What is the minimum tanking altitude during nighttime VMC?

The minimum tanking altitude during nighttime Visual Meteorological Conditions (VMC) is established to ensure safety and operational efficiency while conducting aerial refueling operations. The altitude of Angels 2.5, referring to 25,000 feet, is designated as the minimum because it provides a height that reduces the risk of mid-air collisions and allows for better visibility in the potentially reduced light conditions of nighttime operations.

At this altitude, aircraft can maintain a safer distance from terrain and obstacles, while also ensuring that pilots have sufficient time to respond to any issues that may arise during the refueling process. Flying at Angels 2.5 aligns with the regulatory and safety guidelines in place, balancing the needs of fuel transfer with the imperatives of safe flight operations. In contrast, the other altitude options may not provide the same margin of safety or may not be regulatory compliant for nighttime operations. Thus, Angels 2.5 represents the appropriate compromise between altitude safety and operational capability.