Hull Number: SC 19

SC 19, Shown during trials of a hydrophone listening device developed in Wisconsin. SC 19 was assigned to the Second Naval District, Experimental Unit, at New London, CT. submarine chaser SC 19

Photograph of submarine chaser SC 19, from "The Liberty Badger," Volume XXXIV (1920). Yearbook of the University of Wisconsin. From the University of Wisconsin Digital Collection, available here. Fair use statement on their site.