by military planners as an example of integrated strike operations involving multiple platforms, including surface ships and helicopters. The combination of missiles and torpedoes employed during the exercise demonstrates the layered approach that modern navies use to ensure target destruction even against well-defended vessels.

For the crews involved, the exercise provided invaluable experience in tracking, targeting, and engaging a large surface contact in a live environment. Such training is considered essential for maintaining the high level of proficiency required by armed forces operating in an increasingly complex maritime security environment.

The environmental protocols observed during the exercise reflect the growing emphasis on balancing military readiness with ecological responsibility. The pre-sinking surveys for marine mammals and the removal of hazardous materials from the vessel are now standard practice in sinking exercises conducted by Western navies.

The Ministry of Defence's Hebrides range, where the sinking took place, is one of the most important training areas in the United Kingdom, offering access to deep Atlantic waters and sparsely populated surrounding areas. It regularly hosts exercises involving allied nations, contributing to the interoperability that underpins organisations such as NATO.

The deliberate sinking of USS Klakring brings an end to the vessel's physical existence, but its final act as a target will contribute to the training of sailors and aviators from two of the world's most capable navies. The data and experience gathered during Exercise Atlantic Thunder 2026 will inform future tactics, techniques, and procedures for anti-surface warfare.

As the wreck settles on the seabed, it will gradually become part of the marine environment, potentially serving as an artificial reef for years to come, continuing a tradition that transforms obsolete warships into enduring assets for both military preparedness and marine ecosystems.