At the Boston Navy Yard, Charlestown, Massachusetts, on 22 August 1917, showing searchlight platform fitted to her foremast. The mizzenmast of USS Constitution is visible in the left background, with a camouflaged submarine chaser between it and the camera. See Photo #: NH 549-A for a cropped version of this photograph, emphasizing the sub chaser. U.S. Naval History and Heritage Command Photograph.