Dear Mr. Boyer,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located 3 series related to Operation Orders in the 1970s in the Records of the U.S. Forces in Southeast Asia (Record Group 472), 2 series related to Operation Reports in the 1970s in the Records of the Office of the Chief of Naval Operations (Record Group 38), and 2 series related to Operation Orders in the 1970s in the Records of the U.S. Marine Corps (Record Group 127) that may be relevant to your research. These records have not been digitized. For access to and information about these and similar records, please contact the National Archives at College Park - Textual Reference (RDT2) at firstname.lastname@example.org.
We also located 1 reference to "OPORD 304-70" in the series Logbooks of U.S. Navy Ships and Stations, 1941-1983 in the Records of the Bureau of Naval Personnel (Record Group 24), as well as several authority records and file units related to HUKASWEX in the 1970s that may also be of interest to you. Some of these records have been digitized and may be viewed online in the Catalog. You may contact RDT2 with any questions you might have about these records.
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 hope this is helpful. Best of luck with your research!
Dear Mr. Boyer,
We have some additional information that may be helpful for your research.
We located the series Operation Plans, 1946-1971 in Record Group 38 that contains some anti-submarine warfare (ASW) operational plans. The series is incomplete, and access to it is still fully restricted due to FOIA (b)(1) National Security, Secret. You may contact the National Archives at College Park - Textual Reference (RDT2) at email@example.com with any questions you might have about these records.
For access to post-WWII U.S. Navy operational records., please write to the Operational Archives Branch, Naval History & Heritage Command, 805 Kidder Breese Street, SE, Washington Navy Yard, Washington, DC 20374-5060 or contact them via email at firstname.lastname@example.org. Their website is https://www.history.navy.mil/research/archives.html.
Finally, you may also wish to contact the Department of Defense's records manager for the Navy--currently Mr. King--to see if he can offer you any additional assistance.
Again, we hope this is helpful, and best of luck with your research!