AMC2 SPA.LVO.100(b)
Low-visibility operations and operations with
operational credits
INSTRUMENT APPROACH OPERATIONS IN LOW-VISIBILITY CONDITIONS — CAT III OPERATIONS
For CAT III operations, the following should apply:
(a) For operations in which a DH is used, the DH should be determined by the use of a radio altimeter or other device capable of providing equivalent performance and be not lower than:
(1) the minimum DH specified in the AFM, if stated;
(2) the DH to which the flight crew is qualified to operate.
(b) Operations with no DH should only be conducted if:
(1) operation with no DH is specified in the AFM;
(2) there is no published information indicating that the approach aid or aerodrome facilities cannot support operations with no DH; and
(3) the flight crew is qualified to operate with no DH.
(c) The lowest RVR to be used should be determined in accordance with Table 5.
Table 5
CAT III
operations minima: RVR (m) versus DH (ft)
|
DH (ft) |
Roll-out control/guidance system |
RVR (m)* |
|
50-99 |
Not required |
175 |
|
0-49 or no DH |
Fail-passive |
125 |
|
Fail-operational |
75 |
* Note: For a fail-passive or HUD roll-out control system,
a lower RVR value (no lower than 75 m) can be used if stated in the AFM
provided that the equipment demonstrated such capability as part of the
certification process. This is provided that the operator has implemented the
appropriate operating procedures and training.
For CAT III low visibility landings, decision height (DH) relies on radio altimeters and pilot qualifications. No DH operations require AFM specification, facility suitability, and crew qualification. Minimum runway visual range (RVR) depends on DH and roll-out guidance systems, potentially reaching 75m with certified equipment, procedures, and training.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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