At what altitude do CAT 2 aircraft typically operate?

CAT II aircraft, also known as Category II aircraft, are designed to operate in low visibility conditions and generally utilize advanced instrument landing systems to ensure safe landings. These aircraft typically operate at altitudes below Flight Level (FL) 240, or 24,000 feet. This altitude range allows them to adhere to standard instrument approach procedures while remaining safely below higher altitude air traffic, ensuring that operations can be managed effectively within controlled airspace.

The specified altitude range for CAT II operations helps facilitate a safe environment for landing in conditions where visibility may be compromised, such as during fog or heavy rain. These altitudes are aligned with the operational altitudes for specific approach procedures and the structure of air traffic control, which balances safety and efficiency in managing aircraft flying at lower altitudes.

If one considers the other options, alternatives like 10,000 feet MSL or FL 200 might suggest altitude limitations that do not fully represent the operational capabilities and regulations under which CAT II aircraft function in approach and landing scenarios. Altitudes above FL 450 typically pertain to high-altitude jet operations, which would not align with the context of CAT II operations being conducted in lower visibility conditions.