What documentation is necessary for a Sailor to prove completion of all required training before retirement?

To demonstrate completion of all required training before retirement, a Sailor must rely on the service record. The service record contains a comprehensive account of a Sailor's training, assignments, evaluations, and other critical career milestones. It serves as an official document that can be reviewed by personnel and administrative staff to verify that all training requirements have been met.

The service record is particularly important because it is a consolidated and authoritative source that encompasses various aspects of a Sailor's career, including completed courses and certifications, which are essential for ensuring that all prerequisites for retirement are satisfied. It also helps in providing a clear history of one’s training and qualifications, thus making it easier for review during the retirement process.

While other documents like training records or certifications of achievement may contain information about specific training completed, they do not provide the holistic view or official verification needed for retirement purposes. Therefore, the service record is the necessary documentation to confirm that a Sailor has completed all required training before retiring.