Because VFR flights usually hold over a visual reference point and the airspace required for VFR holding is generally much smaller than that required for IFR flights.
This Guideline H1 has two elements, both of which are integral parts of the whole – and related to Guideline R3.
. H1.1: TO THE EXTENT POSSIBLE, HOLDING PATTERNS SERVING A TERMINAL AIRSPACE SHOULD IDEALLY BE LOCATED EITHER AT AN ENTRY POINT OR GATE OR OUTSIDE THE TERMINAL AREA.
The reason for this is the same as that given for R3. This Guideline implies that holding patterns should not be located at Terminal Airspace exit points/gates or at the crossing point of Terminal Departure and Arrival Routes. (See Guidelines for Routes).
In contrast what this guideline suggests for IFR holding patterns, many designers find it useful to locate the VFR holding areas relatively close to the airport so as to facilitate the sequencing of VFR flights with IFR arrivals.
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H1.2: TO THE EXTENT POSSIBLE, THE LOCATION OF HOLDING PATTERNS SHOULD BE SUCH AS TO CREATE MINIMUM OPERATIONAL COMPLEXITY FOR BOTH EN ROUTE AND TERMINAL AIRSPACE AND FOR ADJACENT TERMINAL AIRSPACES.
Ideally, the location of holding patterns should strive to create minimum overall complexity for the entire air traffic system. This implies the need for a collaborative approach (between En Route and Terminal and between Terminal Airspaces) and making the necessary trade-offs when seeking to locate holding patterns.
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H1.3: TO THE EXTENT POSSIBLE, THE LOCATION OF HOLDING PATTERNS SHOULD REMAIN CONSTANT, IRRESPECTIVE OF THE RUNWAY IN USE.
This guideline supplements R3. The location of the holding patterns should not be affected by change to the runway in use.
This guideline is of particular importance as regards VFR holding areas, and should be applied to the extent possible.
H.1 R1.2 (Graph 5-1)
Edition: 2.0 Released Issue Page C-5-17 Amendment 1 – 17/01/05
Figure 5- 13: Application of H.1
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As far as practicable, Terminal Holding Areas should not be located in areas of known and/or frequent turbulent weather phenomena, so that they can be used when airport operations have been suspended due to adverse weather.. When the traffic mix is populated by a high-number of low performance aircraft, it may be useful to design separate Terminal Holding Areas to accommodate these aircraft. This can be advantageous as regards noise and simplify sequencing for ATC.
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本文链接地址：EUROCONTROL MANUAL FOR AIRSPACE PLANNING 2(47)
