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Equally, remote sensors for meteorological instruments should not be sited where they may adversely impact helideck operations. Also, the environment around an offshore helideck during helicopter movements can seriously affect the operation and accuracy of remote sensors (anemometers in particular) as a result of the ‘rotor downwash’, so this should be fully taken into account.
11.8.4 Aeronautical VHF Radio
Two main VHF aeronautical radio sets are required on installations and vessels operating in the Central and Northern North Sea. Elsewhere on the UKCS a single main set may be acceptable.
The purpose of installing two VHF sets for the Central and Northern North Sea is to separate air and logistics communications flow onto separate frequencies, thus reducing interference and overloading the air traffic channel.
In the event of failure of either unit, the remaining set can be used for both purposes by switching frequencies.
Where only one main VHF set is required to meet the area requirements, it is prudent to consider installing a second, standby aeronautical VHF set. Failure of a single main unit can seriously limit helicopter operations.
The aeronautical band VHF radios should preferably have synthesised frequency control.
All VHF sets must be ATSSD approved.
See Section 11.9.11 for power supply specification.
11.8.5 Marine VHF Radio
All ships must carry a marine VHF installation (see SOLAS chapter IV). The purpose of providing a marine band radio is to provide communications between vessels at sea (e.g. Standby Vessel) and for helideck crews to communicate with crane operators in order to control their operation during helicopter movements around the installation or vessel and whilst helicopters are on the helideck.
The HLO and appropriate helideck crewmembers should have the means to communicate readily with crane operators and standby vessel crews, preferably using a headset.
See Sections 11.8.3.1 and 11.8.3.2 for information about locating the equipment and aerials.
11.8.6 Helideck Crew Portable VHF Sets
Portable VHF radios that can operate on aeronautical and marine band frequencies should be provided in sufficient numbers for the HLO and members of the helideck crew.
Operation of the radios should ideally be ‘hands free’; therefore a headset system is the preferred option.
During helideck operations the HLOs set will be used for both transmitting and receiving messages to flights crews, helideck crewmembers and the radio operator. To reduce unnecessary r/t traffic, the helideck crew sets should be used for ‘receive only’ unless it is necessary for a helideck crewmember to transmit a message whilst acting in a safety capacity.
The HLO and helideck crew portable VHF radios, spare batteries and the charging equipment should be kept in a safe storage area in heli-admin or the helideck control cabin (if provided).
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离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 2(61)
