Which of the following is required for VFR day flight?

For VFR (Visual Flight Rules) day flight, an airspeed indicator is one of the essential instruments that must be present in an aircraft. The airspeed indicator provides the pilot with critical information about the speed of the aircraft relative to the surrounding air, which is vital for safe maneuvering, including takeoff, landing, and maintaining controlled flight. By being aware of airspeed, pilots can avoid stalling and ensure they remain within the operational performance limits of the aircraft.

The absence or malfunction of an airspeed indicator can compromise safety since the pilot needs to gauge the aircraft's performance and make informed decisions, particularly during maneuvers that are sensitive to changes in speed. Therefore, having an operational airspeed indicator aligns with regulatory requirements for safe flight operations under VFR conditions during the day.