This guideline is the sector ‘equivalent’ to Guideline St1.1
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Design Guidelines for the design of Structures and Sectors areas have been presented in this chapter. To the extent possible, designers are encouraged to apply the above guidelines when designing structures and sectors. In most instances, these guidelines are applied in combined form. Where specification situations render it impossible to successfully apply combinations of guidelines, trade-offs are required. (See Chapter 7). The attention of designers is drawn to the fact that these guidelines do not constitute design criteria. It is incumbent upon designers to use the design criteria for Routes and Holds contained, inter alia, in ICAO Doc. 8168 and Annex 11 when designing these routes and holds. A full set of document references pertaining to Terminal Airspace design are located at Part C, Chapter 1 Attachment C.1-1.
A checklist for undertaking the Conceptual design of Structures and Sectors can be found at Chapter 8, Attachment C.8-1.
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Attachment C.6-1
Sample Sector Options & Evolution
OPTION 1

No separate APP ATSU is established.
All sectorisation is associated with the ACC.
Traffic density is sufficiently low to be handled by a single ACC en-route sector.
ACC EN-ROUTE SECTOR 
ACC EN-ROUTE AND ARRIVAL/DEPARTURE SECTOR 
TOWER 

As traffic density increases, it may be necessary to establish a dedicated ACC Sector, combining the functions of en-route and arrival/departure.
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OPTION2

ACC EN-ROUTE AND ARRIVAL/DEPARTURE SECTOR 
APP ARRIVAL/DEPARTURE SECTOR 
TOWER 

The ACC Sector handles both the En-route function and some of the Arrival/Departure traffic.
Traffic closer to the airport is handled by a separate APP Arrival/Departure Sector.
ACC EN-ROUTE AND ARRIVAL/DEPARTURE SECTOR  ACC EN-ROUTE AND ARRIVAL/DEPARTURE SECTOR 
APP ARRIVAL/DEPARTURE SECTOR 
TOWER 

As traffic density increases further, there may be a need for additional sectors within the ACC’s area of responsibility. This example shows two ACC Sectors, each with some En-route and Arrival/Departure responsibilities.
ACC EN-ROUTE SECTOR 
ACC ARRIVAL/DE PARTURE SECTOR 
APP ARRIVAL/DEPARTURE SECTOR 
TOWER 

Alternatively, the ACC tasks may be sectorised to provide a dedicated ACC En-route Sector and one or more ACC Arrival/Departure Sectors.
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OPTION 3

ACC EN-ROUTE SECTOR 
APP ARRIVAL/DEPARTURE SECTOR 
　
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