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For night flights, life jackets will be equipped with an integral light.
12.5.4 Exposure suits for offshore helicopter & float plane flights
Decision to use exposure suits
Immersion suits certified for use by the regulatory authority should be provided to crews and pas-sengers for helicopter over water operations in cold water hostile environments.
In the event that local regulatory controls do not address the issue of wearing exposure suits, all necessary details and requirements should be stipulated by the Company.
These requirements should be reviewed and a decision made prior to commencement of operations.
Several studies and regulatory documents providing information on estimated survival time based on water temperatures versus survival time in varying kinds of dress can be used as background material for making decisions on use of survival suits. These documents should be available from the OGP Member’s Aviation Adviser.
Exposure suit considerations
1) A detailed risk analysis should be completed when determining if survival suits should be worn.
2) Factors that should be considered in the analysis for exposure suits should include:
a) The availability and anticipated response time of Search & Rescue resources.
b) Realistic assumptions on search and/or rescue time should include:
c) Distance offshore.
d) Worst case visibility conditions.
e) Accuracy of aircraft navigation equipment.
f) Worst case sea conditions.
g) Time to hoist each occupant.
h) Potential for in sea assistance of occupants.
i) Dropping of survival equipment. (see also sub-paragraph m below)
j) Estimated survival time for clothing being worn.
k) The worst case scenario in terms of the most unfavourable location of a ditched aircraft and longest mobilization times for aircraft or vessels should be used when detailing minimum response times.
l) Additional equipment and personnel factors such as, helicopter winching limitations, rescue helicopter capacity, crew expertise, guaranteed availability, and all-weather capabilities of the rescue aircraft/vessels need also to be considered
m) Determination by local management that occupants can be rescued within the prescribed survival time.
n) Compatibility of life vests and rebreathing systems with exposure suits.
3) The following practical problems should also be considered.
a) In certain areas, prevailing sea currents may result in water temperatures being sufficiently cold to make use of survival suits prudent. But high ambient air temperatures, combined with low air circulation within the suit can cause debilitating fatigue in crew members and discomfort for passengers.
b) In such circumstances, efforts may be better directed at improving rescue response (vehicles, vessels or aircraft systems), and search capabilities rather than introducing survival suits.
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飞机管理指导方针 Aircraft management guidelines(68)
