Instrumentationmedium#409
IVSI (Instantaneous VSI) differs from a standard VSI by incorporating:
A
Accelerometer-driven dashpots for quicker initial response
CorrectB
A GPS input
C
A direct altimeter readout
D
Radar altitude data
Explanation
The IVSI uses small accelerometers (dashpots) to provide an immediate indication of vertical acceleration, reducing instrument lag.
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