What is the reference for the DON Correspondence Manual?

The correct reference for the Department of the Navy (DON) Correspondence Manual is indeed the SECNAV M-5216.5. This manual provides comprehensive instructions on how to write, format, and manage official correspondence within the Navy and Marine Corps.

The DON Correspondence Manual serves as an essential tool for ensuring that communication is clear, effective, and adheres to uniform standards across various levels of the organization. It includes guidelines on the preparation of memos, letters, and reports, which are critical for maintaining professionalism and accountability in Navy correspondence.

In contrast, the other documents listed serve different purposes. For instance, OPNAVINST 5215.17 pertains to the Navy’s records management program, providing instructions for managing official documents and records. NTRP 4-02.21 is related to operational medicine and readiness in a tactical environment, while NAVMEDCOMINST 6230.2 outlines policies regarding immunizations and preventive medicine for Navy personnel. Each of these references is essential to their specific fields, but SECNAV M-5216.5 is the definitive guide specifically focused on correspondence standards and practices within the Department of the Navy.