Which instrument receives static pressures from the secondary pitot system?

The standby altimeter is designed to receive static pressures from the secondary pitot system as a backup measure in the event that the primary system fails. This instrument serves to provide an additional reference point for altitude, ensuring that pilots still have access to critical data even if the main instruments become unreliable.

Static pressure data is crucial for the altimeter's function because it measures altitude based on air pressure changes as the aircraft ascends or descends. The standby altimeter maintains accuracy by utilizing a separate, independent source, which is vital for safety and operational reliability.

The primary altimeter, while essential for determining altitude as well, relies on the primary pitot system and does not utilize the secondary system for its readings, which means it would not be the correct choice. The airspeed indicator is primarily concerned with dynamic pressure rather than static pressure and does not derive its readings from the static system in the same manner. The artificial horizon provides orientation information based on aircraft attitude and does not use static pressure data at all, making it unrelated to the question.