As HMCS MARGARET BROOKE starts making headway, the calm water in the lock begins to swirl. The AOPV was transiting the St. Lawrence Seaway Lock at Iroquois, ON on 13 September 2025. The Arctic and Offshore Patrol Ship in on a Great Lakes Deployment and will transit the Great lakes to Thunder Bay.

Roger Litwiller Collection, courtesy Roger Litwiller. (RTL-IMG_1763)