What signaling is used to indicate turning or stopping when electronic navigation aids are unavailable?

• A. Night use lights.
• B. Sound signals from the horn and daylight hand or flag signals; night use lights.
• C. Radio calls only
• D. Visual signals only

Answer: (B)

When electronic aids aren’t available, you communicate your turning or stopping intentions using established signals that work in any weather or light conditions. Audible signals from the vessel’s horn alert nearby boats to your actions, while visual signals convey the same information. In daylight, you use hand or flag signals to show your maneuvers clearly to others. At night, you switch to light signals so your intentions remain visible. This combination of sound and visual cues ensures other mariners understand what you’re doing even if one method isn’t easily seen or heard.

Other options are incomplete because they omit essential signaling modes. Relying on only night lights misses daytime signaling and the audible cue. Relying on radio calls alone isn’t a visual cue and may not be received or understood by nearby vessels. Visual signals only omit the important audible element that can be detected regardless of line-of-sight or noise conditions.