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DOCUMENT TITLE: HELICOPTER OPERATIONS INSTRUCTIONSANDGUIDELINES
DOCUMENT INDEX: DRAFT
SIGNATURE LEGEND:
ID: NAME: TITLE:JG Joe Glass General Manager Marine Operations
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
Revision Date: DRAFT Ownership: MR
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REVISION HISTORY
Date Section Details of Revision
6th March 05 Suggested Revisions/clarificatons to this procedure are highlighted in Blue Fonts.Patrick Reilly
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
Revision Date: DRAFT Ownership: MR
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TABLEOF CONTENTS
1.0 HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
1.1 PURPOSEAND SCOPE
1.2 RESPONSIBILITIES
1.3 REFERENCES
1.4 DEFINITIONS
1.5 INSTRUCTIONS1.5.1 H.L.O or Person in Charge of Helideck Team
1.5.1.1 General1.5.1.2 Helicopter Landing Checklist1.5.1.3 Responsibility and Duty After landing (Rotors Running)1.5.1.4 Responsibility and Duties Prior to and During Take Off1.5.1.5 Grounded Conditions
1.5.1.6 Starting Up Instructions1.5.1.7 Safe Helideck Procedures
1.5.2 Firemen1.5.2.1 Instructions forHeliguard Fireteam1.5.2.2 Helicopter Landing Procedures1.5.2.3 Responsibility and Duty During Helicopter Take Off1.5.2.4 Instruction in Case of Fire
1.5.3 Radio Operator
1.5.3.1 General1.5.3.2 Landing and Take Off1.5.3.3 Emergency Situation
1.5.4 Helicopter Crash on Deck1 5 4 1 Considerations
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
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TABLEOF CONTENTS (CONTD)
1.5.5 Helicopter Crash in Vicinity1.5.5.1 Considerations1.5.5.2 Responsibilities1.5.5.3 Procedure
Designated Person in Charge of Helicopter Landing Deck H.L.O.On Duty OfficerRadio Operator (normally OOW)
Deck Watch the Heliguard team1.5.6 Notifications Procedures1.5.7 Helicopter Overdue1.5.8 Emergency Exits1.5.9 Rescue Operations1.5.10 Advice to Pilots and Charterers
1.5.10.1 Safe Operations of Helicopters1.5.10.2 Pre-Arrival1.5.10.3 Arrival
1.5.11 Protocol Matrix1.5.12 Helideck Capability Matrix
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
Revision Date: DRAFT Ownership: MR
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1.0 HELICOPTER OPERATIONS GUIDELINES
1.1 PURPOSEAND SCOPE
The purpose of the following instruction is to establish standardized responsibilities andactivities for helicopter operations. This procedure covers all Company vessels withhelicopter landing decks.
1.2 RESPONSIBILITIES
The Master, via the appointed person in charge of the helideck team, H.L.O,. has thedirect overall responsibility for all helicopter operations onboard.
The MasterHLO is responsible for all operations, which are conducted on the helideck. Hewill be specifically responsible for ensuring the following:a) That all personnel are aware that the helideck must be cleared prior to take-off and
landing (of both people and objects).
b) That all the required equipment is in position and in full working condition (safetyequipment, lighting, rescue and fire fighting equipment).c) That all personnel involved with the operation of the helideck are proficient in the
operational requirements. This includes both normal and emergency conditions.d) That passengers are correctly controlled during embarkation and disembarkation. The
responsible person will be responsible for ensuring the safe disembarkation andembarkation of all personnel travelling in the helicopters as well as ensuring that safeconditions exist on the helideck before, during and after both take off and landing.
e) The vessel may operate in areas where local or national rules apply, these must be
followed.f) The vessel charterer may have additional requirements, which he should make known
to vessel.
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
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1.5 INSTRUCTIONS
1.5.1 Person in Charge of the Helideck Team H.L.O.
1.5.1.1 General
The responsible person HLO is to ensure that:a) Prior to landing and take-off the helicopter deck is free from all loose articles and
anything that may catch the rotors.b) All warning and signal lighting is on and working. Floodlights are to be checked
prior to landing and to be turned on only by request of the pilot.c) All non-authorized personnel are kept well away from the helideck before
landing and until the helideck is clear.d) No smoking on the helideck.e) Crane operations are terminated before landing and until the helicopter is clear
of the vessel.f) Fire fighting Heliguard team is ready and dressed with properclothing and
equipment as required.g) Safety nets are checked and safely secured with proper tension.
