How should signaling devices be used in emergencies?

• A. Audible signaling (horn/whistle) and visual distress signals appropriate to the vessel, with spare batteries.
• B. Rely on hand signals only.
• C. Use a radio instead of signaling devices.
• D. Only use visual distress signals; audible devices are not necessary.

Answer: (A)

In emergencies, you want to maximize your chances of attracting help quickly by using both audible and visual distress signals that are appropriate for your vessel, and you should always have spare batteries for those signaling devices. Audible signals like a horn or whistle cut through noise and can be heard from a distance, while visual distress signals—such as flares, day/night signals, and distress flags—provide visible cues that responders can spot, day or night. Keeping spare batteries ensures that electronic signaling gear, lights, or beacons remain functional when you need them most. Relying on hand signals alone isn’t reliable for attracting distant help, and using a radio instead of signaling devices doesn’t replace the need for standard, visible cues that on-scene responders and other mariners can see or hear. Likewise, using only visual signals and skipping audible devices reduces notice in certain conditions, like rough seas or crowded waterways, where sound is essential to grab attention. The best approach is to deploy both types of signals and maintain ready-to-use batteries so you’re prepared for any emergency scenario.