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Navigationmedium#262

Mach number is the ratio of:

A

TAS to the local speed of sound

Correct

B

IAS to CAS

C

GS to TAS

D

CAS to EAS

Explanation

Mach number = TAS / local speed of sound (LSS). At FL350 with LSS around 575 kt, Mach 0.80 = TAS of 460 kt.

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