Cargo and passenger manifests are duly in order and available to be handed over tothe pilot.
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
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Advise cranes to stop work and park booms clear of the 210-degree
sector. If the vessel is working alongside an installation, platform cranes mayalso have to be stopped. This is achieved by contacting the platform radiooperator. In the case of helicopter movements to an adjacent platform, vesselcrane movements are required to cease and booms parked clear of flight paths.
Restrict access to helideck and advise non-authorized personnel to leavethe area.
Unlock and check the safety equipment box.
Advise fire crew to standby.
Ensure standby vessel (if available) has been informed of helicopter.
Ensure that the Engineroom control room is informed.Immediately before landing, the H.L.O. will make the following checks:
Confirm that cranes have stopped work and booms are clear.
Ensure that helideck fire crew is dressed and in place.
Ensure that helideck is clear of non-authorized personnel.
No smoking on the helideck.
Inform the O.C.C. and Engineroom control room
Ensure that the fire pump is running if no start is close to the helideck.
1.5.1.3 Responsibilities and Duties After Landing (Rotors Running)
After the helicopter has landed and the anti-collision light has been switched off, theH.L.O. will ensure that no personnel are allowed to approach the helicopter untilinstructed to do so. The H.L.O. is responsible for the followingtasks :-
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
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All outgoing passengers will be loaded and checked against the
manifest. Freight and baggage will be loaded and checked against the manifest.
The flight crew will supervise the loading to ensure that it complies with theregulations and that all items are safely stowed.
Certain goods, classified as dangerous, are not allowed to be carried byhelicopters. The Administrator, or appointed person, as directedby the Master, will conduct a Security Baggage Search toensure thefollowing items are not carried. Goods classified as
dangerous include: Alcohol
Compressed gases
Fire-arms
Corrosive liquids (including mercury)
Offensive weapons
Magnetic material
Matches
Oxidising materials Lighters
Poisons
Drugs (unless prescribed by a doctor)
Flammable liquids
Noxious irritating substances
Polymerizable materials
Radioactive materials
Any articles possessing other inherent characteristics, which make themunsuitable for carriage by air, unless correctly packed.
When the helicopter is ready for take off, the H.L.O. will ensure that all the
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
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Standby in view of the pilot outside the helicopter cockpit, clear of the
rotors. On request by the pilots to start No.1 or No.2 engine (one or two fingers up) to
carefully observe the engine during start-up.
On the request by the pilot to start the other engine (one or two fingers up), tocarefully observe the engine start-up.
In start up conditions the rotors may dip towards the deck more than in constantrunning and this is to be guarded against.
After rotor engagement, move to right hand side of helicopter cockpit and
standby. After departure of the aircraft the H.L.O.will inform the O.C.C. OOW
and Engineroom control.
The H.L.O. will dismiss the Heliguard crew after the pilots giveclearance.
1.5.1.7 Safe Helideck Procedures
If wind speeds exceed 45 knots (1 minute sustained) over the helideck, helicopteroperations should be carefully considered.
The H.L.O. has the authority to stop/suspend helicopter operations if he considersthe helideck to be unsafe for personnel.
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1.5.2.1 Instructions for Firemen
The Helideck Fire Crew will be fully trained in the operation of the fire fighting andemergency equipment.
During landing and take off the Firemen is are to be in a protected position adjacentto the helideck, but still to have full overview of the deck.
1.5.2.2 Helicopter Landing Procedure
A qualified H.L.O. will be appointed for landing and take off.
The appointed H.L.O. will be in command and will have an aeronauticalradio, to allow direct contact with the Helicopter Pilot and theO.C.C. OOW
The H.L.O. will be advised by the O.C.C. OOW of an expected helicopter
landing approximately ten thirty (see 1.5.1.2) minutes before the estimated time ofarrival. The Heli-crew will go to the helideck and put on the fire suits provided.
The H.L.O. will ensure that all appliances are in position and in a state of readinessfor operation if required.
