What is Magnetic compass?

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Study for the Pilot's Handbook of Aeronautical Knowledge Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is Magnetic compass?

Explanation:
The magnetic compass shows heading relative to magnetic north. A magnetized needle aligns with the Earth’s magnetic field, so the displayed direction points toward magnetic north rather than geographic (true) north. That’s why this instrument is described as determining direction measured from magnetic north. In flight you’ll often convert magnetic headings to true headings by applying magnetic variation for your location, and you must be aware the compass can be influenced by nearby metal and electrical systems, causing errors. It’s not used for measuring airspeed or altitude—those are handled by the airspeed indicator and the altimeter.

The magnetic compass shows heading relative to magnetic north. A magnetized needle aligns with the Earth’s magnetic field, so the displayed direction points toward magnetic north rather than geographic (true) north. That’s why this instrument is described as determining direction measured from magnetic north. In flight you’ll often convert magnetic headings to true headings by applying magnetic variation for your location, and you must be aware the compass can be influenced by nearby metal and electrical systems, causing errors. It’s not used for measuring airspeed or altitude—those are handled by the airspeed indicator and the altimeter.

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