What are hash marks, and where are they worn on the Navy uniform?

Hash marks are a specific insignia worn on Navy uniforms that signify the length of time a service member has served. They are particularly important as they reflect a sailor's commitment and experience in the Navy. The correct answer indicates that hash marks are worn on the left sleeve of the uniform. Each hash mark typically represents four years of service, providing a visual representation of the service member's dedication and time spent in the Navy.

The choice highlighting their association with time served and placement on the left sleeve accurately represents the tradition and significance of these marks in Navy attire. This placement is also standardized across various Navy uniforms, ensuring consistency and recognition among personnel.

In contrast, other options pertain to different insignia or symbols: commendations are indeed recognized, but they are not indicated by hash marks nor worn on the right sleeve; rank is indicated by different insignia typically worn on the collar rather than hash marks; decorative items serve a different purpose and are not worn on the cap in relation to service time. Thus, the answer emphasizing the left sleeve and time served is aligned with Navy tradition.