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Be connected to the emergency switchboard (preferably an UPS) and have adequate in-built redundancy to cater for individual lamp failures along with appropriate procedures i.e. monitoring systems, in place to mitigate partial or total system failure.
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Comply with helideck obstacle environment criteria.
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On normally unattended installations the system must be capable of being re-set from an adjacent manned platform or a manned shore location.
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Performance of status light units must have been verified using an approved test procedure (e.g. based on FAA AC 20-74) and been subjected to testing to validate the effective intensity of the flashing lights.
11.3.9.5 Equipment Specification
Development work has been undertaken by CAA to establish the standards to be used for specifying helideck status lights. A Technical Specification is available in CAA paper 2003/6 and CAP 437.
(Photo courtesy of Orga BV)
Figure 11.13a - Typical Helideck Status Light
(Photo courtesy of Orga BV)
Figure 11.13b – Typical Helideck Status Light (Repeater)
Designers should note that normally there should be at least two lights fixed on the helideck perimeter or at locations nearby. However, to ensure the warning signals can be seen from a helicopter from all approach directions, in some cases there may be a requirement to install more than two beacons.
11.3.9.6 Operational Requirements
When status lights are installed and operational on an installation or vessel, the operator or owner should provide relevant information (e.g., switching logic, etc.) to the BHAB Helidecks for notification (in the HLL) to all the helicopter operators and their flight crews.
11.4 ELECTRICAL POWER SUPPLIES
11.4.1 General Philosophy
The provision of electrical power to the various systems used on the helideck should fully take into account the requirement to keep the helideck operational at all times, day or night.
This is because the helideck is normally identified as a functional part of installation or vessel emergency preparedness and as such is a Safety Critical Element.
It is also very important to note that once a pilot has committed to land on an offshore helideck, any failure of a helideck system intended to provide visual cues
(e.g. helideck lighting) or safety information (e.g. installation to helicopter communications and status lights) will seriously compromise flight safety and potentially jeopardise a safe landing.
11.4.2 Design Considerations
NOTE: During helideck inspections it is generally found that the perimeter and floodlights are not connected to an UPS.
Often the lights are connected to the emergency generator / switchboard and that may take 15 to 45 seconds to come on line. Load transfer for these systems should be immediate.
It is recommended the ‘critical’ helideck electrical systems should be designed:
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