Which record is essential for maintaining a sailor’s training and qualifications?

The correct choice is the training records, as they serve as the primary repository for documenting a sailor's completed training and attained qualifications. These records detail all the specific courses and programs a sailor has undertaken, including any certifications earned and skills developed during their service. Maintaining accurate training records is essential because they help ensure that sailors meet the necessary qualifications for their roles and can be assigned to appropriate duties based on their completed training.

Performance evaluation reports focus on assessing a sailor’s performance over a specific period but do not specifically document training achievements or qualifications. Certification history files capture certifications acquired but do not comprehensively track ongoing training progress. Operational readiness reports provide evaluations of a unit’s capabilities and preparedness levels but are not used to maintain individual sailor training records. Thus, training records are indispensable for tracking the progression and qualifications of sailors effectively.