What is one effective way to improve the visibility of a signal for searchers?

Adding motion to a signal is an effective way to improve its visibility for searchers because motion naturally captures attention more readily than static objects. When a signal is moving, whether it's a flag waving in the wind, a strobe light flashing, or any other form of movement, it stands out against the background. This dynamic quality can help searchers locate it more quickly, especially in environments where there may be visual clutter or when the search area is large.

Bright colors, while helpful, may not be as effective alone if the colors blend into the surroundings or if there are obstructions. Increasing the size of a signal can enhance visibility but may not always be practical, especially if the signal needs to be portable or if space is limited. Hiding a signal in a natural environment would make it less visible, which goes against the goal of signaling for search and rescue. Thus, the addition of motion to a signal leverages human perceptual tendencies, making it a strong choice for improving visibility in SAR operations.