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Exercise Atlantic Thunder 2026
Ships, aircraft, and a submarine from the US and UK were involved in Exercise Atlantic Thunder 2026, a multi-domain sinking exercise (SINKEX) led by US 6th Fleet, in the North Atlantic, Sep. 25, 2026.
According to a US Navy news release, during the SINKEX, participating forces assigned to U.S. Commander, Task Force 65, US Commander, Task Force 67, US Commander, Task Force 68, US Commander, Task Force 69 and US Commander, Task Force 1060 alongside the UK Royal Navy and the US Air Force sank the decommissioned guided-missile frigate ex-USS Klakring. The event developed combined proficiency in tactics, targeting, and live-firing against a surface target at sea.
“Atlantic Thunder demonstrates the unmatched lethality and interoperability of the United States and United Kingdom,” said US Capt. Kelechi Ndukwe, Commander, U.S. Task Force 65. “This sinking exercise not only validated the power behind U.S.-UK offensive weapons but delivers a clear message to adversaries that the U.S. Navy and Royal Navy remain a ready allied force.”
The exercise strengthens the US-UK alliance, warfighting credibility, and interoperability during long-range maritime sinking operations. During the SINKEX, the guided-missile destroyer USS Paul Ignatius (DDG 117) successfully demonstrated maximum damage and range capability of an anti-surface variant of the Standard Missile 6 (SM-6). USS Massachusetts (SSN 798) successfully engaged the target with the Mk 48 Advanced Capability Torpedo, resulting in the final hit and ultimately sinking ex-USS Klakring, as the video in this post shows.
US and UK units involved in the exercise
During the exercise, the Royal Navy confirmed its newest ship-busting missiles, the Naval Strike Missile (NSM) and Sea Venom.
“The successful firing of NSM marks a significant milestone for the Royal Navy, demonstrating our ability to deliver credible, modern maritime strike capability,” said Royal Navy Lt. Cmdr. Louise Kirkaldy, HMS Portland’s Principal Warfare.
Prior to the start of the exercise Naval Surface Warfare Center Carderock and Naval Information Warfare Center (NIWC) Pacific used sensors placed on the target ship to perform battle damage assessments. The data gathered will be used in post-exercise damage assessments to provide critical information to rapidly identify system failures, determine repair needs, and strengthen the Navy’s future real-world response.
US and UK units involved in the exercise included Paul Ignatius, USS Massachusetts, Royal Navy frigate HMS Portland (F 79), US Navy and Royal Air Force P-8 maritime patrol aircraft, a Royal Navy Wildcat helicopter, US Air Force F-15E Strike Eagles, and personnel assigned to US Explosive Ordnance Disposal Mobile Unit (EODMU) 8.
USS Klakring
USS Klakring (FFG-42) was a Oliver Hazard Perry class frigate of the United States Navy named for Rear Admiral Thomas B. Klakring (1904–1975), who was awarded three Navy Crosses as commander of the submarine USS Guardfish during World War II.
Klakring was laid down on 19 February 1982 by the Bath Iron Works Corp. Bath, Maine; launched on Sep. 18, 1982, sponsored by Beverly Bohen, niece of Rear Admiral Klakring, and commissioned on Aug. 20, 1983 at Bath.
The USS Klakring was decommissioned on Mar. 22, 2013.
Hulks
Former US Navy vessels used in SINKEXs, referred to as hulks, are prepared in strict compliance with regulations prescribed and enforced by the Environmental Protection Agency under a general permit the Navy holds pursuant to the Marine Protection, Research and Sanctuaries Act.
Prior to being transported, each hulk undergoes a rigorous cleaning process for environmental safety. Aligned with UK Ministry of Defense environmental policy, robust monitoring was conducted above and below the sea’s surface with trained personnel using specialized equipment to reduce the overall risk of inadvertent impact to the marine environment and marine mammals during the Atlantic Thunder 2026 SINKEX.
Photo credit: U.S. Navy and Royal Navy
Video: VIDEO: Former U.S. Frigate Sunk in Exercise with U.S., Royal Navies Dzirhan Mahadzir September 30, 2026 1:27 PM
