Which visual signal is not considered pyrotechnic?

The visual signal that is not considered pyrotechnic is an electric light. Pyrotechnic signals are those that produce effects through combustion or chemical reactions, typically creating bright flashes or colors that can be seen from a distance for signaling purposes. Examples of pyrotechnic signals include red flares and red meteors, which both rely on burning substances to emit their bright light.

In contrast, an electric light operates on a different principle. It uses electricity to generate light without combustion, making it a non-pyrotechnic signal. While electric lights can be effective for signaling, they do not fall under the category of visual signals that create a pyrotechnic effect.

Other options, like orange smoke, produce visible signals through chemical means and thus also categorize as pyrotechnic. Understanding the characteristics of these signals is crucial for safe boating practices, especially in emergency situations where signaling for help is necessary.