What is a step climb and when is it typically used?

• A. A climb performed in steps during takeoff to reach cruising altitude quickly.
• B. Incremental altitude increases in cruise to optimize fuel efficiency or to clear weather/airspace constraints.
• C. A descent performed in steps to optimize descent speed.
• D. A maneuver to avoid weather by zig-zag altitude changes.

Answer: (C)

Incremental altitude increases in cruise to optimize fuel efficiency or to clear weather/airspace constraints. Step climbs happen after initial cruise altitude is reached: the aircraft lifts in small, staged climbs, holds briefly at each new level, then climbs again to a higher altitude. This behavior takes advantage of changing weight and performance—as fuel is burned off, the airplane can reach higher, more efficient levels with less thrust.

This approach also helps avoid weather or restricted airspace at certain altitudes by gradually moving upward as allowed by performance and ATC. It’s a long-range, fuel-management technique used in cruise rather than during takeoff or descent. The other options describe scenarios that don’t match how step climbs are used: they’re not about takeoff climbs, not a descent strategy, and not a maneuver for zig-zagging around weather.