Which of the following must each crewmember have on hand during a flight?

During a flight, each crewmember must have a flashlight on hand. This is a crucial piece of equipment for several reasons, primarily related to safety and emergency preparedness. In the event of an electrical failure, loss of cabin lighting, or when conducting pre-flight inspections or checks outside the aircraft at night, a flashlight ensures that crewmembers can see and navigate safely.

While a map, notebook, and emergency kit may be useful in various scenarios, specific regulations mandate that a flashlight be readily available to enhance safety and efficiency during operations. Having adequate lighting can aid in spotting hazards, especially in low-visibility conditions, and is considered a best practice in aviation safety management. Thus, the requirement for each crewmember to carry a flashlight underscores the importance of being prepared for unforeseen circumstances during flight.