In terms of what is available online, I'm aware of the following.
War diaries, war history, reports, etc.
Muster rolls are available on Ancestry. If you don't have a subscription, you might want to check your local libraries to see if they offer access to their patrons.
The following from the Naval History and Heritage Command.
NAVSOURCE (unofficial website)
Thank you. This is a great start. Much appreciated. Wishing you all the best in the new year.
Dear Mr. Stein,
Thank you for posting your request on History Hub!
In addition to the online records mentioned in the previous response, you also may be interested in some of the records the National Archives has that are not online.
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 Duluth (CL-87) from 18 September 1944 through 25 June 1949. We also located World War II Action and Operational Reports in the Records of the Office of the Chief of Naval Operations (Record Group 38) that may include reports submitted by the USS Duluth. For more information, please contact the National Archives at College Park - Textual Reference (RDT2) via email at email@example.com.
Additionally, we located Precommissioning Training Files, 1944 - 1946 in the Records of Naval Districts and Shore Establishments (Record Group 181) that includes a file for the USS Duluth (CL-87). For more information about these records, please email National Archives at Boston (RE-BO) at firstname.lastname@example.org.
Photographs of various U.S. Navy activities dating from 1940 to 2007 are in the custody of the National Archives at College Park - Still Picture (RDSS). Please contact RDSS via email at email@example.com to request a search for photographs of specific ships.
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, RD-BO, and RDSS. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!
This is very helpful. Thanks. It is so helpful to have a knowledgeable person assist. You are saving me a lot of time and frustration. Have a happy new year.