What is Pyrotechnic visual devices in boats?

Pyrotechnic visual devices on boats are safety tools designed to signal for help or indicate a vessel's location in emergencies. These devices typically include flares, smoke signals, and aerial pyrotechnics that produce bright lights or colors to enhance visibility. They are essential for maritime safety, especially in distress situations, to alert nearby vessels or search and rescue teams. Proper training and knowledge of their use are crucial for effective deployment.