How many feet of separation are required between altitude blocks for multiple air refueling in one anchor?

The requirement for separation between altitude blocks during multiple air refueling operations in one anchor is set at 2,000 feet. This standard is established to ensure safe vertical spacing between aircraft in a busy air refueling operation, minimizing the risk of wake turbulence and ensuring that each aircraft can perform its operations without interference from others in close altitude proximity. This separation helps maintain clear airspace around each aircraft, allowing for safer maneuvers and the ability to respond to any potential emergencies or changes in flight path. Additionally, the 2,000 feet spacing provides adequate room for the necessary adjustments in altitude during the refueling process, where close coordination between various aircraft is essential for effective and safe operations.