What describes a proper horn inspection result?

What describes a proper horn inspection result?

• A. Air horn assembled and canister charged, clear sound produced; electrical connections in good shape; mouth whistles not allowed.
• B. Mouth whistles allowed if loud.
• C. Horn is optional.
• D. Only visual check required.

Answer: (B)

The key idea is that a proper horn inspection checks that the vessel can emit a sound at the required audible level, not just that something is visually present. Mouth whistles are acceptable as a signaling device as long as they can produce a loud, clear signal that can be heard at the required distance. If during inspection the whistle can be blown and the sound meets the necessary intensity, that satisfies the requirement, even though an air horn or canister could also be used. The other options don’t fit because sound signaling must be verifiable by audibility, not just looked at visually; saying the horn is optional or that mouth whistles are not allowed conflicts with the rule that the signal must be audible and functional.

The key idea is that a proper horn inspection checks that the vessel can emit a sound at the required audible level, not just that something is visually present. Mouth whistles are acceptable as a signaling device as long as they can produce a loud, clear signal that can be heard at the required distance. If during inspection the whistle can be blown and the sound meets the necessary intensity, that satisfies the requirement, even though an air horn or canister could also be used. The other options don’t fit because sound signaling must be verifiable by audibility, not just looked at visually; saying the horn is optional or that mouth whistles are not allowed conflicts with the rule that the signal must be audible and functional.