What do signal checks inquire about?

Signal checks are critical in aircrew operations as they ensure effective communication among crew members and between aircraft and ground stations. The correct answer focuses on both the strength and readability of the signal.

Signal strength refers to the power level of the received signal, which directly impacts the ability to communicate clearly over a distance. Readability pertains to how well the signal can be understood without distortion or interference. In aviation, clear communication is vital for safety and operational efficiency, making this aspect of signal checks paramount.

While options such as signal connection status, channel encryption, and signal duration are relevant to communications management, they do not specifically emphasize the quality of the signal, which is the core purpose of a signal check. Ensuring strength and readability allows crews to reliably convey critical information, enhancing situational awareness and overall safety in operations.