When the helicopter is landing, the H.L.O. will pay particular attention to theengines to ensure that there is no fire. If a fire is apparent, the H.L.O. will inform
the Pilot. The Heliguard teamwill be dressed ready to proceed tofight any fire as directed.
If any other emergency should occur, such as a helicopter crash, the emergencyd ill b f ll d
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In case of a jet engine fire, warn the pilot immediately. After clearance from the
pilot, direct the CO2 fire extinguisher lance into the marked red and white fireextinguisher opening on the side of the engine.
In case of a fire on the flight deck or underneath the helicopter, warn the pilotimmediately and then start to fight the fire.
1.5.3 Radio Operator
NOTE: The Radio Operator is the bridge officer on watch.
1.5.3.1 General
The Radio Operator will be advised of the E.T.A. of all helicopters due to use thevessel helideck. This notification will normally be given at least one hour beforeE.T.A.
No helicopter will be allowed to land or take off unless radio communications have
been established with the field operations centre (where applicable).
The standby vessel must be informed of all helicopter movements.
1.5.3.2 Landing and Take Off
Th O O W ill d i th H L O d th M t h h i i f d f
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Document Title: HELICOPTER OPERATIONS INSTRUCTIONSAND GUIDELINES
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Temperature (degrees centigrade)
The O.O.W. will ensure that the H.L.O. and the helideck Fireteam is inposition on deck ten minutes before the E.T.A. and that the H.L.O.informshim via the aeronautical radio when the helideck is mannedand ready.
On the helicopter's approach to the vessel, the H.L.O. may if requestedprovide details of the return load, number of return passengers and time forthe ground stop (should be less than 20 minutes).
The H.L.O. and O.C.C. will remain available for constant communicationswith the Pilot throughout landing.
When the helicopter is preparing to take off, the H.L.O.will receive the allclear signal from the Pilot who will then give the all cleardirectly to the Pilot.
The H.L.O. will be in constant communication with the Pilot until the helicopteris clear of the vessel. Thereafter, the O.C.C. will maintain a listening watch onhelicopter UHF until the helicopter has established communication with the next
station. At departure, the Administrator/Clerk/Medicwill send a message to the
appropriate heliport stating:
Call-sign of helicopter
Time of departure
Estimated time of arrival
Number of persons onboard
1.5.3.3 Emergency Situation
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1.5.4.1 Considerations
Fires should be attacked from the windward side. Due to a high risk of re-ignition, acombination of dry powder and either water or foam should be used. Powder willextinguish flames; water will cool the object. A layer of foam will insulate objectsfrom the heat of the fire. Water spray in combination with foam will break down theflames. If the fire is too fierce to be extinguished with the available equipment, themaximum amount of water spray should be applied to cool surrounding objects.Special attention should be paid to high pressure cylinders and piping. Foamshould be applied to form a carpet around the wreck to prevent a fuel spill fire.
General extinguishing shipboard procedure:1. Initiate FIRE ALARM status, inform the O.C.C. OOW who will make
P.A.2. Prepare back-up Rescue Fire teams to assist Heliguard.3. Dry powder should immediately be applied at the maximum rate possible. This
will extinguish or retard the fire until more equipment is brought to bear.
4. Applying foam to the object and the immediate surrounding area shouldcommence as quickly as possible.
5. The use of water jets or spray directly onto the helicopter should only beconsidered if the combined use of powder and foam proves insufficient, as watermay break down the foam layer.
6. Water spray should be applied to cool surrounding objects.7. Establish and maintain contact with the bridge orO.C.C. (as applicable).8. Consideration should be given to maneuver the vessel to position the fire on the
downwind section of the vessel to blow the heat/flames away from additionalfuel.
9. A PA announcements should be made to have all non essential personnelmuster at an appropriate muster station.
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The Master has overall responsibility and co-ordinates all activities according to hisjudgment of the total situation. He will issue calls for outside assistance ifconsidered necessary and order auxiliary vessels in the area to appropriatepositions. In any event he is to inform the USCG or local authority if operatingoutside US waters in all circumstances. Delay in doing this has proved, in the pastto have cost lives.
If notice of an intended emergency landing is received, the fire alarm is soundedand information on the situation passed on by the vessel public address (PA)system.
If diving bell is launched, abort the operations.
Fly off any helicopter on the deck and "hold off" incoming aircraft.
