Transponders must be on in which airspace?

Prepare for the Instrument Flying Exam. Utilize flashcards and multiple choice questions, each with hints and explanations. Ensure readiness for your test!

Multiple Choice

Transponders must be on in which airspace?

Explanation:
The main idea here is that radar surveillance and identification by ATC are provided in controlled airspace, so a functioning transponder with altitude reporting is required there. The transponder responds to radar interrogations with a code and, if equipped, your altitude. This enables ATC to see and manage your position and level, which is essential for safe separation. Therefore, in all controlled airspace you must have it on. In uncontrolled airspace, ATC does not provide radar separation, so there isn’t a general requirement to have the transponder on. The other options imply requirements that don’t apply to all controlled airspace or depend on ATC asking you to turn it on, which isn’t correct.

The main idea here is that radar surveillance and identification by ATC are provided in controlled airspace, so a functioning transponder with altitude reporting is required there. The transponder responds to radar interrogations with a code and, if equipped, your altitude. This enables ATC to see and manage your position and level, which is essential for safe separation. Therefore, in all controlled airspace you must have it on.

In uncontrolled airspace, ATC does not provide radar separation, so there isn’t a general requirement to have the transponder on. The other options imply requirements that don’t apply to all controlled airspace or depend on ATC asking you to turn it on, which isn’t correct.

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