Which instrument provides the airspeed indication that pilots rely on for obstacle clearance and maneuvering?

• A. The airspeed indicator (ASI).
• B. The vertical speed indicator (VSI).
• C. The attitude indicator (AI).
• D. The heading indicator (HDI).

Answer: (A)

The airspeed indicator is the instrument that provides the airspeed reading pilots rely on for obstacle clearance and maneuvering. It measures the dynamic pressure from the pitot-static system and converts it to indicated airspeed, which directly correlates with the aircraft’s stall speed and maneuvering margins. Keeping within the indicated airspeed bands helps ensure you won’t stall in turns or climbs near obstacles and allows safe maneuvering performance. The other instruments serve different purposes—vertical speed shows rate of climb or descent, attitude shows orientation, and heading shows direction—so they don’t provide the speed information needed for obstacle clearance and maneuvering.