6.5 SUMMARY ....................................................................................................................................C-6-16

Figure 6- 1: Striking the balance .....................................................................................C-6-3
Figure 6- 2: Phased Approach........................................................................................C-6-4
Figure 6- 3: Protection of IFR flight paths .......................................................................C-6-5
Figure 6- 4: Continuous Protection for IFR Flights..........................................................C-6-5
Figure 6- 5: No ‘fixed’ shape for Terminal Airspace........................................................C-6-6
Figure 6- 6: ‘Compatibility’ between Routes & Structure (Simplified)..............................C-6-7
Figure 6- 7: Application St3.............................................................................................C-6-8
Figure 6- 8: Application St3.2..........................................................................................C-6-8
Figure 6- 9: Fused Terminal Airspaces to improve ATM.................................................C-6-9
Figure 6- 10: Sectorisation Types .................................................................................C-6-11
Figure 6- 11: Application Se1........................................................................................C-6-13
Figure 6- 12: Placement of Holding Areas ....................................................................C-6-13
Figure 6- 13: Protected Airspace – Sector Boundary....................................................C-6-13
Figure 6- 14: Lateral Sector boundaries and crossing routes.......................................C-6-14
Figure 6- 15: Vertical Sector boundaries and crossing routes ......................................C-6-14
Figure 6- 16: Sector configuration and Runway in Use (I) ............................................C-6-15
Figure 6- 17: Sector Configuration & Runway in ise (ii) ................................................C-6-15

ATTACHMENTS
C.6-1: Sample Sector Options and Evolution
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This chapter presents Design Guidelines for Structures and Sectors. They are intended to support creation of the design concept for for a specific Terminal Airspace. This design concept would be based on certain assumptions. The design of Structures and Sectors follows the design of Routes and Holds (previous chapter). Given the phased approach described in Chapters 4 and 5, constraints and enablers for Structure and Sectors are identified in a phased manner as described in 6.4.1, below. As with Routes and Holds, the structures and sectors need to be subjected to a qualitative assessment against the selected safety and performance criteria as well as the Reference Scenario, if appropriate.

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Given the generic meaning to be attributed to Terminal Airspace (Part A, Chapter 1) and that the controlled airspace surrounding an airport can be designated in various ways in accordance to ICAO, the Guidelines for Terminal Airspace structures are slightly less specific than those pertaining to Routes, Holding patterns – and sectors.
Comment: In practice, many designers give little attention to the shape of the Terminal Airspace structure. Indeed, many designers are disposed to the idea that the shape and size of the Terminal Airspace structure is fixed and cannot be changed. This point of view is difficult to defend, particularly when one consider the purpose of the (controlled) airspace structure i.e. the protection of IFR flight paths.
　
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