.
Vessels with forward helidecks will sometimes offer a very good escape route to protected areas behind the bridge. The designer should take advantage of this option.
9.8.5 Platforms
.
Where possible, monitor / access platforms should be designed to provide protection for the helideck crew during aircraft movements
.
Ensure monitor / access platforms are big enough for fire equipment and passenger access without impeding helideck crew working areas, and without exceeding the requirements for unobstructed falling 5:1 gradient as stated in CAP 437
.
To assist with safe passenger movements, provide collapsible handrails at the head of steps onto the helideck. The design should be kept simple and robust. See Figures 9.7 and 9.8
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Ensure that monitor / access platforms are well lit.
(Photo courtesy of John Burt Associates Limited)
(Photo courtesy of John Burt Associates Limited)
9.8.6 Walkways
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Walkways should be designed to provide maximum protection for helideck crew and passengers
.
The design of access and escape routes should be to a recognised specification to ensure sufficient walkway width, ease of movement between different levels and to provide adequate personnel protection
.
Where possible, the primary access route from heli-admin should be made as wide as possible (say 1.5 metres) to allow for easier baggage, stretcher and freight handling
.
Wherever possible provide high sided, protected walkways to and from the helideck to assist personnel during adverse weather. Standard height handrailing is acceptable in benign weather conditions, but may not provide additional security for passengers in high wind conditions.
9.8.7 Stairways and Ladders
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The primary helideck access stairways should be designed with extra width where possible
.
All stairways and ladders should be designed in accordance with a recognised specification (See Section 9.7)
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Long, very steep stairways should be avoided. It is preferable to have intermediate landings
.
The head of stairways onto the helideck should be provided with folding handrails
.
Ladders for normal access are unacceptable
.
Similar to walkways, where possible, stairways should have highsided handrail systems particularly where the outboard helideck access routes are likely to be exposed to high winds and on vessels subject to wave motions.
9.8.8 Control of Personnel Access to Helideck
Designers should provide a means to restrict unauthorised or inadvertent entry to the helideck. The system used should not be a permanent barrier so as not to impede or prevent personnel escape from the helideck in an emergency.
A simple frangible chain (plastic) with a notice suspended in the centre stating ‘Access Prohibited unless Authorised by HLO’ will suffice. One end should be permanently secured, with a hook allowing easy removal at the other end.
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