What is a defining feature of the Service Dress Uniform?

The defining feature of the Service Dress Uniform is that it typically includes a navy blue coat, a white shirt, and a necktie. This uniform is designed to present a formal appearance suitable for events such as ceremonies, parades, and other official engagements. The navy blue coat signifies professionalism and unity within the service, while the combination with the white shirt and necktie adds to the overall polished look required for these occasions.

In contrast, the other options do not accurately represent the characteristics of the Service Dress Uniform. Camouflage patterns are usually associated with operational or field uniforms rather than the formal attire of the Service Dress. Wearing the Service Dress Uniform only during training exercises is also incorrect, as it is suitable for formal events and functions beyond training. Lastly, military fatigue pants are part of a different type of uniform, focused on utility and practical use in less formal situations rather than the ceremonial nature of the Service Dress.