Which type of smoke is primarily used for signaling purposes?

Marking smoke is specifically designed for signaling purposes because it produces a distinct and highly visible color or pattern that can be easily recognized from a distance. This type of smoke serves to mark specific locations on the battlefield or indicate particular actions, making it effective for communication between units or for directing friendly forces.

Obscuring smoke, while important for concealing movement or actions from the enemy, does not focus on visibility for signaling. Screening smoke is used to create a barrier against enemy observation and fire, enhancing concealment but not primarily for signaling. Deception smoke is aimed at misleading the enemy about troop movements or positions, further diverging from the intent of signaling. These differences highlight why marking smoke is the best choice for communication and signaling needs in military operations.