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What two instruments does a horizontal situation indicator (HSI) combine into one display?
Choices
✓ The heading indicator and the VOR/ILS course deviation indicatorcorrect
The HSI merges the heading indicator and the course deviation indicator onto one face.
The airspeed indicator and the altimeter
Those are pitot-static instruments, not what the HSI combines.
The attitude indicator and the turn coordinator
The HSI combines heading and course, not the attitude and turn instruments.
The magnetic compass and the vertical speed indicator
The HSI does not incorporate the VSI or the wet compass.
Why
An HSI combines the heading indicator and the VOR/ILS course deviation indicator into one instrument, showing heading, selected course, and course deviation together and reducing reverse-sensing errors.
FAA source: PHAK Ch. 8browse the reference library →
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.