Check that the approach and overshoot areas are clear. Ascertain souls on board(SOB).
1.5.4.3 General Duties
H.L.O. observing crash or other incidents during landing or taking-off which arethat is, or may develop into, an emergency situation, will immediately inform theOOW and man the main extinguishing equipment.
Chief Officer
Discontinues all ongoing operations Directs Back-up squad to put on entry suits, B.A. and prepare for
rescue operation.
Directs the preparation of foam and dry powder extinguishing system,
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Prepares to assist in rescue and fire fighting operations in consultation
with the Master. Deploys assigned teams to shut down ventilation and close doors,
hatches and flaps in air inlets not affecting the maintenance of power.
Directs the elimination of ignition sources in the hazardous areas.
Organizes protection of vital arrangements in consultation with theMaster.
Helicopter Landing Officer in Charge of Helicopter Landing Deck Supervises damage control operations on helicopter landing deck by:
Initiating an immediate evacuation of all personnel from the wrecked helicopter.
Directing measures to prevent ignition of fuel spills.
In case of fire, directing a massive attack upon the fire. In case of fireimmediately call the bridge OOW (or DP control center as applicable) over theradio.
Directing rescue team to appropriate approach for evacuating operation.
Establishing protection and cover for rescue team. Establishing safeguarding of the area surrounding the wreck.
Seeing that injured people are brought to a safe position and given first aidtreatment.
Keeping Master informed of the development.
Diving Supervisor
Abort diving operations.
Recovers bell. Prepares divers for hyperbaric evacuation if required. (Check
with the bridge or DP control center).
Assemble surface divers (if available) for rescue
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In the situation of an actual crash landing on the helicopter landing deck, the
Heliguard fireteam should: If no fire is apparent, but there is a fuel spill, cover the spill
with a foam blanket to prevent ignition.
Ensure a fire watch is maintained, particularly for escaping fuel, which may runto lower decks.
Passenger Rescue
The doors and hatches on helicopters are of simple construction and are
unlikely to be jammed. If they are jammed, prise them open. If forcible entry is necessary cut only at recognized break in points such as
emergency exits and windows. If a helicopter is lying on its side, support theoccupants carefully when seat harnesses are released (single seat belts areused for passengers).
Flight Deck RescueThere are emergency exits on the flight deck. If perspex panels have to be brokento gain access, spray them with CO from extinguisher (this will make them brittle)
and then tap sharply with a fireman's axe. The pilot has a four point inertia reel typeseat harness. If he has to be released, undo it by operating the normal releasemechanism.
Stopping the Aircrafts EngineWhen the helicopter is in the normal position and the pilot and/or crew areincapacitated and the engine and rotors are still running:
Either : Stop the engine by spraying CO/dry powder/water into the air intake.
Although the engine is stopped the rotor blades will continue to rotate for a shorttime.
Or : Gain access to the cockpit. Close down the engines by shutting off fuel andbatteries. Fuel: pull both T - handles, shut down fuel cocks. Batteries: switch
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The shorter throw of secondary fire fighting agents (CO2, Dry Powder) is more
advantageous (owing to the close proximity of the cabin, engines and fueltanks).
Another significant feature is that a helicopter takes off and lands without forwardspeed, so generally speaking there is less disruptive damage to a helicopter and theoccupants are more likely to survive.
1.5.4.5 Radio Operator (normally OOW)
Upon notification of a helicopter crash, contact local air traffic control and informthem of the situation and establish communication with the shore base for handlingmessages. In case the radio equipment cannot be operated or the radio station hasto be evacuated, call the Master for further orders. Obtain possible VHF radio andestablish contact with the stand-by boat for the relay of messages.
1.5.4.6 Officer of the Watch (OOW)
The OOW should: Instigates diver "red alert".
Go to yellow alert for well intervention operations.
Makes a PA announcement advising all personnel of the situation.
Informs the stand-by boat (if available).
Informs the platform OIM if vessel is within the 500 metre zone.
1.5.4.7 All Personnel
In case of an emergency situation on the helicopter landing deck there will be a PAannouncement. Fire Team reports to Fire Station. Two members don fire entrysuits, the remaining members put on protective garments and assist.
