What is Double Interval?

• A. The lateral space between Soldiers, measured from right to left by raising both arms shoulder high with the fingers extended and joined (palms down) so that the fingertips are touching the fingertips of the Soldier to the right and left.
• B. The lateral space between Soldiers, measured from right to left by the Soldier on the right placing the heel of his left hand on his hip.
• C. The lateral space between Soldiers, measured from right to left by the Soldier on the right holding his left arm shoulder high, with the tip of his middle finger touching the right shoulder of the Soldier to his left.
• D. The lateral space between Soldiers, measured from right to left by counting steps between Soldiers.

Answer: (A)

Double interval is the lateral spacing between Soldiers measured from right to left by extending both arms at shoulder height with fingers extended and joined, palms down, so the fingertips touch the fingertips of the Soldiers to the right and left. This method provides a consistent, even gap in the formation because each Soldier uses a standard two-arm span to contact both neighbors. The other descriptions describe different hand positions or methods (one hand on the hip, fingertips touching a neighbor’s shoulder, or counting steps), which do not establish the conventional double interval.