Which of the following is NOT part of the equipment required for VFR Day?

In the context of VFR (Visual Flight Rules) Day requirements, the equipment list mandated by the FAA includes several essential instruments to ensure safe flight operations during daylight hours. Specifically, the required instruments include an airspeed indicator, a tachometer, and an oil pressure gauge. These instruments provide vital information about the aircraft's performance and engine operation.

The directional gyro, while an important navigational instrument, is not a requirement for VFR Day operations. It falls under the category of equipment that is beneficial but not mandated for visual flight during the daytime. Understanding these distinctions helps pilots recognize the necessary tools for maintaining compliance with regulations while ensuring safe and effective flight operations. The exclusion of the directional gyro from the VFR Day requirements emphasizes that pilots can operate safely without it when flying under visual conditions during the day.