Part C, Section 2, - Navigation
1 Introduction
Section 2 of Part C contains engineering requirements for navigation equipment and systems. The approval of flight inspection organisations is included in this section in recognition of their role in the approval and continuing operation of navigational aids. These documents should be used in conjunction with the Generic Requirements and Guidance contained in Part B as appropriate.
2 Scope
The 'ILS' documents cover all aspects of Instrument Landing Systems and some ILS / DME flight inspection and identity keying requirements.
MLS 01 covers general requirements for Microwave Landing System (MLS).
FLI 02 covers the procedures and requirements for the approval of flight inspection organisations. It is divided into sections covering the approval procedure, flight inspection system for navigational aids in general and specific annexes for ILS, MLS, VHF Omnidirectional Radio Range and Non-Directional Beacon (NDB).
The 'NAV' documents cover Instrumented Runway Visual Range systems, MF Non-Directional Beacons, VHF Omnidirectional Range (VOR) flight inspection, Conventional and Doppler VHF Omni-Directional Range Beacons, Distance Measuring Equipment (DME) Transponders and flight inspection requirements for Distance Measuring Equipment.
The 'VDF' document covers the flight and ground inspection of VHF Direction Finding Systems.
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ILS 01 ILS Monitors
Part 1 Preliminary Material
1 Introduction
Under the terms of Article 205 of the Air Navigation Order, all ILS installations intended for use at civil airports within the United Kingdom require approval by the CAA.
2 Scope
This document defines the monitor alarm limits and the method of testing those alarms.
Part 2 Requirements
3 Safety Objective
The equipment shall not radiate guidance signals which are outside the standard operational tolerances.
4 Near Field Monitor
4.1 Localisers shall have a minimum of one near field monitor measuring the course centreline (1412).
4.2 Glidepaths shall have a minimum of one near field monitor measuring either the glidepath angle or the displacement sensitivity (1413).
NOTE: Where multiple monitors are used, the signal from the near field monitor aerial may be split and fed into each set of monitors.
5 Far Field Monitor
5.1 Category II and III localiser systems shall be fitted with a far field monitor which measures centreline accuracy and displacement sensitivity (1414).
5.2 The monitor shall be installed near the relevant runway threshold (1415).
5.3 The far field monitor shall provide alarms to a remote point (1416), but shall not take executive action (1417).
5.4 A delay shall be incorporated in the monitor to prevent false alarms due to aircraft movement (1418).
5.5 During the time that the ILS is being used to support low visibility procedures, the output of the far field monitor shall be recorded and time stamped (1419). The minimum parameters to be recorded shall be centreline DDM and displacement sensitivity (1420).
5.6 The far field monitor output should be recorded and time stamped at all times when the ILS is operational (1421).
5.7 Means shall be available to replay or present the recorded information (2273).
5.8 Recorded information shall be retained for a minimum of 30 days (2274).
6 Monitor Correlation
6.1 Any monitors on which the integrity assessment is based shall correlate with changes in the far field (2196). This correlation shall be demonstrated for each new design of ILS transmitter, antenna or monitor system installed in the UK (1423).
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本文链接地址：CAP 670 Air Traffic Services Safety Requirements 2(30)
