Aircraft Operations. Volume II - Construction of Visual and Instrument ...

Chapter 5
PAR
Note.— Only PAR approaches down to OCA/H of the order of 60 m (200 ft) have been considered.
5.1 ARRIVAL PHASE OPERATIONS
The arrival phase operations through initial and intermediate approach to the extended centre line of the runway will
normally be made from an associated en-route navigation facility or within a radar vectoring area. This approach will
be made on pre-determined tracks between such fixes or as directed by radar controllers within the radar vectoring area
following radar identification. The time of flight from the last known fix should be sufficient to ensure that the radar
identification procedure may be completed. In the event of radar contact not being established, or of the pilot becoming
uncertain of his or her position, a return to the last fix should be prescribed.
5.2 INTERMEDIATE APPROACH
5.2.1 General
The interception with the descent path should be established at least 4 km (2 NM) inside the coverage of the radar.
5.2.2 Intermediate approach utilizing a suitable navigation facility or
fix on or offset from the extended centre line of the runway
Routes shall be specified from the navigation facility, fix, predetermined tracks, or as directed by the radar controller,
to intercept the extended centre line such that the aircraft, when aligned on the inbound track, is in a position from
which the final approach can be started. The distance between the point of interception with the extended centre line
and the interception with the descent path should be sufficient to permit the aircraft to stabilize (speed and
configuration) and establish on the extended centre line prior to intercepting the descent path.
5.2.3 Length
The optimum length of the intermediate segment is 9 km (5 NM) (Cat H, 3.7 km (2 NM)). The minimum length
depends upon the angle at which it is intercepted by the initial approach track and is specified in Table II-1-5-1.
However, these minimum values should be used only if usable airspace is restricted.
II-1-5-1 23/11/06