Dear Mr. Lawlor,
Thank you for posting your question on History Hub!
We searched the National Archives Catalog and we located a file unit on SS Chirripo located in the series titled “Armed Guard Files, 1934-1946” in the Records of the Office of the Chief of Naval Operations (Record Group 38). We also located the “Armed Guard Logs, 1943-1945” in the Records of the Bureau of Naval Personnel (Record Group 24) that included logs of the SS Chirripo for 22 May 1943 to 23 July 1945. For access to and/or copies of the logs, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org.
We hope this information is helpful. Best of luck with your research!