Which device provides a loud signal for vessels?

• A. Strobe light purpose
• B. Attract attention with sunlight reflection
• C. Loud signal for vessels
• D. Visual distress signal, day/night use

Answer: (C)

Audible signaling devices are the way to get a loud signal across to other vessels. A whistle or horn makes a sound that can carry over engine noise, waves, and distance, so you can attract attention, communicate, or call for help even when visibility isn’t ideal. Visual signals, like strobe lights or reflective glare, are important for being seen, but they depend on sight and don’t produce sound. Since the question asks for a loud signal, an audible device is the best fit.