Horizontal Situation Indicator(HSI)
Definition
A navigation instrument combining a heading indicator with VOR/ILS course deviation information. The HSI provides an intuitive top-down view of the aircraft position relative to the desired course.
Why Horizontal Situation Indicator Matters for Pilots
Instrument knowledge is tested on every pilot certificate exam. Understanding how Horizontal Situation Indicator works helps you interpret cockpit information correctly and recognize instrument failures before they become emergencies. This knowledge is especially critical for instrument-rated pilots flying in reduced visibility.
Exam Tip
This concept is commonly tested in instruments-related questions on FAA and EASA exams. Make sure you can explain Horizontal Situation Indicator in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.
Related Terms
Heading Indicator(HI)
A gyroscopic instrument showing aircraft magnetic heading without the oscillatio...
Course Deviation Indicator(CDI)
A needle showing lateral displacement from the desired course, whether VOR radia...
VHF Omnidirectional Range(VOR)
A ground-based radio navigation aid transmitting radials in all directions. Pilo...
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