(un)availability of a CDR, tactical re-routing will be instructed by ATC.
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Annex 4E – Page 3
5. ASM REQUIREMENTS
5.1 Expected High CDR Availability for most of the time or during fixed time (See
. 8a)
5.1.1 The question associated with . 8a, based on expected high CDR availability, is: would the proposed route expected to be available for most of the time (i.e. H 24) or during fixed time period (e.g. at week-ends, nights or at peak hours) and any very rare long-term closure be published with appropriate AIS notice ? If the answer is ‘yes’,
the route should be categorised as a CDR1. If the answer is ‘no’, progress to ..
Note: If the answer to . 8a is either ‘yes’ or ‘no’, this means that tactical rewriting being not possible, CDR (un)availability requires in any case action to refile the flight plan.
5.2 Expected High CDR Availability for most of the time or during fixed time (See . 8b)
5.2.1 The question associated with . 8b, based on expected high CDR availability, is: would the proposed route expected to be available for most of the time (i.e. H 24) or during fixed time period (e.g. at week-ends, nights or at peak hours) and in the event of short notice unavailability, tactical re-routing be instructed by ATC (See Note
below . 0 and . 0)? If the answer is ‘yes’, the route should be categorised as a CDR1. If the answer is ‘no’, then the route proposal should be categorised as a CDR3.
5.3 CDR 2 Availability Criteria (See . .)
5.3.1
The question associated with . ., to confirm that a proposed route was eligible for categorisation as a CDR 2 is: would the minimum activation time of the route be two hours or more as defined in para. 4.5.4.i ? If the answer is ‘no’, it should be rejected for categorisation as a CDR altogether.
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