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Sub-systems contributing to safety-criticality may include:
Helideck Power
Helicopter firefighting Drainage
Escapeways Emergency Lighting
This list of items arises from the helideck function as a means for evacuating the installation / vessel in an emergency (where possible under certain defined scenarios). Also, failure of helideck safety systems (e.g. firefighting system) may prevent the on-board capability from limiting the effects of a helicopter accident on the helideck.
4.4.3 Performance Standards
Performance standards should be set by the Installation Operator, MODU or vessel owner to measure or assess the suitability and effectiveness of the helideck and to assure and verify that the helideck structure, systems and equipment are fit for purpose. Meeting the installation integrity requirements of DCR and PFEER performance standards also contribute to assuring the SCEs for the helideck.
In setting the performance standards to comply with offshore legislation, it should also be recognised that the requirements of CAP 437 must be met in order to obtain BHAB Helidecks clearance for routine flight operations. Therefore, CAP 437 should be used as the basis for setting the relevant SCE performance standards.
SCE performance standards do not cover the auditing of helideck operational aspects. These should be covered in the installation Safety Management System (SMS). However, they are equally important.
4.4.4 The Process
Having set the performance standards, independent and competent persons should be selected by the operator / owner to prepare, or be consulted on the verification scheme and to implement it. It is for the operator / owner to decide how this is to be achieved. The prime requirement of the verifying body is an adequate capability to assess the importance of defects.
‘Independent’ in this context may include employees of the installation operator, MODU or vessel owner, provided they have not been involved technically in the design and planning of the relevant parts of the installation and that their management lines should be separate from those whose work they are checking.
It is also important to ensure that the objectivity of those undertaking verification works is not compromised.
The scope and level of the verification scheme should define what parameters will be measured; equipment tested or designs reviewed. It should also define how these measurements will be undertaken. When, where and how often the performance standards will be measured or assessed during the life cycle should be specified.
There should also be a system for verifying that the performance standards have been achieved. The personnel carrying out routine inspection and testing and the personnel who will independently verify this work may cover this.
4.4.5 Helideck Design Appraisal
During development of a new helideck or the modification of an existing helideck, independent and competent person(s) should conduct a design appraisal and fabrication survey to verify that the helideck and its systems meet the specified performance standards (see CAP 437) and is ‘fit for purpose’ in respect of the following items, as a minimum:
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离岸直升机起落甲板设计指南 OFFSHORE HELIDECK DESIGN GUIDELINES 1(15)
