What is the fuel requirement for VFR flight during the day?

For VFR (Visual Flight Rules) flights conducted during the day, the requirement is to have a minimum of 30 minutes of fuel reserve available upon arrival at the destination. This regulation is in place to ensure that pilots have enough fuel to reach their destination safely and to handle unforeseen circumstances, such as delays in landing or needing to divert to an alternate airport.

The rationale behind the 30 minutes reserve requirement is that it provides adequate time for pilots to react to changes in weather, air traffic, or any potential mechanical issues that might arise. It reflects a balance between operational efficiency and safety, ensuring that pilots are not flying with just enough fuel to reach their destination but have a buffer to address unexpected situations.

The other options suggest different reserve times, each of which does not meet the regulatory standard for daytime VFR operations. Therefore, the correct answer highlights the necessary precautions to enhance flight safety in visual flight conditions.