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| Acronym | Meaning | Source |
| QDM | Magnetic Heading (zero wind) | AIP |
| QDR | Magnetic Bearing | AIP |
| QEC | Quick Engine Change Unit | WATOG |
| QFE | An altimeter set to QFE will read zero when the aircraft is on the runway | |
| QMS | Quality Management System | |
| QNH | Altimeter subscale setting to obtain elevation or altitude | AIS |
| QTE | True Bearing | AIP |
| QTG | Qualification test guide | |
| QUAD | Quadrant | AIS |