Under what conditions is a signalman not required?

A signalman is not required during conditions that allow for visibility and clear communication between the aircraft and the ground personnel. Specifically, during daylight conditions, clear weather conditions, and unfavorable visibility conditions like fog, rain, whiteouts, or brownouts would dictate the necessity for a signalman.

In daylight conditions, adequate natural light enhances visibility, making it easier for the pilot and crew to communicate without the need for additional signaling personnel. The same applies to clear weather conditions, where there are no obstructions to sight, and thus, the role of a signalman becomes redundant.

However, in whiteout or brownout conditions, visibility is significantly impaired, which would actually necessitate the presence of a signalman to aid in ground communication and ensure safety during operations. Therefore, when considering all these factors, the correct scenario indicating that a signalman is not required is during daylight conditions.