scope:

Purpose of This Order. This order lists the minimum requirements for evaluation and approval of ground facilities supporting Category I (CAT I) and Category II (CAT II) instrument landing system (ILS) approaches to runways which do not meet all performance or equipment requirements of a U.S. Standard or International Civil Aviation Organization (ICAO) Standard, and for all CAT II and category III (CAT III) ILS approaches. Specifically this order:

a. Lists the minimum requirements for CAT II and III ILS operations at various facilities. The Federal Aviation Administration (FAA) criteria for CAT II and III ILS operations meet ICAO CAT II and III standards;

b. Implements FAA policy regarding CAT I ILS approaches using a Runway Visual Range (RVR) minimum of 1800 feet and a decision height (DH) of 200 feet, and CAT I ILS approaches using a RVR minimum as low as 1400 feet and a radar altimeter (RA) DH as low as 150 feet height above threshold (HATh) at runways which do not have touchdown zone (TDZ) and/or runway centerline (RCL) lighting;

c. Implements requirements for CAT II ILS approval to runways which do not meet the equipment requirements of a U.S. Standard or ICAO Standard; and

d. Implements FAA policy regarding CAT II ILS approach operations with a RVR minimum of 1000 feet to runways which meet U.S. and ICAO standards for CAT II equipment, performance, and lighting.