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In an aircraft, what things is an instrument and what things is an equipment? For example the ILS, is the Antennas located in the runway considered to be an instrument or an equipment? Or is there another example to differentiate both?

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  • $\begingroup$ Not all equipment are instruments. The voice radios for instance are definitely equipment, but they are not instruments. $\endgroup$ – MichaelK Aug 13 '18 at 13:45
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    $\begingroup$ "Equipment" is a very broad term and it covers more or less anything physical, e.g. the "equipment list" for a light Cessna includes the paint. "Instruments" are things that display measured information to the pilot in some way: altimeter, airspeed indicator etc. But that's just my opinion; words change their meanings in different contexts, and I'm not sure what context you're asking about. But if you don't get a useful answer here, you might try english.SE. $\endgroup$ – Pondlife Aug 13 '18 at 13:56
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    $\begingroup$ All instruments are equipment, but not all equipment are instruments. $\endgroup$ – Juan Jimenez Aug 16 '18 at 19:09

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