Which of the following is NOT a type of security discipline in a combat situation?

In a combat situation, security disciplines play a crucial role in maintaining operational effectiveness and ensuring the safety of personnel. Light discipline essentially refers to the management of lighting to avoid detection by the enemy. It involves controlling the use of flashlights, vehicle lights, and other luminous sources to remain concealed.

Sound discipline refers to managing sounds to minimize detection by opposing forces. This can involve maintaining silence during movement, using muffled voices, and avoiding unnecessary noise that could alert the enemy.

Noise, while seemingly similar to sound, often refers to unwanted or disruptive sounds that can give away a unit's position. It emphasizes the need to control all types of auditory signals that might compromise stealth.

Litter, on the other hand, does not constitute a type of security discipline. It refers to medical evacuation equipment or the act of moving injured personnel rather than a management tactic used to maintain stealth or avoid detection in a combat environment. This distinction is crucial in understanding the different elements that contribute to successful operational security during combat engagements.