This photo was likely taken in 1950. The cruiser HMCS Ontario was originally HMS Minotaur before being transferred to the Canadian Navy in May 1945. After the war she became a training ship with the Canadian Navy. This photo was clearly taken on or near the bridge of the ship. The caption written on the photo has the name "Antigonish" crossed out and replaced with "Ontario." Since HMCS Antigonish was a single gun River Class frigate while HMCS Ontario mounted nine 6" guns in three turrets, it suggests that the person who wrote the caption wasn't in the Navy, though the photographer clearly was.