ED Decision 2022/012/R
INSTRUMENT APPROACH OPERATIONS IN LOW-VISIBILITY CONDITIONS — CLASSIFICATION OF STANDARD APPROACH OPERATIONS
The different types of approach and landing operations are classified according to the lowest DH (or MDH) and RVR applicable to the approach type. The classification of approach types does not depend on the technology used for the approach. The lowest minima specified do not take account of ‘operational credits’ that may allow for lower operating minima.
The classification does not subdivide CAT III operations into CAT IIIA, IIIB, and IIIC. The actual minima applicable to any operation depends on the aircraft equipment and the specific LVO approval held by the air operator.
The AFM for aircraft certified for CAT III operations will state the lowest usable DH, or no DH. Some AFMs may refer to the previous ICAO classifications as follows:
— CAT IIIA: a DH lower than 30 m (100 ft) or no DH and an RVR not less than 175 m;
— CAT IIIB: a DH lower than 15 m (50 ft) or no DH and an RVR less than 175 m but not less than 50 m; and
— CAT IIIC: no DH and no RVR limitations.
CAT IIIC has not been used in Europe and the minimum RVR in the EU regulations is 75 m.
Where an operational credit allows operation to lower-than-standard minima, this is not considered a separate approach classification.
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