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8.2.4 Seeking the Safest and Most Efficient Helideck Design Options for Operations to NUIs
The helideck design for a NUI should adopt a similar approach to that used for a manned installation as noted in the general sections of these guidelines.
Design considerations that are specific to NUIs, that normally have minimal facilities, are detailed in the following sections.
8.2.4.1 Helideck Layout Considerations
If a helideck on a NUl is of a size which does not allow a second helicopter to land in the event that the first becomes unserviceable, or the helicopter is unable to be re-started whilst on deck, shutdown is not normally permitted.
If a crane is available on the installation that is capable of lifting an unserviceable helicopter onto the deck of a supply vessel, shutdown may be permitted.
Shutdown is permitted on helidecks that are of sufficient size to allow a second helicopter to land using the special procedures for operations to obstructed helidecks in the helicopter operator’s Operations Manual.
Helideck size should comply with the minimum requirements specified in CAP 437. BHAB Helidecks will not sanction operations to new-build helidecks that do not meet ‘D’ size minima. Additionally, the helideck should be designed to accommodate the weight of the heaviest helicopter intended to land on the installation.
8.2.5 Equipment Design Considerations
8.2.5.1 General
The following are specific design considerations that need to be addressed when specifying systems and equipment for NUIs. The listed topics are in addition to or supplement the more detailed requirements covered in the general sections of these guidelines.
8.2.5.2 Helicopter Start Unit
If helicopter shutdown is planned, external power start facilities should be provided. See Section 11.10.
8.2.5.3 Lighting (helideck perimeter, floodlighting, obstruction)
The design of helideck lighting systems is covered in Section 11.3.
8.2.5.3 Helideck Net
Under normal circumstances, helideck nets are required on NUIs.
However, if due to special circumstances, there is good reason why a particular helideck net should be removed this may be done, provided the helideck friction requirements specified in CAP 437 are fully complied with and it can be demonstrated that the helideck can be kept free of guano contamination.
8.2.5.4 Firefighting Equipment
The following equipment should be available on the installation.
1.
A dry powder fire extinguisher having a capacity of not less than 45kgs; and a carbon dioxide fire extinguisher with engine applicator having a capacity of not less than 22.5kgs
2.
Serious consideration should be given to the provision of a portable foam unit. Such a unit should be self-contained, with a minimum capacity of 90 litres and should be fitted with an aspirated branch.
Every effort should be made to select equipment that will require minimum maintenance.
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