What is the distinguishing feature of a handheld orange smoke signal?

A handheld orange smoke signal is specifically designed to produce a vivid orange smoke, which serves as a visual distress signal for maritime or emergency situations. The bright orange color of the smoke is easily recognizable and can be seen over long distances, especially against natural backdrops like water or land. This feature is crucial for attracting attention from rescuers or passing vessels, as it contrasts sharply with the environment and indicates a need for help.

In comparison, while some other flares or signals may produce noise or light, the key characteristic of a handheld orange smoke signal is its ability to generate that distinctive orange smoke. The combination of visibility and color makes it an effective signaling device, particularly in situations where visual signals are necessary. Other options may include features like loud noises or reflective surfaces, but these do not capably define the smoke signal itself, which prioritizes the production of orange smoke for identification and rescue purposes.