Final answer:
Recommended holding entry procedures in aviation are determined based on the ground track of the aircraft.
Step-by-step explanation:
The recommended holding entry procedures in aviation are determined based on the ground track of the aircraft, not the aircraft heading.
Ground track refers to the actual path followed by the aircraft over the ground, taking into account the effect of wind. The ground track includes the combined effect of the aircraft's airspeed and direction, as well as the wind velocity and direction.
Holding entry procedures are designed to ensure safe and efficient traffic flow around a holding pattern. The entry procedure depends on the aircraft's ground track, as it impacts the timing and direction of the turns to enter and navigate the holding pattern.