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NOTE: This communication facility is normally provided by UHF radio equipment and systems but the use of VHF Aeronautical Mobile Service frequencies may be permitted for ground to ground communications in specific circumstances.
6.4 Recommendation: Where conditions warrant, separate communication channels should be provided for the control of vehicles on the manoeuvring area (265).
6.5 The driver of a radio-equipped vehicle shall establish two-way radio communication with the aerodrome control tower before entering the manoeuvring area and with the appropriate designated authority before entering the apron (266).
6.6 The driver of a radio-equipped vehicle shall maintain a continuous listening watch on the assigned frequency when on the movement area (267).
NOTE: Guidance on aerodrome vehicle operations is contained in ICAO Annex 14 Attachment A Section 17 and includes operators qualifications, competency, radiotelephony operating procedures and phraseology.
7 Radio Spectrum Management
7.1 The equipment and systems shall be designed and constructed to operate within the Land Mobile Service allocation 450 MHz to 470 MHz with a channel spacing of 12.5 kHz using Frequency Modulation (FM) with ITU emission designator 11K0F3EJN using semi-duplex operation (268).
NOTE: The Base Station equipment uses duplex operation and the Land Mobile Station equipment uses simplex operation.
7.2 The equipment and systems shall be installed, operated and maintained in compliance with the terms and conditions of an ANO Approval granted by the CAA in respect of the Air Traffic Services Ground to Ground Communications being provided (269).
8 WT Act PBR Licence
Guidance: A WT Act Private Business Radio (PBR) licence issued by Ofcom will be required prior to the establishment of the Base Station and the installation or operation of equipment and systems. Further information may be obtained from Ofcom.
NOTE: All new Aeronautical Radio Stations must have been assessed as fit for purpose under the Air Navigation Order Article 205 by the CAA SRG Air Traffic Standards Division before a radio licence can be issued.
9 Equipment Specifications
9.1 Guidance: The minimum equipment requirements comprise the parameters for the licensing of the equipment, contained in the United Kingdom Radio Interface Requirement [5] published by Ofcom, in accordance with Directive 1999/5/EC [8] Articles 4.1 and 7.2 and the essential requirements in Article 3.2.
10 Inspection of UHF Equipment and Systems
10.1 The equipment, systems and associated records shall be made available for inspection by an authorised person, being a CAA SRG Regional Inspector, for the purpose of demonstrating compliance with the terms and conditions of the ANO Approval and CAP 670 requirements (270).
10.2 Guidance: Ofcom may inspect the equipment and systems to ensure compliance with the terms and conditions of the WT Act licence. Further details on the licensing and regulation of PBR may be obtained from Ofcom.
11 Radio Equipment and Telecommunications Terminal Equipment Directive (R&TTED)
UHF Radio Equipment and Systems shall comply with the R&TTED (1999/5/EC) (271).
12 Maintenance of UHF Equipment and Systems
Maintenance arrangements shall be established for UHF Radio Equipment and Systems at aerodromes associated with the provision of Air Traffic Services (272).
NOTE: Further information is contained in Part B Section 1, APP 02.
13 Communications Availability
13.1 The design, installation, operation and maintenance of equipment and systems shall be such as to ensure an availability of communications appropriate for the Air Traffic Services being provided (273).
13.2 Guidance: The availability of communications is dependent on the radio system design, including equipment configuration and power supply arrangements. The selection of equipment with the appropriate duty cycle can also reduce equipment failure. The provision of alarm / status indications is also important in ensuring that appropriate actions are taken to restore communications when a failure occurs.
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CAP 670 Air Traffic Services Safety Requirements 2(27)
