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5.7 Offshore helicopter life jackets & aircraft homing devices
Crew life jackets should be of constant-wear type, fitted with a homing device transmitting on the appropriate international and/or national aeronautical distress frequencies in areas where suitable air and/or sea-borne homing equipment is available to Search & Rescue Services. In areas where such services are unreliable or nonexistent, management should consider the provision of homing equip-ment in contract aircraft. Such a decision should be taken in the context of the Aviation Safety Case.
5.8 Rotors Running Refuelling (RRRF)/helicopter rapid refuelling
Rotors running refuelling may be authorised for both on and offshore operations. However, local management should be aware of the additional risks involved and seek the OGP Member’s Aviation Advisor advice, giving sufficient notice for comment or to render practical assistance.
If it is an operational requirement to carry out rotors running refuelling the operator shall ensure that there are written procedures and stipulate that all staff involved have formal training. The risks may be further minimised by using pressure (closed system) refuelling.
More detailed guidance is provided in Section 7.5 of this guide.
5.9 Crane-helicopter operational procedures
When helicopters are approaching, manoeuvring, taking off or running on the helideck, cranes are to be shut down, with the crane operator vacating the cab.
5.10 Radio silence – perforating operations
5.10.1 Nature of hazard
To enable explosive operations to proceed safely and reduce disruption to other operations, it is essential to identify and minimise all significant potential sources of stray currents and voltages. This comprises perforating, sidewall sampling, formation interval testing, explosive cutting and explosive backing off.
5.10.2 Radio silence
Radio Silence not limited to telecommunications, but extended to cover all precautions taken to reduce or eliminate potential sources of stray currents and radio induced voltages.
The area in which transmissions are controlled will include all vessels and helicopters within 500 metres (1640 ft) of the installation.
Radio Silence will commence during the preparation of explosives and continue until the explosive device is more than 75 metres (250 ft) below the seabed. During this period no helicopter is permit-ted to operate within the 500-metre zone. “Receive only” radios can also remain in operation during radio silence.
5.11 Specialist roles
5.11.1 Land seismic operations
Only approved helicopter types, operated by Contractors approved by the OGP Member’s Aviation Advisor, shall be used in support of seismic operations. In general, where a safe forced landing cannot be reasonably achieved, twin-engine types should be used. However, it is recognised that for certain high altitude operations particular single-engine types may be the safer option. In any event, further advice should be sought from the Aviation Advisor. Further guidance on seismic helicopter operations is to be found at Appendix 8
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飞机管理指导方针 Aircraft management guidelines(33)
