GM3
CAT.OP.MPA.182 Fuel/energy scheme — aerodrome selection policy — aeroplanes
ED Decision 2022/005/R
BASIC FUEL SCHEME WITH VARIATIONS — FACILITIES WITH A SYSTEM MINIMUM OF 200 FT OR LESS
(a) Table 3 in AMC8 CAT.OP.MPA.182 and Table 4 in AMC9 CAT.OP.MPA.182 refer to type A instrument approach operations based on a facility with a system minimum of 200 ft or less. Such facilities include ILS/MLS, GBAS landing system (GLS) and GNSS/SBAS (LPV). The system minima for various facilities are contained in AMC3 CAT.OP.MPA.110, Table 3.
(b) In regard to system minima and type of instrument approach operation (type A or B), the following should be noted:
(1) System minimum is the lowest height to which a facility can be used without visual references. This value is not related to a particular runway or obstacle environment.
(2) The type of instrument approach operations is related to each individual runway with its obstacle environment.
(c) Amongst other things the lowest DH for an instrument approach operation is determined by the system minima for the facility and the obstacle clearance height (OCH). The resulting DH determines the type of approach operation (type A or B). If the DH is 250 ft or more, it will be a type A approach operation; if the DH is less than 250 ft, it will be a type B approach operation. So, while ILS approaches to most runways may be conducted as type B approach operations, difficult obstacle situations, driving up the DH to 250 ft or higher, will result in type A approach operations.
(d) For example, Row 2 of Table 3 in AMC8 CAT.OP.MPA.182 refers to a case where the obstacle situation and associated OCH result in a DH of 250 ft or more, even though the facility involved supports a DH of 200 ft or less.
(e) This GM refers only to DH (not MDH) since facilities with a system minimum of 200 ft or less are only operated with a DH (or DA), not an MDH.
EASA aviation regulations for aerodrome selection during flight operations address instrument approach procedures. System minima, the lowest usable height without visual references, and obstacle clearance determine decision height (DH). DH dictates approach type: 250ft+ is Type A; below is Type B. Facilities with 200ft minima use DH, not minimum descent height.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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