A visual docking guidance system shall be provided when it is intended to indicate, by a visual aid, the precise positioning of an aircraft on an aircraft stand and other alternative means, such as marshallers, are not practicable.
Note. The factors to be considered in evaluating the need for a visual docking guidance system are in particular: the number and type(s) of aircraft using the aircraft stand, weather conditions, space available on the apron and the precision required for manoeuvring into the parking position due to aircraft servicing installation, passenger loading bridges, etc. See the Aerodrome Design Manual, Part 4 — Visual Aids for guidance on the selection of suitable systems.
Characteristics
The system shall provide both azimuth and stopping guidance.
The azimuth guidance unit and the stopping position indicator shall be adequate for use in all weather, visibility, background lighting and pavement conditions for which the system is intended both by day and night, but shall not dazzle the pilot.
Note. Care is required in both the design and on-site installation of the system to ensure that reflection of sunlight, or other light in the vicinity, does not degrade the clarity and conspicuity of the visual cues provided by the system.
The azimuth guidance unit and the stopping position indicator shall be of a design such that:
a) a clear indication of malfunction of either or both is available to the pilot; and
b) they can be turned off.
The azimuth guidance unit and the stopping position indicator shall be located in such a way that there is continuity of guidance between the aircraft stand markings, the aircraft stand manoeuvring guidance lights, if present, and the visual docking guidance system.
The accuracy of the system shall be adequate for the type of loading bridge and fixed aircraft servicing installations with which it is to be used.
Recommendation. The system should be usable by all types of aircraft for which the aircraft stand is intended, preferably without selective operation.
If selective operation is required to prepare the system for use by a particular type of aircraft, then the system shall provide an identification of the selected aircraft type to both the pilot and the system operator as a means of ensuring that the system has been set properly.
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