What is the minimum altitude for intentional spin entry in feet MSL?

The correct answer indicates that the minimum altitude for intentional spin entry is 13,500 feet MSL. This altitude is established to ensure that pilots have sufficient altitude to recover from a spin safely. Spin recovery can take more time and altitude than other maneuvers, and starting from a higher altitude increases the margin for recovery, decreasing the risks associated with entering a spin.

Flying at or above 13,500 feet ensures that pilots will have enough vertical space to execute a spin maneuver and still have ample altitude remaining to recover before they reach the ground. If entered at lower altitudes, the margin for error diminishes significantly, making the spin a more dangerous maneuver. Thus, setting this threshold at 13,500 feet is a critical safety measure in flight training and maneuver execution.