What does a PRIMARY altitude setting do?

What does a PRIMARY altitude setting do?

• A. It sets the barometric altitude reference used by the altimeter.
• B. RADAR warning minimum altitude setting is selected using the PUSH TO TEST switch on the Height Indicator.
• C. It enables automatic terrain following mode.
• D. It calibrates the radar antenna alignment.

Answer: (B)

Understanding how altitude-related warnings are configured on the Height Indicator is essential. The PRIMARY altitude setting selects the RADAR warning minimum altitude the system uses as a threshold for issuing warnings. You configure this value with the PUSH TO TEST switch on the Height Indicator, which is how the crew sets the radar warning minimum altitude. This function is separate from calibrating the barometric altitude reference for the altimeter, from enabling automatic terrain following, or from adjusting radar antenna alignment.

Understanding how altitude-related warnings are configured on the Height Indicator is essential. The PRIMARY altitude setting selects the RADAR warning minimum altitude the system uses as a threshold for issuing warnings. You configure this value with the PUSH TO TEST switch on the Height Indicator, which is how the crew sets the radar warning minimum altitude. This function is separate from calibrating the barometric altitude reference for the altimeter, from enabling automatic terrain following, or from adjusting radar antenna alignment.