Final answer:
The Judge Advocate General (JAG) is the officer designated as the CNO's Sexual Assault Prevention and Response (SAPR) officer and directs the implementation of Navy-wide SAPR efforts.
Step-by-step explanation:
The individual designated as the Chief of Naval Operations' (CNO's) Sexual Assault Prevention and Response (SAPR) officer, who directs the implementation of Navy-wide SAPR efforts, is the Judge Advocate General (JAG). The JAG provides oversight and ensures that the Navy's policies and programs related to preventing and responding to sexual assault align with the Department of Defense's guidelines and regulations. The role of the JAG Office includes developing training, advising command leaders, and working to improve victim support mechanisms within the Naval Services.