When signaling to decrease speed, what is the hand position and motion?

The correct choice involves extending the arm horizontally and waving it downward to signal a decrease in speed. This hand signal is clear and easily recognizable, making it effective for communicating with other team members or personnel in a tactical environment. The downward motion indicates a reduction in speed, allowing individuals to quickly understand the directive without needing verbal communication in potentially noisy or chaotic situations.

This method of signaling utilizes the natural visual line of sight, allowing for swift recognition by those who are observing. The horizontal extension minimizes the risk of confusion since it contrasts sharply with other signals, such as those used for stopping or going faster. Such clarity is critical in operations where timely and accurate communication can affect the safety and effectiveness of the entire team. The other choices use hand positions or motions that do not effectively convey the intended message of slowing down, which could lead to misunderstandings during crucial moments.