Canada's only operational submarine, HMCS Corner Brook, participated in a live-fire exercise off the coast of Hawaii, where it sank the decommissioned U.S.warship USS Mobile Bay.

The exercise, part of the annual RIMPAC (Rim of the Pacific) multinational naval drills, involved 30 nations, 30 surface ships, five submarines, and over 30,000 personnel.

The USS Mobile Bay, commissioned in 1987, had a 36-year service history, including deployments to Operations Desert Shield, Desert Storm, and Iraqi Freedom, as well as humanitarian missions.Decommissioned in August 2023, the ship was used as a target for the exercise, which aims to enhance maritime cooperation and readiness.Canada, which co-founded RIMPAC in 1971, has participated in every edition since.The event highlights the strategic importance of naval exercises in maintaining global security and interoperability among allied forces.

The Canadian submarine's involvement underscores its role in international defense partnerships, while the use of a decommissioned vessel emphasizes cost-effective training methods.The exercise also showcased Canada's contribution to collective security, with over 800 Armed Forces members and specialized equipment deployed.

This incident reflects the ongoing collaboration between nations to address maritime challenges and strengthen military capabilities through joint operations.