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11.8.7 NDB Equipment
The Non-Directional Beacon is a basic navigation aid used on the UKCS by offshore helicopters.
The HLO (or Radio Operator) switches on the equipment when requested to do so by the helicopter flight crew. This will probably be during an approach to the installation or vessel.
There may be a number of installations in an area with the NDBs operating on the same frequency, therefore switching arrangements and their location should be kept simple and easy to operate, to avoid spurious use.
Application for frequency allocation and equipment approval is required from ATSSD.
See Sections 11.8.3.1 and 11.8.3.2 for information about locating the equipment and aerials.
NOTE: During helideck inspections the use of single frequency NDB sets tuned to 410kHz has been noted. These are unacceptable to the ATSSD.
11.8.8 Public Address and Alarm Systems
An effective system of loudspeakers and telephones should be provided to ensure good communications in the helideck environs. The arrangements should comply with the requirements of PFEER Regulation 11.
Helideck public address and alarm systems are generally an extension of the platform or vessel general alarm and PA systems. The exception to this is the Status Light system specifically installed on helidecks to warn helicopter flight crews that it is unsafe to use the helideck. Details of the helideck Status Light system are given in Section 11.3.8.
11.8.8.1 Equipment Specification
The helideck PA and alarm system equipment is normally confined to extending the systems of platform PA speakers and telephone handsets to the helideck to ensure that adequate coverage is provided for raising alarms and for hearing platform alarm signals.
Platform alarm beacons / lights may also be installed to comply with the need for visual signals in high noise areas. However, this should no longer be necessary where the helideck is equipped with Status Lights.
The PA speakers are normally located on the access monitor platforms and on larger helidecks, additional speakers may be required in other locations (e.g. on access walkways) to achieve good coverage.
It may not always be considered appropriate to locate PA telephone handsets on the monitor / access platforms. Instead it may be preferable to locate them at access points to the helideck (e.g. base of stairways) to provide better general coverage and to place them in a less noisy environment.
11.8.9 Video Briefing System
Facilities for providing pre-flight briefings to helicopter passengers should be provided in the flight departure area or another suitable location. The screen should be located and positioned such that it can be easily viewed and the sound system should be adequate to ensure that the instructions given can be seen and heard by all persons in the briefing / departure area.
The equipment usually comprises a simple monitor screen and a remotely located
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离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 2(62)
