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5.10 ATC PROCEDURES
5.10.1 GENERAL
CAT II and CAT III operations require special procedures for the ATC and all services on the aerodrome (maintenance, security). They are often referred to under the generic name of Low Visibility Procedures. Each aerodrome authority develops its own procedures with the ICAO All-Weather Document or ECAC n°17 as a possible aid. It is very difficult to provide in this paragraph a complete view of all those procedures. To be perfectly informed of all aspects it is preferable to refer to the two documents mentioned above.
Mainly, the procedures to be established are:
. procedures for ATC to be quickly informed of all degradations in ILS performance and to inform the pilot if necessary, . procedures for ATC to be quickly informed of all degradations in visual aids and to inform the pilot if necessary, . procedures for the protection of the OFZ by the control of ground movements,
.  procedures for the protection of the ILS critical area and the ILS sensitive area by control of ground movements and adequate separation between two aircraft on approach or one aircraft on approach and another taking-off,
. procedures for meteorological services,
. procedures for maintenance,
. procedures for security.

All procedures at Heathrow airport in London, taken from ECAC Doc n°17, are given in Attachment C.
5.10.2 ATC CLEARANCE
Clearance to carry out a CAT II or III approach must be requested from ATC, whowill activate the Low Visibility Procedures, i.e. prepare the airfield and assure appropriate aircraft separation. Such an approach may not be undertaken until the clearance has been received. It is also recommended that ATC be informed when an automatic landing is intended to be performed, to ensure, whenever possible, the same protection even in CAT 1 or better conditions.
ATTACHMENT C
ATC PROCEDURES
HEATHROW (LONDON)

 

 

 

CHAPTER 6
6. OPERATIONAL APPROVAL FILE
6.1 INTRODUCTION
6.2 AIRCRAFT REQUIREMENTS
6.3 OPERATIONS
6.4 AERODROME REQUIREMENTS
6.5 OPERATING MINIMA
This chapter is an example of an operational approval file for a first application to
the national authorities of the operator. All figures and the aircraft type (A320-211)
are used only as an example ; appropriate data should be specified by the airline at
the time of making an application.
Appropriate appendices should as well be added to this file.

6.1 INTRODUCTION
This file is presented to the authorities in support of the airline's application to obtainoperational approval to conduct CAT II and CAT III operations with the Airbus A320-211 on the aerodromes listed in Appendix to this file. This application is the airline initial application to perform CAT II and CAT III operations.
The project will be conducted in steps, starting from CAT Il to full CAT III B operations.
　
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