离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 1(14)

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If the MODU or vessel helideck is to be used operationally on the UKCS there are potentially a number of conflicts likely to arise between UK and International requirements and Classification Society Rules, particularly where the MODU or vessel is designed and constructed outside the UK.  It is therefore the responsibility of the MODU or vessel owner to address and resolve all possible regulatory and code conflicts when writing the initial vessel specification if the helideck is intended to operate in UK waters without having severe operating restrictions imposed by BHAB Helidecks.
Design areas where conflicts in the requirements generally occur are:
.  
Helideck structural codes and passive fire protection (particularly if aluminium helideck structures are specified)

.  
Helideck size, allowable mass and obstruction criteria

.  
Helideck and installation / vessel markings

.  
Lighting systems

.
Firefighting system selection, capacities and coverage

.
Rescue equipment scales.

The above areas where potential MODU and vessel design and construction requirements may conflict are covered in more detail in Section 7.
4.4 VERIFICATION
4.4.1 Introduction
The Offshore Installations and Wells (Design and Construction, etc.) Regulations 1996 (SI 1996/913) – (DCR) have amended the Offshore Installations (Safety Case) Regulations 1992 (SI 1992/2885) – (SCR) to replace the Certification regime established by the, now revoked, Offshore Installations (Construction and Survey) Regulations 1974.
The Safety Case centred Regulations dispensed with the concept of a Certifying Authority and place sole responsibility for the development and ongoing maintenance of a safe Installation onto the Operator or Owner (Duty Holder).
It is recommended that vessel owners operating in UK waters adopt a similar approach to that described below where they have an operational helideck installed. There is close correlation between the fundamental requirements of classification and that of verification. There is also the basic requirement to comply with CAP 437.  For legal and practical reasons, therefore, it makes good sense to apply this design guidance to all helidecks.
4.4.2 Safety-Critical Elements
Operators / Owners are required to list the Safety-Critical Elements (SCEs), have them subject to independent review and develop a scheme for verification of their performance throughout the life cycle of the installation.
UKOOA Guidelines for the Management of Safety-Critical Elements [Ref: 51] provide further detailed information.
An Offshore Installation helideck is a collection of systems, some of which are safety-critical or have safety-critical sub-systems or components.  This means that a failure in any part of its operation could cause, or substantially contribute to, a major accident at the installation with potentially serious consequences for installation, helicopters and workforce.  
　
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