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Alternatively, where a vessel is already equipped with a motion sensor as part of the basic vessel specification (e.g. dynamically positioned vessels) algorithms can be developed (to give a correction for the centre of the safe landing area) which can provide the same motion information.
11.9.10 Automatic Meteorological Instrument Station
The provision of an ‘on line’, fully automated and integrated meteorological instrument package should be seriously considered for offshore installations, particularly on floating installations
During operations, if a helicopter operator is able to obtain ‘on line’, full and accurate weather data combined with vessel motions, etc. for an installation or vessel, this can greatly assist with more accurate flight planning and establishing payloads.
It should also reduce the opportunity for expensive ‘overfly’ flights where landings have to be aborted on arrival at the installation due to the pilot encountering excessive helideck movements that are outside the limits prescribed in his company Operations Manual, thus preventing the execution of a safe landing.
11.9.11 Communications and Weather Equipment Power Supplies
Power supplies for the helicopter communications and weather equipment should be taken from the emergency switchboard, supported by an un-interruptible power source (UPS), where practicable.
11.10 MISCELLANEOUS HELIDECK EQUIPMENT
11.10.1 General
Where the helideck designer is required to specify miscellaneous helideck equipment, reference should be made to CAP 437 to establish the minimum requirements. Also, the UKOOA Guidelines for the Management of Offshore Helideck Operations [Ref: 49] provides details of the equipment, appropriate specifications and locations.
The installation operator, MODU or vessel owner should also be consulted because often they may wish to specify scales of miscellaneous equipment required specifically for their operations.
The equipment provided (where appropriate) will generally include the following items:
.
Aircraft Chocks
.
Tie-down Strops / Ropes
.
Scales for Baggage and Freight Weighing
.
Freight Loader
.
Helicopter Start Facility
.
First Aid Equipment
.
Helicopter Ground Handling Equipment
.
Landing Prohibited Marker
.
De-Icing Equipment.
All helideck miscellaneous equipment with electrical power sources should be specified in accordance with the installation hazardous area classification.
11.10.2 Helicopter and Helideck Washdown and Cleaning Equipment
A readily available supply of fresh water should be available at the helideck in order to washdown helicopters if they are doused with foam or seawater as a result of an inadvertent fire monitor discharge.
Helideck wash down is a routine activity carried out in order to maintain the helideck in a clean and serviceable condition. This activity is particularly important:
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