Radio Navigationmedium#1166
A strapdown INS differs from a platform INS in that:
A
It cannot measure attitude
B
It uses mechanical gimbals
C
It requires external navigation aids
D
The sensors are fixed to the aircraft body and computations transform measurements to a reference frame
CorrectExplanation
In a strapdown INS, accelerometers and gyros are rigidly fixed to the aircraft. The computer transforms body-frame measurements into navigation-frame coordinates.
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