HMCS Niagara (I57) HMS P553 Halifax

Niagara with the British Royal Navy Submarine HMS P553 (former USS S-21) alongside. This image was taken at Halifax circa 1943-44 as P553, transferred to the Royal Navy at New London on 14 September 1942, was then based at Halifax as an anti-submarine warfare training boat until returned to the USN at Philadelphia on 11 July 1944 and sunk as a target.

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