A quarter of a century later, the exigencies of war changed the Navy's evaluation of the graceful craft, as she was again inspected, this time at the 11th Naval District, in early 1942. Acquired by the Port Director of San Diego, California, from R. J. Rheem on 13 February, Zahma was placed in service on 26 February 1942. Classified as an unclassified miscellaneous vessel and designated IX-63, Zahma was based at San Diego and operated as a local patrol craft into the spring of 1943. Placed out of service on 13 April 1943, her name was struck from the Naval Vessel Register on 18 July 1944.