Dear Ms. Hubbard,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Logbooks of U.S. Navy Ships and Stations, 1941 - 1983 in the Records of the Bureau of Naval Personnel (Record Group 24) that include the deck logs of the USS Sepulga (AO-20) for April 1, 1942 to March 1, 1946. For access to these logs, please contact the National Archives at College Park - Textual Reference (RDT2) via email at email@example.com. The deck log entries may be handwritten or typed or a combination of both.
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 located the World War II War Diaries, Other Operational Records and Histories, ca. 1/1/1942 - ca. 6/1/1946 in the Records of the Office of the Chief of Naval Operations (Record Group 38) that include several War Diaries of the USS SEPULGA. These diaries have been digitized and may be viewed online using the Catalog. Please note that the Catalog does not always list items in chronological order.
War diaries are daily journals of events submitted by all but the most minor of naval commands during WWII. The operational information they contain is complementary to information provided by the ship/command's action reports. If certain information cannot be located in one series, it may sometimes appear in the other. The structure and style of information presented in the war diaries is analogous to that found in the deck logs of Navy ships. In some cases, ships submitted handwritten deck logs in lieu of war diaries.
We hope this information is helpful. Best of luck with your research!