Dear Mr. Adams,
Thank you for posting your request on History Hub!
We searched National Archives Catalog and located the World War II Operations Reports, 1940-1948 in the Records of the Adjutant General's Office, 1917-1985 (Record Group 407) that may include records of the 230th Port Company, the 358th Port Battalion, and the 492nd Port Battalion. For more information about these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT2. We apologize for this inconvenience and appreciate your understanding and patience.
We also searched the Library of Congress’s Veterans History Project and located 7 oral history collections relating to the 492nd Port Battalion.
Port companies and port battalions were part of the US Army Transportation Corps. For general information about the Transportation Corps during World War II, you may be interested in the Center of Military History books The Transportation Corps: Movements, Training and Supply; The Transportation Corps: Operations Overseas; and The Transportation Corps: Responsibilities, Organization, and Operations.
We hope this is helpful. Best of luck with your family research!