🫡🫡🫡 Airspeed Indicator Markings The Airspeed Indicator (ASI) is a vital flight instrument that displays an aircraft’s speed relative to the surrounding air. Its dial is marked with specific colored arcs and lines to help pilots quickly identify safe operating speeds and critical limits during all phases of flight. Key Details Color-Coded Markings: * White Arc: Indicates the flap operating range (lower limit is stall speed with flaps down, upper limit is max flap speed). * Green Arc: Normal op