Prior to takeoff, what should pilots ensure regarding ice on the aircraft?

Pilots must ensure that anti-ice systems are activated prior to takeoff to ensure the safe operation of the aircraft in potentially icy conditions. The presence of ice on the wings, tail, or other critical surfaces can significantly impair performance and reduce lift, which is particularly dangerous during takeoff. Activating the anti-ice systems helps prevent the accumulation of ice, ensuring that the aircraft can perform to its design specifications.

While the other options may touch on relevant aspects of de-icing, they do not address the immediate necessity of activating the anti-ice systems. Relying on natural melting, for instance, is not a viable option as it may not occur quickly enough or at all under certain conditions, which could compromise safety. Manual de-icing can be effective, but the requirement for pilots is centered on the proactive use of the aircraft’s built-in anti-ice systems before engaging in flight. Favorable weather conditions are also essential for safe operations, but they do not guarantee that the aircraft is free from ice, hence the focus on the activation of anti-ice systems.