Constant descent approach (CDA)[PDF]
- CDFAs with advisory VNAV guidance calculated by on-board are considered 3D instrument approach operations.
- CDFAs with manual calculation of the required rate of descent are considered 2D instrument approach operations.
Basic non-precision approach
During a non-precision approach procedure, the pilot with his aircraft descends to join the final approach fix (FAF) at the required height. Then he starts the descent until reaching the minimum descent height (MDH) and maintains this height until either the runway is in sight or the missed approach point (MAPt) is reached.
The disadvantages of this procedure are that the approach path includes several changes in the descent phase, making it difficult to achieve a stabilised approach and smooth transition to visual flight.
Constant descent angle approach (CDA)
The pilot with his aircraft descends now at a constant rate from the top of descent point or latest at the FAF, which, if continued below the MDH, the aircraft at the runway threshold should be in a position to land the aircraft.
The path of the CDA approach is coloured blue and the standard non-precision approach path is light dashed purple.
- VID 150259 - Creation
- VID 200696 - Wiki Integration
DATE OF SUBMISSION
- 17:59, 7 December 2018
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