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guidance or recommendations. The document is not mandatory
unless it is made a specific requirement by the regulator.
Conditional Maintenance performed after an event or specified condition,
Maintenance where the systems function, components, etc. are potentially at
risk of degradation to the point where the required system
performance / integrity is compromised.
Connection Delay The time between a request to establish a connection with a
system and the corresponding confirmation of connection.
Controlled Airspace Airspace which has been notified as Class A, Class B, Class C,
Class D or Class E airspace. (ANO)
D
Data Communications The communication equipment, sub-networks and nodes that
Network provide for the routing for the transfer of data from one system to
another.
Data Communications An organisation that provides the means to transfer data between
Service Provider an ATS facility and aircraft.
Data Link Application The implementation of data link technology to achieve specific
ATM operational functionalities.
Data Link Service A set of ATM related transactions, both system supported and
manual, within a data link application, which have a clearly defined
operational goal. Each data link application is a description of its
recommended use from an operational point of view.
Data Link Service The organisation with overall accountability for the data link
Provider service. This includes the operational requirements of the data link
system.
Data Link System The total set of component parts, equipment, software and
protocols that is required to provide the data link service.
Dead Band A term used to describe the cross-over characteristic on a 360o
potentiometer or position resolver and optical encoder alignment
errors.
Displayed Gust This is a wind speed, averaged over a 3 second sample, which has
increased from the 2 or 10-minute mean wind speed by 10 knots or
more. (CAP 746)
Distance From See Aerodrome Traffic Monitor.
Touchdown Indicator
CAP 670 Air Traffic Services Safety Requirements
E
Endorse Wherever the term 'endorse' is used in connection with safety
regulation matters this shall be taken to mean acceptance. It is not
to be confused with an ANO approval where formal methods have
been applied to secure acceptable regulatory confidence in the
approval holder.
Equipment A non-specific term used to denote any product (which may be
called by a specific name) designed and built to perform a specific
function as a self-contained unit or to perform a function in
conjunction with other units. Units are physical hardware entities,
possibly with software and firmware.
Error A deviation in any system output from normal system output
parameters.
Error Detection A process of testing for non-valid data, bit error or syntax, and
addressing problems or the event of an error being detected.
Error Rate The number of allowable errors detected within a specified time
interval.
F
Facility Performance An ILS which provides guidance information from the coverage
Category I – ILS limit of the ILS to the point at which the localiser course line
intersects the ILS glide path at a height of 60m (200 ft) or less
above the horizontal plane containing the threshold. (ICAO)
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本文链接地址：CAP 670 Air Traffic Services Safety Requirements 1(18)
