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The designated radio callsign must be the same as the helideck and installation / vessel identification markings. Callsign approval is also required.
11.8.2 Main References
CAP 437, Chapter 6.
11.8.3. Location of Equipment and Aerials
11.8.3.1 Equipment Location
Locations for the aeronautical communications and weather information control equipment can vary considerably depending on the designated command and control points of an installation or vessel. This may include locating the aeronautical communications in a purpose made radio room or helideck control cabin, the Central Control Room (CCR), on the Bridge of a vessel or in an area adjacent to heli-admin, etc.
Wherever it is decided to locate the aeronautical communications, they should ideally be grouped together in an ergonomic manner. This will allow the Radio Operator / HLO to effectively make contact with helicopter flight crews during flight to pass relevant information during helideck operations and to record routine communications (in the radio log). Background noise can seriously affect good radio communications, so providing a low noise area should be the objective.
Meteorological information is a key item during communications with offshore helicopter flight crews, therefore the communications equipment and weather station instrument indicators are best sited adjacent to each other, where practicable.
The use of a PC based system (e.g. Weather Windows) for recording and displaying the full range of meteorological measurements in a single package should be seriously considered, in order to provide good operating efficiency.
On floating structures and vessels it is important to include the motion recording equipment (whether PC based or analogue instrument system) into the basic design considerations for aeronautical communications. Similar to meteorological information, vessel motions are part of routine communications with flight crews and the information should be readily available at the aeronautical communications control point.
11.8.3.2 Aerials and Sensors
The siting of all types of communication aerials (usually ‘whip’ aerials) is often a source of problems for helicopter operations (e.g. causing infringements in obstruction free areas). The NDB aerial is often a ‘loop’ type and is strung around the perimeter structure of the helideck (See Section 9.11 for more details).
Finding suitable aerial locations for good equipment performance and access for maintenance can be difficult and areas around the helideck perimeter are often chosen as a matter of convenience, particularly where there is no purpose built radio tower on installations and floating structures. Vessels pose less of a problem because often there is a suitable platform on the bridge top.
It is imperative that helideck designers in conjunction with communications specialists plan the siting of aerials to ensure that they do not adversely impact helideck operations.
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离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 2(60)
