📢 Q. A distress signal on deck.

The correct answer is D, 'All of the above.' Distress signals on deck can be issued using various methods, including pyrotechnics, open fire, or Flag NC. Each of these methods serves as a recognized distress signal under maritime safety regulations.

• Pyrotechnics, such as flares, are commonly used to signal distress due to their bright and visible nature.
• Open fire is another method that can attract attention, though it may be used with caution to avoid hazards.
• Flag NC is a signal recognized by international maritime standards, indicating a distress situation.
• These signals are vital for emergency situations, ensuring that a distressed vessel can be located and rescued.
• Proper training and readiness are crucial for the crew to use distress signals effectively in emergencies.