GM1 Annex I Definitions

DEFINITIONS FOR TERMS USED IN THE ACCEPTABLE MEANS OF COMPLIANCE AND GUIDANCE MATERIAL

For the purpose of the Acceptable Means of Compliance and Guidance Material to Regulation (EU) No 139/2014, the following definitions apply:

(1) ‘Enhanced flight vision system 200 (EFVS 200) operation’ means an operation with an operational credit in which visibility conditions require an EFVS to be used down to 200 ft above the FATO or runway threshold. From that point to land, natural vision is used. The RVR is not less than 550 m.

(2) ‘Enhanced flight vision system (EFVS) - Approach (EFVS-A)’ means a system that has been demonstrated to meet the criteria to be used for approach operations from a decision altitude/height (DA/H) or a minimum descent altitude/height (MDA/H) to 100 ft (30 m) threshold elevation while all system components are functioning as intended, but may have failure modes that could result in the loss of EFVS capability. It should be assumed for an EFVS‑A that:

(a) the pilot will conduct a go-around at or above 100 ft threshold elevation, in the event of an EFVS failure; and

(b) descent below 100 ft above the threshold elevation through to touchdown and roll-out should be conducted using natural vision, so that aby failure of the EFVS does not prevent the pilot from completing the approach and landing.

(3) ‘Enhanced flight vision system - landing (EFVS-L)’ means a system that has been demonstrated to meet the criteria to be used for approach and landing operations that rely on sufficient visibility conditions to enable unaided roll-out and to mitigate for loss of EFVS function.

(4) ‘Obstacle clearance height (OCH)’ means the lowest height above the elevation of the relevant runway threshold or the aerodrome elevation, as applicable, used in establishing compliance with appropriate obstacle clearance criteria. Obstacle clearance height is referenced to the threshold elevation or in the case of non-precision approach procedures to the aerodrome elevation or the threshold elevation if that is more than 2 m (7 ft) below the aerodrome elevation. An obstacle clearance height for a circling approach procedure is referenced to the aerodrome elevation.

(5) ‘Special authorisation category I (SA CAT I) operation’ means a CAT I approach operation with a decision height not lower than 45 m (150 ft) and an RVR not less than 400 m and requires special authorisation.

(6) ‘Special authorisation category II (SA CAT II) operation’ means a CAT II approach operation to a runway that does not fulfil all CAT II infrastructure requirements, and which requires special authorisation.