Initially assigned to the 7th Naval District, Alamingo plied the coastal waters of Florida until sometime in 1947. At that time, she was transferred to the 5th Naval District and based at Norfolk, Virginia. After almost a decade of service in the Chesapeake Bay area, the large harbor tug was reassigned to the 3d Naval District late in 1956. She spent the remaining years of her naval career operating in and around New York. In February 1962, Alamingo was reclassified a medium harbor tug and was redesignated YTM-227. Her name was stricken from the Navy list in September 1964.