Zone of confusion
Volume of space above the station where a lack of adequate navigation signal directly above the VOR station causes the needle to deviate.
PHAK Glossary — Z
2 terms, every entry under this letter, no curation. Definitions reproduced verbatim from the Pilot's Handbook of Aeronautical Knowledge glossary, FAA-H-8083-25C (July 2023).
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Zulu time
A term used in aviation for coordinated universal time (UTC) which places the entire world on one time standard.
Source. Definitions: Pilot's Handbook of Aeronautical Knowledge glossary, FAA-H-8083-25C (July 2023), reproduced verbatim from https://www.faa.gov/regulations_policies/handbooks_manuals/aviation/phak. A United States Government work. Selection: none — every entry under this letter, no curation. Check the current publication before you rely on any of it.