Where are the reference speeds, MDA, DH, and barometric altimeter settings entered?

• A. Air Data Computer
• B. Air Data Reference Panel (ARP)
• C. Standby Instrument Panel
• D. Primary Flight Display

Answer: (B)

Entering reference speeds, MDA, DH, and barometric altitude is done on the Air Data Reference Panel. This panel is the dedicated input interface for setting the performance parameters and the altitude reference pressure that the air data system uses. The Air Data Computer handles processing of sensor data to compute airspeed, altitude, and other data, but it doesn’t provide a user entry point for these values. The Standby Instrument Panel hosts backup instruments and isn’t used for entering these settings, and the Primary Flight Display simply shows the data fed from the ARP/ADC rather than serving as an input mechanism.