To obtain a copy of the naval board of inquiry records, you can submit a request to the National Archives of Australia (NAA). You may need to provide specific details such as the ship’s name (HMAS Moresby), the incident (Bell 206B helicopter ditching), and the timeframe (mid-1986). If the records are classified, you may need to apply for access under the Freedom of Information (FOI) Act. Start by searching the NAA’s online catalog, or contact them directly for guidance on accessing the relevant records.