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1.3  In practice such an alternative facility is established:
a) to enable an ATC service to be provided for a short time after the unexpected withdrawal of the main facility (the alternative facility may be known as an Emergency ATC unit); or
b) to enable an ATC service to continue to be provided for an extended period on a planned basis (the alternative facility may be known as a Contingency ATC unit).
1.4  This section provides guidance on the level of facilities to be provided in an Emergency or Contingency ATC unit.
1.5  It is recognised that where an Emergency/Contingency ATC unit is already in existence it may not meet these requirements. When changes are planned to an established facility, the Provider is expected to meet these requirements in respect of the equipment or procedures which are to be changed.
1.6  Where an established Emergency/Contingency unit exists the Provider is recommended to review the facilities provided with respect to the requirements described below and, where practicable, amend them to comply with the requirements.

2  General
2.1  The Provider shall provide to the CAA an operational requirement (OR) for an Emergency or Contingency ATC unit (194). The OR shall describe the maximum period of time for which the alternative facility is designed to be used together with other operational constraints (195).
NOTE:  The level of equipment required will be dependant on the OR and will be determined by the period that the alternative facility is to be used and the level of ATC service that is to be provided.
2.2  An Emergency ATC unit shall be equipped with facilities to enable traffic already under the control of the ATC unit either to complete a landing or leave the area of responsibility of the unit in an orderly manner (196).
NOTE:  Managers of units wishing to make significant physical or procedural changes to an existing Emergency/Contingency ATC unit or to establish such a facility are advised to enter into early discussions with their Regional Manager ATS Safety Regulation.

3  Documentation
3.1  The OR shall identify any requirements of CAP 670 ATS Safety Requirements that cannot be met from the Emergency/Contingency ATC unit (197). Application for dispensation must be supported by details of the proposed procedures that may mitigate the deficiency (198).
3.2  The OR shall identify any relevant procedures detailed in MATS Part 2 which cannot be achieved from the Emergency/Contingency ATC unit (199). The actions proposed to accommodate the absence of these procedures when operating from the Emergency/Contingency ATC unit shall be included in the OR (200).
NOTE:  These actions might include a restriction to movement rates, limiting the number of aircraft taxiing on an area not visible to the controller or restricting certain types of activity to specific weather conditions.
3.3  Any significant variation to the procedures approved for use in the Emergency/ Contingency ATC unit from those used in the main location shall be included in MATS Part 2 (201).
3.4  The procedures to be followed when transferring the provision of ATS from the normal location to the Emergency/Contingency ATC unit, either on a planned or unplanned basis, shall be included in MATS Part 2 (202).
3.5  The procedures to be followed when resuming normal operations shall be included in MATS Part 2 (203).

 

Part B, Section 3, Systems Engineering
SW 01  Regulatory Objectives for Software Safety Assurance in ATS Equipment
Part 1 Preliminary Material
1  Introduction
1.1  For the CAA to approve an ATS system (people, procedures and equipment) to enter service, arguments and evidence must be available to provide assurance that the system will perform all of its safety related behaviour within the system’s defined integrity targets.
　
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本文鏈接地址：CAP 670 Air Traffic Services Safety Requirements 1(67)