Which device is a legally required sound signal?

• A. Strobe light purpose
• B. Dye marker use
• C. Signal mirror use
• D. Whistle purpose

Answer: (D)

Having a sounding device that can be heard by others is required for small boats and kayaks. A whistle is the standard legally accepted sound signal because it reliably carries over wind, water noise, and distance, and it’s simple to use in an emergency or when you need to attract attention. It’s compact, durable, and doesn’t depend on light or visibility, which makes it dependable in rough conditions.

The other options are visual signaling tools; a strobe light helps others see you visually, but it does not create a sound signal. Dye markers and signaling mirrors convey signals by sight, not sound. Therefore they don’t satisfy the legal requirement for a sound signal. Keep the whistle easily accessible on your PFD and test it regularly so you can use it immediately if needed.