Which document outlines grooming standards for Navy personnel?

The correct choice is NAVPERS 15665I, which specifically outlines grooming standards for Navy personnel. This document provides detailed regulations regarding uniform appearance, grooming, and hygiene that align with the Navy's emphasis on maintaining a professional image. The guidelines within NAVPERS 15665I ensure that all personnel present a uniform and disciplined appearance, which is vital to maintaining order and professionalism within the service.

Other options, while relevant to Navy operations and regulations, do not specifically address grooming standards. For example, SECNAV M-5216.5 pertains to organization and correspondence, while OPNAVINST 3120.32 covers general Navy operations and administration. NAVPERS 18068F provides information regarding specific personnel management rather than standardized grooming. Therefore, NAVPERS 15665I stands out as the definitive source for grooming standards in the Navy.