First photo: SC 40 during the North Sea minesweeping operations in 1919. Photograph of submarine chaser SC 40 underway. T. Woofenden Collection.
Second photo: Crewmen on SC 40 celebrating the Labor Day holiday, at Queenstown. Collection of Harry E. Betzig, CO of submarine chaser SC 181. Courtesy of his great-granddaughter Barbara Betzig White.