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request assistance from all vessels in the vicinity to the best advantage of the
operations. Helicopters in the area will be called upon to approach the site of theaccident and relay the first situation report to all parties preparing rescue efforts andalso make the first rescue attempts if the situation permits. The Master will issuecalls for other outside assistance, also notify USCG (or other local authority ifoutside US waters) and keep them informed of the proceedings and act asCommander on scene.
1.5.5.3 Procedure
Anyone observing a helicopter downing, shall immediately inform the bridge (or DPcontrol centre as appropriate) about the situation.
Helicopter Landing Officer in Charge of Helicopter Landing Deck
Contact Master for determination of mode of action.
Abort any diving operations in progress. Request diving team to prepare surface
divers for search operations. In case decision to launch Lifeboat is reached:
Join lifeboat crew, check equipment and communications and getwaterborne.
Maintain contact with the Pilot on the aeronautical radiofor any advice or instructions, if the aircraft is still afloat.
Approach the wreck and direct rescue operations by VHF. Survivors shouldbe transferred to the nearest vessel, with Medical facilities.
On Duty OfficerOn information of helicopter ditch, announce by PA system that helicopter hasditched and also other known particulars of the situation. If diving bell is launched,
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1.5.6 Notification Procedures
Having informed the USCG (or appropriate local authority) and the local platform based airtraffic control, the Master should immediately inform the shore based EmergencyResponse Team.
Shore base will inform:
Owner/operator of helicopter (if known).
Other helicopter companies. Department of Transport Air Accident Investigation Branch (AAIB).
Police
Company Doctor (who will in turn alert hospital facilities as necessary).
Customs and Excise (for rapid clearance of personnel and services needed duringemergency action).
Immigration Department.
Information to be reported should include:
Helicopter type and call sign (if known).
Number of personnel on board.
Name of vessel or installation
Position of crash in relation to vessel or installation.
Description of incident.
Time of incident.
Details of any known injuries (names of injured persons not to be given over 'open'communications).
Weather conditions on scene.
Actions taken on the scene.
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If the helicopter is definitely known to have crashed and no message has been sent orreceived, a May Day situation should be declared and messages sent to the coastal and airradio station.
Depending on the situation, where and how the helicopter has crashed or crash landed, theunits directly involved shall immediately give all possible assistance.
Even in moderate waves, helicopters will most likely capsize, but will stay afloat for hours ifimpact does not burst open the fuselage. The cabin will gradually be flooded. Aftercapsizing, the emergency exit doors cannot be removed until water pressure is equalized.On most helicopters, pop out floats are mounted on the lower part of the fuselage or frame.The floats will inflate on immersion. Fuel tanks, located in the lower part of the fuselage,may be leaking.
1.5.8 Emergency Exits
Special attention should be paid to the wide doors on the helicopter, as victims may have
inflated their lifejackets in addition to wearing bulky survival suits and may have difficultiesto get out.
1.5.9 Rescue Operations
Rescue operations should be carried out from small boats to avoid puncturing floats anddealing severe blows to the wreck. Do not make attempts to perforate the fuselage to getaccess to the cabin; the widest door should be the prime target in making access. If diversare available, they should enter the cabin to assist survivors in escaping. Survivors shouldbe transferred to rafts until rescue operations are completed. Severely injured personsshould be evacuated immediately after receiving first aid treatment.
If required the vessel should cease diving operations in a safe manner and give direct
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1.5.10.2 Pre Arrival
The helicopter is to contact the O.O.W. on the agreed channel/frequency; thisshould be at an interval as long as possible prior to landing and at least 30 minutesprior to the estimated time of arrival (ETA). 123.05 MhzThe Pilot shall make his ETA known and after discussion with the O.O.W. in theO.C.C. the Pilot will let the vessel know his requirements regarding vessellocation, heading and speed.
1.5.10.3 Arrival
The Pilot should contact the H.L.O. to ask for a GREEN DECKto ensurethat the vessel is ready to receive the helicopter and get permission to land.The pilot shall contact the HLO to ask for a green deck and to get permission toland. This will verify that the vessel is ready to receive the helicopter.
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arrival at the vessel to request a
green deck. At this time, the pilot willbe requested to call once more 5minutes prior to arrival. At this time,the pilot should be given a greendeck
Frequency 123.05.
