离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 1(57)

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9.8 ACCESS AND ESCAPE
9.8.1 Introduction
Access to and from helidecks is a topic that requires proper and detailed consideration in order to avoid major problems arising during operations.  When planning access and escape systems for the helideck during design, it is imperative that the designer fully understands the global picture and takes into account a number of general considerations.
9.8.2 Main References
CAP 437, Chapter 3.
9.8.3 Access – General Considerations
Access considerations will need to take account of the helideck location relative to the accommodation areas or temporary refuge and whether the helideck is to be installed on:
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a fixed structure

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a mobile installation or FPSO

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a vessel.
Features to be considered in detail should include, but are not limited to:

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Limiting the steepness of accessways to assist safe personnel passage in high winds and where excessive motions are present

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Providing the most direct route for the primary access from the heli – admin office

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Being able to secure the helideck properly from un-authorised or inadvertent access during helideck operations, etc

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Provision of efficient passenger controls

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Sufficient space for, and ease of laying of, fire hoses

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Easy and unrestricted access to rescue equipment

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Easy stretcher access

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Easy access for freight handling

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Easy access for baggage handling

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Separation of passenger movement from refuelling operations

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Provision of good clearances from helicopter tail rotor position for deck crew and passengers

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The need to accommodate aircraft positioning in various wind directions

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The need to avoid infringement of the 5:1 obstacle protected surface.

9.8.4 Escape - General Considerations
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There should be minimum of two primary escape routes from the helideck and preferably three

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Escape routes should take into account fire monitor positioning and the likely effect of water blast impeding passenger escape

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Escape routes should be designed to direct passengers immediately away from the helicopter, in particular the tail rotor area

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Easy access and quick arrival at a place of safety below helideck level

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Positioning of escape routes so as not to impede rescue operations

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One escape route can be a ladder system if a platform and stairs proves to be an unworkable option

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Fireman and helideck crew escape from monitor platforms should access to the helideck be cut-off

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Vessels with helidecks on the foredeck may be unable to provide a tertiary escape other than via a hatch system to below deck.  The designer should therefore consider what happens if a stricken helicopter compromises the hatchway and attempt to provide alternative options for the tertiary escape
　
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