It should be noted that individual bird exclusion devices are reported to have only low to moderate success on most installations. Combined systems have been more successful.
11.11.2 Main References
1.
Operations Notice No: 39 - Guidance on identification of offshore installations, Issued by HSE OSD December 1997. [Ref: 26].
2.
Bird Guano Infestations and Their Effect On Offshore Helicopter Operations [Ref: 31].
3.
A Review of Wrong Deck Landings, Status Lamps and Signalling Devices (HSE Task No: B\0015) - Issued by BOMEL Consortium June 1999. [Ref: 32].
11.11.3 Design Considerations
Installing specialised equipment onto NUIs is generally a requirement to combat the problem of sea birds on helidecks. When the equipment is fitted it also needs to be maintained.
There are three classes of mitigation systems that can be used for dealing with the bird problem - proofing, scaring and control.
Control (culling) is not a realistic option in the offshore environment and would also be publicly unacceptable.
Proofing is used but this is generally limited to fitting bird spikes on the perimeter lighting. The offshore industry has generally accepted bird scaring as the principal means of dealing with the problem.
Audio bird scaring systems are the most commonly employed devices and these reproduce bird distress and predator calls through loudspeaker systems, controlled by microprocessor to randomise various characteristics of the sound. Such an arrangement produces ‘a constantly changing audible hostile environment’ which, although disliked by the birds, is harmless to them. The effect of bird decoys - static models of predators - is very short-lived. However, where they can be installed, water-spray systems have been found effective but require constant surveillance and system activation from a remote location to control the problem.
Current methods have only partially solved the bird / guano problem offshore therefore, the search for new and innovative methods of exclusion should continue.
11.12 SAFETY SIGNS AND POSTERS
11.12.1 Introduction
A proliferation of random, irrelevant or ill conceived safety signs and posters on and around the helideck and in heli-admin will serve little purpose. A complete lack of good signs and posters is equally as bad. Getting the balance right should be the primary aim.
NOTE: On helideck inspections safety and emergency notices are generally found to be missing, inadequate or damaged.
Essentially there are two objectives for having helideck signs and posters. They are:
.
To clearly inform embarking passengers of the potential dangers and to give specific instructions during helideck operations
.
To provide safety and general instructions to all personnel, including the helideck crew.
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