Crane operators will be called andadvised of the imminent arrival of thehelicopter. Cranes will remainstationary during the final approachof the helicopter
Crane Operators should adhere to helicoptersafety as per EHS Section 8.14.4 CraneOperations.
Green deck can only be declaredby the HLO after the deck has beenwalked. If the vessel doesnt have anHLO, then an officershall beappointed by the Master. The pilotshould receive the green deck on thecall 5 minutes prior to arrival.
No landings may occur without thepilot acknowledging green deckstatus from the HLO. Violations willresult in complaints being filed withthe safety department of thecompany chartering the helicopter,the helicopter company, and the FAA
Due to the extreme hazard to personnelshould all protocol not be followed, violationswill result in complaints being filed with thesafety department of the company charteringthe helicopter, the helicopter company, andthe FAA.
No landings may occur withoutthe pilot acknowledging greendeck status, from the H.L.O.
Due to the extreme hazard to personnelshould all protocol not be followed,violations will result in complaints being
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1.5.12 Helideck Capability Matrix
UNCLE JOHN WITCH QUEEN MYSTIC VIKING ECLIPSE Q-4000
I
A 22.2m 28' x 29' 64 feet/19.5M 22.2m 31'
B Octagonal Square Octagonal Octagonol Octaganol
SHELF (width): no no no no no
NET ONLY: 1500mm 5' 6" 3 feet yes yes
METAL: Steel Steel Aluminium Steel Steel
WOOD: no no no no no
ANTI-SKID: yes yes yes yes yes
E PERIMETER LIGHTS: YES-NO yes yes yes yes yes
II
Anone None fwd Mast/railings perimeter lights none
B
none
Photo-senstivive
switch for lights
railings and fire
ext.
heli-control,
mast, funnels
Foam monitors (Port
37',Aft 46'), Both Flood
lights, Fwd. handrail,
Tugger pedestal(48').
C
none
Bridge front,
approx 40 feet
away. Superstructure as above
Foam monitors (Port37',Aft 46'), Both Flood
lights, Fwd. handrail,
Tugger pedistal(48').
DESIGN: S61N Bell 206 Bell 212 S61N S-61N
WEIGHT: 9,298 Kg 6,000 lb 5,060 KG 9.3t 20,500 lbs
IV
3 x Foam
Monitor yes yes yes yes
V CRANE LIGHTING AND MARKING Cranes which can reach within 50 feet of the centre of the helideck, or interfere with approach/departure paths:
A ROTATING BEACON/STROBE LIGHT: YES-NO No N/A no no no
BHIGH VISIBILITY PAINT ON BOOM TIP, BALL &
HOOKYES-NO yes N/A yes no yes
VI WIND SOCK/VANE: YES-NO yes yes yes yes yes
VIIyes Yes yes yes yes
VIIIyes yes yes yes yes
IX HELICOPTER REFUELING SYSTEM: YES-NO no no no no no
XFixed & Hand
held Aero Radio Airband VHF vhf,hf,fm,phone VHF, air-radio
vhf, mf, hf, aero radio,
phone
PERSON: Master Master Master Master Master
CONTACT No. : 281-618-0509 281-618-0562 281-618-0566 281-618-0564 281-618-0573
C
COMMUNICATIONS (list aeronautical communication radios: VHF, HF,
FM or telephone):
DESCRIPTION
HELIDECK SIZE (diameter?):
HELIDECK SHAPE (octaganol/circular?):
SAFETY APRON:
VESSEL NAME:
HELICOPTER OBSTRUCTIONS:
III
HELIDECK FIRE-FIGHTING EQUIPMENT:
Skid obstructions (list any object extending above the level of the deck
surface up to 6 inches high).
Tail rotor obstructions (list any object extending above the level of the
deck between 6 inches to four feet high within 50 feet of the centre of
the landing area).
Main rotor obstructions (list any object extending above the level of the
deck four feet high or greater within 50 feet of the centre of the landing
area).
MAXIMUM DESIGN HELICOPTER WEIGHT LIMITS:
DECK SURFACE:D
VESSEL CONTACT:XI
WEATHER EQUIPMENT (wind speed/direction, barometer etc):
INSTRUMENTATION (for determining pitch, roll, heave etc):
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It is the responsibility of the user to confirm latest version of this document on the Master Document Index.