What does the signal to "open up" look like?

The signal to "open up" is represented by extending both arms in front and sweeping them to the sides. This action effectively indicates to the members of a fire team that they should spread out or increase their distance from each other, creating a wider formation that is often necessary in operations for better coverage, maneuverability, or to avoid friendly fire. It visually communicates the intent to transition from a compact to a more expanded formation, enabling the team to cover more ground and enhance situational awareness. This hand signal is crucial in maintaining effective communication during operations when verbal instructions may not be feasible due to noise or distance.