What should the "P" stand for in the engine-out emergency checklist?

In the context of an engine-out emergency checklist for helicopters, the "P" stands for "Pitch for best glide." This is crucial because during an engine failure, maintaining the appropriate airspeed is vital for maximizing distance and achieving a safe landing. Best glide speed helps optimize the helicopter's lift-to-drag ratio, allowing the pilot to cover more ground while descending. This technique enables the pilot to select the most suitable landing area and manage the descent effectively.

The other choices, while related to emergency procedures, do not accurately reflect the best practices for managing a helicopter in a situation of engine failure. "Plan for emergency landing," although important, would typically encompass broader actions rather than focusing specifically on immediate pitch adjustments to maximize glide performance. Focusing on "Pitch for best climb" does not apply during a descent after engine failure, as climbing is not possible. "Prepare for turbulence" is not directly relevant in the context of an engine-out procedure and would not aid in the immediate management of the aircraft's descent and glide characteristics. Therefore, focusing on pitch to achieve the best glide is the most critical action during an engine failure situation.