What does a shadow box represent?

A shadow box serves as a symbolic representation of a sailor's career and personal achievements. It typically contains items that showcase significant moments in a sailor's life, such as awards, medals, uniform items, photographs, and other memorabilia that highlight their service and accomplishments. This display is often used to honor and celebrate the individual's contributions to the Navy, making it a meaningful way for sailors to commemorate their journeys and experiences while in service.

The other options do not accurately capture the purpose of a shadow box. A navigational training tool would not involve personal memorabilia or achievements, nor does an award simply serve to illustrate a career. Additionally, a shadow box is not intended for storing navigational charts, as its primary function is to display personal and career milestones.