What is the horizontal distance the aircraft will travel during a level deceleration above 125 KIAS?

The correct answer indicates that during a level deceleration above 125 KIAS, the aircraft will travel approximately 0.1 to 0.2 nautical miles for every 10 knots of deceleration. This assessment is grounded in the operational characteristics of an aircraft when reducing speed in level flight. Aerodynamics and performance calculations show that as an aircraft decelerates, it covers a horizontal distance influenced largely by its speed and drag characteristics during the deceleration phase.

This value reflects a standard estimation used in aviation that helps pilots understand how much ground they can cover while slowing down. The range provided (0.1 to 0.2 nautical miles) is a practical metric for pilots, enabling decision-making regarding the approach, landing, or transitioning from high-speed flight to slower speeds.

Understanding how horizontal distance relates to changes in speed is critical for safe aircraft operation, ensuring a pilot can plan for altitude loss and trajectory changes effectively. The other options provide distances that do not align with these established performance characteristics, making them less accurate for the criteria given in the question.