What does IAS stand for?

What does IAS stand for?

• A. Indicated Airspeed
• B. Calibrated Airspeed
• C. True Airspeed
• D. Ground Speed

Answer: (A)

A speed readout on the cockpit airspeed indicator is Indicated Airspeed. It’s the airspeed shown directly by the instrument, based on the dynamic pressure the pitot tube senses. It isn’t corrected for instrument or installation errors (that correction yields Calibrated Airspeed) and it isn’t adjusted for air density or altitude (that gives True Airspeed). Ground Speed is simply how fast you’re moving over the ground, a separate measurement. Pilots use Indicated Airspeed for control and performance decisions, including stall warning speeds and maneuvering speeds, making it the speed you read on the instrument.

A speed readout on the cockpit airspeed indicator is Indicated Airspeed. It’s the airspeed shown directly by the instrument, based on the dynamic pressure the pitot tube senses. It isn’t corrected for instrument or installation errors (that correction yields Calibrated Airspeed) and it isn’t adjusted for air density or altitude (that gives True Airspeed). Ground Speed is simply how fast you’re moving over the ground, a separate measurement. Pilots use Indicated Airspeed for control and performance decisions, including stall warning speeds and maneuvering speeds, making it the speed you read on the instrument.