What sound signaling device should boats have and what is it used for?

• A. A whistle or horn; used to signal your presence, pass other vessels, or indicate maneuvers
• B. A bell to indicate speed
• C. A radio to call for help
• D. A siren to deter pirates

Answer: (A)

A whistle or horn is the sound signaling device boats should have because it lets others hear you and understand your intentions, which helps prevent collisions in traffic or low-visibility conditions. It’s a portable, audible way to signal your presence, to indicate you plan to pass, or to communicate maneuvers to nearby vessels. Other devices don’t serve this same traffic-safety role: a bell isn’t the standard signaling tool for communicating with other boats, a radio is for contacting shore or emergency services rather than producing audible signals for nearby vessels, and a siren to deter pirates isn’t a recognized or appropriate safety device on recreational boats.