'Scan the area' Pointing two fingers at one's eyes and making a flat fan motion across a given space signals a team to scan the area. 'Cover me' Using both hands to point at given members of one's team, turning one's hands to point to oneself and then nodding at one's destination signals the designated members of a team to provide the leader while he or she moves to a given spot. 'Stand down' A team leader extends three fingers toward the floor or ground. 'Scout it out' A team leader may order a member of the fireteam to scout ahead by holding up two fingers, pointing toward the team member's eyes and to the intended direction, and then slowly making a fist. Sometimes two fingers are used for this gesture. 'Come forward' In combat, Spartans motion one another forward by flashing an index finger twice. Even if the computer diagnostics report everything as fine, Spartans do not take chances with their armor or any other machinery and still visually inspect each others' armor. 'Inspect armor' By making a circle in the air with one to two fingers to turn around, a Spartan signals that they want to visually inspect another Spartan's armor. 'Stay cool' A short lateral cut with the hand across the chest or mouth area signals the team to remain calm.

'Trouble ahead' A Spartan scout may signal that there is trouble ahead with a slight shake of the head from side to side. Variations of the gesture can also be used to convey other messages or emotions-to welcome someone, show respect or bid farewell, as seen when Lucy-B091 made a two-finger gesture over Kurt Ambrose's faceplate. In a more rare, emotional version of the gesture, a Spartan may swipe their fingers over another Spartan's faceplate, as seen when Kelly-087 expressed relief over seeing John-117 again after the Fall of Reach. A typical response to the 'smile' gesture is a slight nod. The smile consists of a quick swipe across one's own faceplate with two fingers. The closest thing to an emotional symbol is the 'Spartan smile,' used in place of a smile.

'Spartan smile' Having grown up as soldiers, the Spartans kept their emotions to themselves, always controlling bursts of emotion. This is particularly emphasized on missions where COM silence is necessary. Many of the Spartans' signals comprise relatively simple hand gestures that can substitute for most verbal communication.

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