Submarine chaser SC 131 served as a wing boat in Unit K (SC 130, SC 131, SC 216).
First photo, caption: "August 20, 1919. SC-131 steaming up the Hudson River after winning SC race from Bermuda to NY." Thanks to Dan Treadwell for submitting the digital image.
Second photo: Submarine chasers SC 216, SC 131 and SC 147, moored in American Bay, Base 25, Corfu, Greece. These chasers served on the Otranto Barrage. T. Woofenden Collection