What is the ground distance covered during en route climb for Operating Conditions W-4?

To determine the ground distance covered during en route climb for Operating Conditions W-4, it's important to understand how these distances are calculated based on various flight parameters such as altitude gain, aircraft performance, and environmental factors.

The value of 61.4 nautical miles represents a calculated distance that takes into account the average climb rate and the total altitude gain associated with Operating Conditions W-4. This condition may involve specific aircraft performance characteristics, such as engine power settings, weight, and environmental conditions like temperature and wind that could affect the climb performance.

In this scenario, the 61.4 NM figure is the most accurate reflection of the typical flight profile and performance metrics for the en route climb in the defined operating conditions. It's essential for flight planning and ensuring safety and efficiency in operations, as well as compliance with regulatory standards.

Thus, the correct answer reflects a well-informed calculation of the distance based on established data for the scenario posed in the question.