离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 1(44)

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8.1.4.2 Temporary Arrangements
Where fixed installations, floating structures (e.g. FPSOs and MODUs), Jack-Up Rigs and vessels are temporarily bridged together, linked by an offloading system (or other such mechanism) or are in close proximity to each other (1000 metres or less), a Safety Case is normally required to address changes to on-board processes and the management of operations, etc.
The Safety Case should reflect all physical aspects of the combined facilities (including interim layout changes, e.g. helidecks out of use, vessel relocations / movements, obstructions), their operations, management organisation and responsibilities and any procedural changes that will have potential impacts on helicopter operations.
This information should be passed to the Helicopter Operator / BHAB Helidecks in order for them to make an assessment of the extent and form of any operating restrictions or limitations that should be applied.  Flight Crews will use the information for flight planning and flight management purposes.

(Photograph courtesy of Shell Exploration & Production)
8.1.5  Management of Combined Operations Helidecks
During the management of combined operations the potential may exist for more than one helideck to be available.  Also, there is the possibility that a helideck(s) will be inaccessible due to the temporary physical arrangement of the facilities or activities taking place thereon.
The Field Operator in conjunction with other Duty Holder(s) and the Helicopter Operator should:
1.  
Initially decide which helideck(s) will be designated ‘Active’ or ‘Inactive’

2.  
If one or more helidecks will remain available, introduce a combined helideck management organisation in order to appoint the OIM, HLO and Radio Operator who shall act as co-ordinator for the combined operations helicopter activities

3.  
Agree any changes to normal operating procedures and, where appropriate, develop helideck management and emergency procedures that will properly accommodate safe helicopter operations during the temporary works

4.  
Make provisions for the correct marking of ‘Inactive’ helideck(s)

5.  
Where appropriate, undertake a full assessment of any potential effects from combined operations on the helicopter flying environment (e.g. adverse aerodynamic and thermal effects on flight paths, obstructions, crane operations, vessel movements, fugitive gas emissions, etc.)

6.  
Consider the possible effects on helideck management from increased helicopter movements and make suitable provisions to mitigate these effects. There may be increased passenger and freight flows through the designated heli-admin and increased number of refuels requiring greater fuel stocks to be held on board, etc.

8.2  NORMALLY UNATTENDED INSTALLATIONS
8.2.1  Introduction
NUIs are a unique type of facility that require considerable and proper thought when designing the installation for helicopter operations.
　
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