Lost in the translation, none assigned yet.
About 2013.
For anyone still wondering, the full text of PANS-OPS ICAO Doc 8168 has some good didactic value. In the quote that follows, some dead wood was cut by yours truly.
Originally Posted by INSTRUMENT APPROACH OPERATIONS
Prior to the introduction of PBN procedures, there was a simple relationship between instrument approach procedures and instrument approach operations: a) non-precision approach procedures (NPA) were published which were flown as a two-dimensional (2D) operation; and b) precision approach procedures (PA) were published which were flown as a three-dimensional (3D) operation.
With the introduction of a variety of PBN vertically guided approaches which are not precision approaches (for example, the APV baro-VNAV approach and satellite-based augmentation system (SBAS) APV-I approach) there is no longer a simple relationship between the approach procedure and the type of operation. From an operational perspective, the classification of different instrument approach procedures into precision, non-precision, etc., is no longer relevant. The important classification is whether the approach is operated as 2D or 3D.
There are two methods for flying instrument approach operations, 2D and 3D. In a 2D approach operation, only lateral guidance will be displayed to the pilot, for example, in the form of a very high-frequency omnidirectional radio range (VOR) needle or ILS lateral deviation scale. A 3D approach operation will also provide vertical guidance in the form of a vertical deviation scale. The nature of the instrument approach operation depends on both the instrument approach procedure and the technique used to fly the procedure.
The CDFA technique can support either 2D or 3D approach operations and is a method of flying a non-precision approach. There are two methods of flying the CDFA: a) using a manually calculated descent profile (rate/angle of descent); and b) using a descent profile calculated by the on-board equipment such as baro-VNAV or SBAS.
Apologies for the thread creep. Once vilas reads the FCOM to someone, it is officially answered anyway.
