Which of the following equipment is necessary for VFR daytime flight?

For VFR (Visual Flight Rules) daytime flight, the regulations specify certain equipment that must be present in the aircraft to ensure safe operations. A tachometer for each engine is essential because it provides critical information about the engine's performance, including RPM (Revolutions Per Minute), which is vital for monitoring engine operation and ensuring that the engine is functioning within its designated limits. Keeping track of engine performance during flight helps in maintaining safety and efficiency.

Although other equipment listed may enhance the flight experience or be beneficial in certain situations, they are not required for VFR daytime operations. For example, a VHF radio and transponder are important for communication and airspace management, but they are not strictly mandated for VFR flights. GPS and autopilots can significantly assist in navigation and flying but are also not required for basic VFR operations. Similarly, a weather radar system can provide situational awareness in adverse weather conditions but is not a necessity for VFR daytime flying.