What must pilots be familiar with regarding runway lengths?

Pilots must be familiar with runway lengths at all airports of intended use because this knowledge is essential for safe flight operations. Understanding the length of runways allows pilots to assess their aircraft's performance capabilities, including takeoff and landing distances required for safe departures and arrivals.

The length of the runway can significantly affect the aircraft's performance, especially under various conditions such as weight, temperature, and altitude. Familiarity with runway lengths at each intended airport helps pilots make informed decisions related to their flight planning, including fuel management, potential alternate airports, and understanding limitations when operating in specific conditions.

This awareness is crucial not only at the departure airport but also at any destination and alternate airports that might be used during the flight. Therefore, the correct approach for pilots is to be cognizant of the runway lengths at all airports relevant to their flight plan to ensure they can execute procedures safely and effectively.