Which instrument supplies altitude data to the MC system?

Which instrument supplies altitude data to the MC system?

• A. The electronic altimeter
• B. The radar altimeter
• C. The barometric altimeter
• D. The GPS altimeter

Answer: (A)

Altitude data for the Mission Computer comes from the aircraft’s air data system, with the electronic altimeter serving as the primary source. It converts ambient static pressure into a calibrated altitude value and feeds that digital information directly to the MC for navigation, display, and flight-control logic. The radar altimeter measures height above the ground and is used for low-altitude tasks like terrain avoidance or precision approaches; it doesn’t provide the general altitude reference the MC uses for most operations. The barometric altimeter performs the same function in older or simpler setups, but in modern avionics the electronic altimeter is the instrument that interfaces with the MC and delivers altitude data in digital form. GPS altitude can supplement altitude information but isn’t the standard instrument supplying the MC in typical configurations.

Altitude data for the Mission Computer comes from the aircraft’s air data system, with the electronic altimeter serving as the primary source. It converts ambient static pressure into a calibrated altitude value and feeds that digital information directly to the MC for navigation, display, and flight-control logic. The radar altimeter measures height above the ground and is used for low-altitude tasks like terrain avoidance or precision approaches; it doesn’t provide the general altitude reference the MC uses for most operations. The barometric altimeter performs the same function in older or simpler setups, but in modern avionics the electronic altimeter is the instrument that interfaces with the MC and delivers altitude data in digital form. GPS altitude can supplement altitude information but isn’t the standard instrument supplying the MC in typical configurations.