What's Happening?
During the RIMPAC 2026 exercise, the Canadian submarine HMCS Corner Brook successfully sank the decommissioned USS Mobile Bay using a Mk 48 Mod 7AT heavyweight torpedo. This exercise, conducted north of Kauai, Hawaii, involved a coordinated attack with
various multinational forces employing different weapon systems. The event marked the first participation of a Canadian submarine in RIMPAC since 2014 and demonstrated Canada's ability to re-establish a complete submarine engagement chain after a prolonged period of inactivity.
Why It's Important?
The successful engagement by HMCS Corner Brook highlights the operational recovery of Canada's submarine force, showcasing its capability to participate in complex multinational exercises. This event underscores the strategic importance of maintaining a capable and modernized submarine fleet, which is crucial for national defense and international military collaborations. The exercise also reflects the broader geopolitical dynamics and the need for countries to demonstrate military readiness and technological prowess in joint operations.
What's Next?
Following the successful exercise, Canada may focus on further modernizing its submarine fleet and enhancing its operational capabilities. The experience gained from RIMPAC 2026 could inform future training and development programs, ensuring that Canadian submarines remain a vital component of the country's defense strategy. Additionally, the exercise may influence Canada's defense procurement decisions, potentially accelerating plans to acquire new submarines to replace the aging Victoria-class fleet.











