Dear Ms. Klinger,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities, 1/1/1939 - 1/1/1949 in the Records of the Bureau of Naval Personnel (Record Group 24) that include the muster rolls of the USS Platte (AO-24) for WWII. For more information about these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at email@example.com.
Ancestry has digitized records Muster Rolls/Personnel Diaries (crew rosters) of U.S. Naval Ships and Stations for the dates of January 1,1941 thru January 1, 1949 and may be viewed online at U.S., World War II Navy Muster Rolls, 1938-1949. There may be a fee for this service. Instead, you may wish to check with your local public or university library as these institutions often provide free access to Ancestry.com.
To have a list of all of ships he served on, we suggest that you request a copy of his Official Military Personnel File (OMPF) if you have not yet done so. OMPFs and medical records of enlisted men of the U.S. Navy who were separated from the service after 1885 and before 1959 are located at NARA's National Personnel Records Center (NPRC), (Military Personnel Records), 1 Archives Drive, St. Louis, MO 63138-1002. To request these records, please mail a completed GSA Standard Form 180 to NPRC. Veterans and their next of kin also may use eVetRecs to request records. See eVetRecs Help for instructions. For more information see Official Military Personnel Files (OMPF), Archival Records Requests.
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. Also, NPRC will continue servicing requests ONLY associated with medical treatments, burials, homeless veterans seeking admittance to a homeless shelter, and those involving the VA Home Loan program. If your request is urgent, please see Emergency Requests and Deadlines. Please refrain from submitting non-emergency requests such as replacement medals, administrative corrections, or records research until NPRC returns to pre-COVID staffing levels. Please check archives.gov/veterans for updates to the NPRC operating hours and status. We apologize for this inconvenience and appreciate your understanding and patience.
For any additional information about the USS Platte (AO-24), please review the ship history on the Naval History & Heritage Command website.
We hope this is helpful. Best of luck with your family research!