ROC-A Radio Operator Certificate (Aeronautical) · Question
What does the Q-code 'QNH' represent in aviation communications?
QNH signifies the atmospheric pressure at a specific location, corrected to sea level, which is used to set the altimeter.
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Question: What does the Q-code 'QNH' represent in aviation communications?
Answer options: ✅ Altimeter setting for a specific locality, corrected to sea level
- Magnetic heading to steer
- Time of arrival at destination
- True airspeed at current altitude
Correct answer: Altimeter setting for a specific locality, corrected to sea level
Explanation: QNH signifies the atmospheric pressure at a specific location, corrected to sea level, which is used to set the altimeter.
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Question explanations
- Who is responsible for ensuring that a radio operator is qualified to operate an aircraft radio station?
- When ATC issues a clearance, what is the pilot's responsibility regarding that clearance?
- While on an IFR flightplan, ATC instructs you to 'Squawk 4321'. What is your correct read-back?
- In uncontrolled airspace, what frequency is typically used for universal communication with a UNICOM station t
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