Which of the following is a requirement for enlisted advancement?

The requirement for enlisted advancement involving a Commanding Officer (CO) recommendation is based on the importance of leadership assessment in the U.S. Navy. The CO's endorsement signifies that the service member has demonstrated the necessary skills, performance, and potential for increased responsibility. This recommendation is crucial as it reflects the CO's judgment on the individual’s readiness and suitability for advancement within their career path.

While educational achievements, internships, or organizational memberships can enhance a sailor’s profile and reflect positively on their commitment to personal and professional development, they are not mandatory prerequisites for advancement. Each advancement evaluation takes into account the individual’s overall performance, including but not limited to the CO's recommendation, which carries significant weight in the decision-making process for promotions.