Final answer:
The Silver "E" (3/16 inch) is authorized for wear on the Navy "E" ribbon for the Battle Efficiency Award.
Step-by-step explanation:
The Silver "E" (3/16 inch) is authorized for wear on the Navy "E" ribbon for the Battle Efficiency Award, or Battle "E", which is awarded annually to the small number of ships and aviation squadrons in the United States Navy that have demonstrated the highest standards of performance and readiness in their respective categories. The award is divided into four main categories: carrier, surface, submarine, and aviation. The Silver "E" is awarded to ships and aviation squadrons that win the Battle Efficiency Award for two consecutive years.