USS Abel P. Upshur as Coast Guard cutter CG-15 in the 1930s.
In the 1920s, during the “prohibition era,” 23 flivvers and 1,000-tonners were transferred to the Coast Guard to help chase down “rum runners.”

In 1930–32, six of the Paulding-class flivvers, Monaghan, Patterson, Paulding, Roe, Terry and Trippe, were retired and replaced in by flush deckers Abel P. Upshur, George E. Badger, Herndon, Hunt, Welborn C. Wood and Semmes, which took their hull numbers CG-15–20 and served until 1934.