Which of the following instrument is used in CATII and CATIII approaches to determine decision height?(a) Barometer(b) Altimeter(c) Radar altimeter(d) Radio altimeterI got this question during an interview.I'd like to ask this question from Aviation Communication Systems in section Aviation Communication Systems of Aircraft Maintenance

Which of the following instrument is used in CATII and CATIII approach

1.	Which of the following instrument is used in CATII and CATIII approaches to determine decision height?(a) Barometer(b) Altimeter(c) Radar altimeter(d) Radio altimeterI got this question during an interview.I'd like to ask this question from Aviation Communication Systems in section Aviation Communication Systems of Aircraft Maintenance
Answer» The correct OPTION is (c) Radar altimeter Explanation: The radar altimeter instrument is used in CATII and CATIII approaches to determine the decision height of an aircraft. In contrary, the CATI APPROACH relies solely on altimeter indications.

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