HMS Acheron S-61 at Plymouth Sound after modernization.

HMS Acheron S-61 at Plymouth Sound after modernization. The Plymouth breakwater and (Palmerston) Breakwater Fort are seen in the background.

(Caption courtesy of Philip J. Heydon, I.S.M.)

HMS Acheron S-61, date and location not available.

HMS Acheron S-61 seen passing under the Brooklyn bridge in New York City, New York.

HMS Acheron S-61 seen underway in 1967.

HMS Acheron S-61 seen in Canadian waters in 1967.