U.S. and Partner Nations Sink Retired Warships in RIMPAC 2026

In a dramatic display of operational synergy, the United States and its allied nations recently collaborated to sink two decommissioned warships during live-fire exercises as part of the Rim of the Pacific (RIMPAC) 2026. This year’s exercises, which showcase maritime capabilities, took place in Hawaiian waters, enhancing the military readiness and cooperative tactics among participating nations.

Major Highlights of the SINKEX Operations

The guided missile cruiser USS Mobile Bay (CG-53) was sunk on July 12, followed closely by the USS Peleliu (LHA-5), which met its end on July 17. Both vessels were strategically sent to the ocean floor in waters about 15,000 feet deep, over 50 nautical miles north of the island of Kauai in Hawaii.

The exercises brought together forces from several countries, including Australia, Canada, Italy, Japan, New Zealand, Spain, and the United States. The primary aim was to enhance tactics, targeting, and live-fire coordination against surface threats, enabling partner nations to train jointly in complex maritime operations.

Comments from Military Leadership

U.S. Navy Vice Adm. Jeff Jablon, who commands RIMPAC 2026’s Combined Task Force, expressed pride in witnessing international naval forces work together seamlessly. He emphasized the importance of these relationships:

“Watching our Sailors work side-by-side with partners from around the world… is the strongest reminder of why these relationships matter.”

Rear Adm. Inho Kim of the Republic of Korea Navy echoed this sentiment, highlighting the success of the SINKEX operations as evidence of the coalition’s growing capabilities and commitment to regional stability.

A Multifaceted Approach to Modern Warfare

The live-fire exercise involved a wide range of military platforms and weaponry, showcasing cutting-edge technology and extensive collaboration. Among the military assets deployed were:

• F/A-18 Super Hornets armed with AGM-158C Long Range Anti-Ship Missiles (LRASM)
• HIMARS by the U.S. Army, capable of launching High Mobility Artillery Rocket Systems
• Type 12 Surface-to-Surface Missiles from the Japan Ground Self-Defense Force
• AH-64 Apache helicopters equipped with advanced munitions

In addition to the impressive firepower, the U.S. Defense Department released a video documenting these operations, featuring the sinking of the USS Mobile Bay amidst a coordinated military effort.

The Role of Partner Navies

Various partner navies demonstrated their capabilities during the SINKEX operations, emphasizing the unified strength of the coalition:

• The Royal Australian Navy launched an AGM-114N Hellfire missile from the USS Wayne E. Meyer (DDG-108).
• The Spanish Navy frigate ESPS Álvaro de Bazán (F101) coordinated with the Japan Maritime Self-Defense Force to attack the USS Peleliu using RGM-84 Harpoon missiles.
• The Royal New Zealand Navy deployed its SH-2G(I) helicopter to launch a Penguin anti-ship missile at the USS Peleliu.

Amidst these operations, the Italian Navy conducted similar maneuvers, showcasing their maritime capabilities without disclosing the specific targets.

Environmental Considerations

Affirming their commitment to environmental stewardship, the U.S. Navy implemented strict precautionary measures before conducting the exercises. Safety checks ensured that the area was free from aviation, marine traffic, and wildlife, allowing the live-fire operations to proceed without unwarranted impacts on the environment. The exercises adhered to federal laws, including the National Environmental Policy Act and the Marine Mammal Protection Act.

Historical Context of the Ships

The USS Mobile Bay, a Ticonderoga-class guided missile cruiser, was commissioned in 1987. Over its 36 years of service, it supported numerous operations, including Desert Shield, Desert Storm, and Iraqi Freedom. The vessel was decommissioned in August 2023.

Similarly, the USS Peleliu, a Tarawa-class amphibious assault ship that entered service in 1980, played a vital role in various operations, including humanitarian efforts following natural disasters. It was finally decommissioned in March 2015 after serving for 35 years.

RIMPAC 2026 Overview

RIMPAC 2026, running from June 24 to July 31, gathers an impressive array of military assets, including 30 nations, 30 surface ships, five submarines, 15 national land forces, over 190 aircraft, and 30,000 personnel. This year marks the 30th iteration of RIMPAC, founded in 1971 to enhance cooperation among allied nations and bolster maritime security in the Pacific region.

The exercises not only serve as a training ground but also forge lasting relationships and foster mutual understanding among nations committed to ensuring regional stability and security in challenging maritime environments.