항공기의 계기판에 표시되는 속도로, 계기 오차나 설치 오차를 수정하지 않은 대기 속도.
The airspeed of an aircraft as shown on its pitot-static airspeed indicator, which is not corrected for instrument or installation errors.
예문:
"The pilot monitored the IAS closely during the descent to ensure it stayed within safe limits."
"At higher altitudes, there is a larger discrepancy between the IAS and the actual speed through the air."
"The flight manual specifies the minimum IAS required for a safe takeoff."