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At high speed, the ASI reads in terms of:
A
True airspeed (TAS)
B
Calibrated airspeed (CAS), which needs corrections for compressibility and density to get TAS
C
Ground speed
D
Mach number
B
Calibrated airspeed (CAS), which needs corrections for compressibility and density to get TAS✓ Correct Answer
Explanation
The ASI reads indicated/calibrated airspeed; at high speed, compressibility error becomes significant and must be corrected to obtain EAS and TAS.
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