The Six Pack: Basic Flight Instruments
Pilot Institute
JANUARY 27, 2025
The Heading Indicator should not be confused with the Horizontal Situation Indicator (HSI), which is an evolution of the Heading Indicator that includes VHF Omnidirectional Range (VOR) and Instrument Landing System (ILS) indications. The pitot-static system is used to measure the static and dynamic pressure of the air during flight.
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