ACOP Flashcards
What are ACOP,s
Approved codes of practice which are approved by the HSC ( health and safety commission) and gives advice on how to comply with the law.
Are they the actual regulations
No just a guide
Are these the same as IMCA,s
No
What are the regulations called
Diving at work regulations 1997 ( SI 1997 no 2776
When did they come into force
1st of April 1998
HSE memos on diving stopped when
When the DAW 1997 came into play
What are further HSE memos called
Diving information sheets ( DVIS )
How many regulations are there that cover diving at work
Five including this
In the guide what do the italics represent
The regulations
What does the bold text represent
The ACOP information
What does * mean next to text
That the technical guidance is listed in annex 5
If you comply with the regulations are you in line with the law
Not necessarily you may have other laws to consider
The regulations are set under what law
The health and safety work act 1974 ( the HSW act )
Who wrote the ACOP,s code
The IMCA reps working with the HSE
Where does this code apply
- On offshore installations and pipelines wells and mines which are in uk waters outside the 12 mile limit.
- On offshore installations and pipelines within the 12 mile limit.
- Where closed bell and saturation diving is done.
- When on DP
- All dives below 50m,s unless
A. Media diving projects
B. Recreational diving projects
C. Scientific and archeological diving projects
What is the 12 mile limit
A distance of 12 nautical miles from the lower water line
What are the other 4 codes that cover diving at work
- Commercial diving projects inland/inshore.
- Media diving projects
- Recreational diving projects
- Scientific and archeological diving projects
This code does not cover techniques to reduce risks so what does
AODC , IMCA , DVIS and DMAC guides
When referring to these guides what must you check
That they are up to date
A diver is classified as what
A person in water or liquid or in a chamber at a pressure of 100mb and breathes gas or air greater than atm pressure to survive.
Are clean rooms or submersible crafts at an internal pressure of 100mb above atm press covered by the diving regs
No
An activity made up of one or more diving operations from the time you start to prepare to the end of decompression or any therapeutic recompression or leaves the water plus the time he has to stay next to the chamber, is called what
A diving project
A dive or dives that can be safely supervised by one person is called what
A diving operation
Who has the main responsibility in a diving project
The diving contractor
A supervisor should not do a diving operation for what reasons
If he thinks it is unsafe or is too big for one man to run
What does the 1995 order refer to
The HSW act 1974
If you have had a diving accident and are in transit to a hospital or in a hospital ard you covered by the regulations
No
If you are in a hyperbaric chamber in a hospital do they cover you
No
If you are treated in a private hyperbaric chamber are you covered
No
Are people like Caisson workers who work in an air pressurized system covered
No
Can you have more than one diving contractor for the same project
No
What other people are responsible for the well being of persons in a dive team but not including the dive team
- The client
- The principle contractor
- The manager of the offshore installation
- A consultant for the client etc
- The master of the vessel
- The superintendent
Does the DP operator have to inform the dive supervisor before any moves
Yes
Name other persons who have a responsibility to you for safe working
Crane operator, maintainance persons and riggers
Can the client employ 10 independent self employed divers
Yes but it must be agreed in writing who is the designated diving contractor
When this is the case what must be done
- The name of the diving contractor to be entered in all project records.
- All other persons in the vicinity or Involved in the project notified in writing of the contractor
What must you provide HSE with before you act as a diving contractor
- Name address and tel no
- Legal status ( limited company etc )
- Name and address and no of contact if different from 1.
- Sig & full name of person supplying info.
- Date when info supplied
In the ACOP for commercial diving projects offshore it refers to the information in the previous question that it is in schedule 1. Where is this schedule
In the back of the diving at work regulations 1997. ( SI 1977 No2776)
Before a diving contractor starts a project he must produce what
A diving project plan it must be updated as necessary
Before the start of a diving operation within the plan what must be done
- Appoint a supervisor to run the operation.
- Supply that person as soon as possible with a letter of appointment.
- Supply that person with a copy of the project plan.
Who is responsible for ensuring a risk assessment is carried out
The diving contractor
In a risk assessment what must be taken into consideration
- It must identify site specific risks and hazards
- It must be reviewed at regular intervals.
- Risks assessed under the HSW regulations 1992 if not assessed under the diving regs
- Take in the risk to the public
The project plan in respect of the risk assessment must show what ?
