Which of the following is NOT a pyrotechnic visual distress signal?

The correct answer is that an acoustic sound signal is not classified as a pyrotechnic visual distress signal. Pyrotechnic distress signals are specifically designed to create a visible indicator to attract attention in emergencies, and they typically produce bright flashes of light or colorful smoke. The handheld orange smoke signal, red meteor signal, and red flare signal all produce a visual component through fire or color, making them effective for signaling distress visually.

In contrast, an acoustic sound signal relies on noise to communicate, such as a horn or whistle, which does not generate any visual indication. While sound signals can be useful for alerting others to your presence or need for assistance, they lack the visual aspect necessary to be categorized within the pyrotechnic distress signals. Understanding the difference is essential for effective communication in emergency situations on the water.