On 9 October, "Barber" entered the Philadelphia Navy Yard for conversion to a "Charles Lawrence"-class high speed transport. Although she was reclassified APD-57 on 23 October, she did not complete the preparations for her new role until January 1945. On the 17th, she left Philadelphia and proceeded to Norfolk's convoy escort piers. For a month, the fast transport served as "school ship" for crews of APD's not yet commissioned. Each day she got underway to train these crews in evolutions such as fueling, gunfire, target tracking, and other combat procedures.