Which equipment is required for day VFR flight according to regulations?

For day VFR (Visual Flight Rules) flight, the regulations require that the aircraft is equipped with essential instruments that ensure safe operation under visual conditions. The airspeed indicator is a critical instrument that provides the pilot with information about the aircraft's speed relative to the air it is flying through. This information is vital during maneuvering, climbing, and descending, as it helps the pilot maintain control and avoid situations such as stalls or excessive speeds.

Under the regulations, while equipment like landing lights, fuel flow indicators, and transponders have their importance, they are not mandatory for day VFR operations. For instance, landing lights may be required for night flying or certain operational scenarios, but during the day, their necessity diminishes. Similarly, fuel flow indicators and transponders serve important functions in specific contexts but are not stipulated as required equipment for day VFR flight. Thus, the airspeed indicator stands out as a fundamental piece of equipment crucial for safety during such flights.