How is an "interval" defined regarding personnel in formation?

An "interval" in the context of personnel in formation refers specifically to the space between individuals from shoulder to shoulder. This measurement is crucial in maintaining the proper spacing and alignment within a formation, allowing for effective movement and visibility of personnel. Proper interval ensures that individuals can perform their duties without interference from nearby members, fostering an orderly appearance and enhancing the overall effectiveness of the unit during drills or inspections.

Understanding this concept helps personnel recognize the importance of spacing in maintaining discipline and cohesion within military formations, which is essential for operational readiness and professionalism.