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Topic: 12.7 Instruments and AvionicsSource:
Question

What is the difference between a VSI (Vertical Speed Indicator) and a Variometer?

a.A VSI indicates the aircraft's vertical speed, while a Variometer indicates the aircraft's airspeed
b.A VSI indicates the aircraft's airspeed, while a Variometer indicates the aircraft's vertical speed
c.A VSI indicates the aircraft's rate of climb or descent, while a Variometer indicates the aircraft's rate of change of vertical speed

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