Which factor does not influence the indicated airspeed needed for a planned arrival?

Indicated airspeed is a crucial element in flight planning and navigation, as it directly impacts the aircraft's performance and ensures safe operations during the flight. The indicated airspeed needed for a planned arrival is influenced by factors that affect the time it takes to reach the destination, the efficiency of the aircraft during the flight, and environmental conditions.

The distance between points plays a significant role in determining the indicated airspeed required to arrive on time. A longer distance may necessitate a higher airspeed to ensure the aircraft can reach the destination within the desired time frame.

Flying altitude also affects indicated airspeed due to variations in atmospheric density, which influences aircraft performance. Depending on the altitude, different airspeeds may be required for optimal engine performance and lift.

Wind direction is another factor to consider, as it can either aid or hinder the progress towards the destination. A headwind increases the effective travel distance and time, requiring adjustments to indicated airspeed to stay on schedule, whereas a tailwind might allow for lower airspeed while still meeting arrival times.

In contrast, the departure time of the flight does not directly influence the indicated airspeed necessary for arrival. While it may impact the overall flight schedule or operational considerations like air traffic, it does not change the air