C.G.R.I.D
- How they are controlled
- May have generic risk assessment
- Show the date of the assessment
- Show any instructions and planning
- Show a procedure for reviews
Contingency procedures for emergencies must be covered where
In the project plan
What is the max depth air or nitrox can be used in surface dive
50 meters
Is scuba covered by this code
No
List some of the problems with SCUBA
Limited gas supply, no comms, you have to monitor your own depth and time , you could get snagged and not have enough gas to get free
What other document states that you must not use SCUBA In offshore diving in support of oil/gas projects
Diving information sheet 3
What is the max time allowed on air at 100ft
50 mins
What is the maximum time allowed on air at 15 m,s
180 mins
What is the maximum PPO2 for surface dives
1.4 bar
What is the max bottom time at 50 m,s
20 mins
What is the max bottom time at 12 m,s
240 mins
When breathing a nitrox mix with a higher O2 content what must you use
Use an EAD table
What type of diving is done below 50 metres
Closed bell diving
When are mech isolations not required when diving near intakes and discharges
When protected by a suitable physical guard
How should you enforce diver safety
By a permit to work system
What is the maximum water current allowed at the immediate vicinity of the water intake point
1 knot
If a grill is fitted where should this 1 knot apply
To the surface of the grill
Where a grill is fitted what is the maximum opening allowed
400 square cm
How does marine growth affect this flow rate
It would increase it
With respect to fire intakes what are the two recommendations
A protective structure to ensure diver safety in the event of automatic start up and any such device be regular Inspected
Who can stop diving operations due to reduced visibility
The master , superintendent or supervisor
Most installations have an over-the side work rule governed by what
The ability for the standby vessel to able to see and recover a man from the water
At one knot what force would this apply to a standing diver
10kg
At 1.5 knots what force would this apply to a standing diver
23 kg
A surface diver working normally in mid-water can work in what current
0.8 knots
A surface diver doing light work on the bottom can work in what current
Up to 1 knot
A bell or wetbell diver working mid-water , doing light work can work in what current
Up to 1.2 knots
A bell/wetbell diver on the bottom doing light work can work in what current
Up to 1.5knots
What hazard can occur when working with ROV,s
Electrical entanglement, and physical impact
What safety measures can be employed
Reduced umbilical length and electrical isolation switches
ROV,s can have voltages up to what
3.3kv
An ROV,s thrusters must have what
Prop guards
If you have divers in the water can the ROV,s beacon or tracking device be used as a primary reference for DP
No
When does the diving supervisor have authority over the ROV supervisor
When a diving operation is under way
When can the ROV be recovered or deployed
Only with the authority of the diving supervisor and vessel master
All Rov operations must be coordinated through who
The diving supervisor
What is the maximum voltage allowed in DDC,s
24 v/dc
What are the operating parameters of RCD,s
30 mA at 20ms
On hand held equipment the fault current is limited to what
1 amp
What is the problem with battery charging in a confined space
You can get an explosion
What is the maximum battery size allowed in chambers
AA 1.5v and 500mA/hr
Give 3 items which are prohibited in the chamber with respect to batteries
- Rechargeable power tools
- Batteries containing toxic material
- Battery chargers
What is the max voltage for surface tools
110v
Before any electric item is taken into saturation who must it be cleared by
A category 3 or 4 person
When a water jet pump and equipment arrives onboard what do you check
That it has an in-date test has is less than 6 months
What is the max pressure required to hold the trigger on a water jet
1.35Nm or 12 lb/inches
What is the minimum lance length
60cm
How long must you monitor a diver after a water jet injury
4/5 days
What can you give a diver to give to his doctor after an injury
A plasticized card stating the pressure ( up to 14,000psi ) and velocity of the jet ( 900 mph ) and that unusual infections have come about from this type or injury in the past
How does HP water getting affect DP
The noise can affect the HPR system
At what pressure should enclosed lift bag relief valves lift
2 psi
What is the safety factor of a lift bag
5:1
What is the safety factor of the webbing
7:1
What should the list capacity be
Plus 0% and minus 5% of fresh water
On some occasions the actual lift is greater than stated by up to how much
20%
How often should lift bags be inspected and checked
Every 6 months
How often is it to be tested
Every 12 months to max safe working load
Why is the use of lift bags dangerous
Uncontrolled ascent or decent of a load
For lift bags of 3 Tonnes or above, what size should the inverter line be
25mm polypropylene
What should the line be for smaller bags
19mm polypropylene
What can happen with abrasive cutting discs what must you do to prevent it
The adhesive can degrade and the disk break in use , only dry disks not used in water before to be used , only send down what is required
U/W oxy arc cables should be insulated bit which is the most important
The negative
What is the most likely job to produce an explosion under water
Oxy-arc cutting in a confined space
What side cables should be used for underwater burning/ oxy-arc cutting
The supply cable ie( - amps) 75mm2
On the return side ( + Amps ) 70mm2
What can happen in the rod whilst the gun is energised
Hydrogen can be produced inside the rod
What must you do before making it hot
Flash the gun
What are the dangers of oxy arc cutting underwater
Shock , explosion and the trapping of divers after cutting an object free
Who can veto the start or terminate a diving operation
The master , the client or the diving supervisor
The DP operator must inform who of what
Relevant control centres of any changes in operations
Who is the only person that may order the start of a diving operation
The diving supervisor
How can procedural changes be recorded
In writing or electronically
When a vessel rotates around its vertical axis what is this called
Yaw
When a vessel moves to port and starboard what is it called
Sway
When a vessel moves forward and astern in DP what is it called
Surge
When a vessel moves up and down what is it called
Heave
When a vessel bow goes up and down what is it called
Pitch
When a vessel rotates around its axis of direction what is it called
Role
What are the bigger problems with hydro acoustics on a DP vessel
You have a bigger foot print in deep water
When on DP what must the vessel be able to do safely with respect to the diver
The system should not endanger the diver and he must be clear of the current produced by the thrusters
What is the name of the wind sensor
Anemometer
What is the minimum number of independent refference systems required for diving
3
Can these be all the same
No , at least two should be of different types
How long must the vessel be on DP before diving opps start
30mins
When would you get a DP alarm with respect to power output
At 80%
How many classes of DP are there
3
What alarm would you get for a degraded operational status
Flashing yellow (amber) light with audio alarm
What must you be able to do with the alert
Cancel the audio alarm
What are your actions when you get a yellow alarm
Make job safe then move to agreed safe place
If a DP alarm goes who besides the supervisor will DP tell
Master and superintendent
You ask the DPO to move 5 m,s and do a 10 degree heading change is this ok
No you must do one at a time and wait for the vessel to settle
When doing a move it must stay within what
The scope of all three references
When diving in shallow water do you still need 3 reference systems on line
Yes and one must be a radio or surface reference system
Give two reasons why the DP suffers in shallow water
The scope of the reference system may be less than the vessels natural excursion, the noise from the vessel may interfere with the acoustic system
A DP DSV is on a 4 point mooring 6 Miles offshore in uk waters salvaging a helicopter at 58m,s depth which ACOP regs cover this operation and why
Offshore diving regulations because its deeper than 50m,s
A DSV is on DP in a scottish loch the depth is 200m,s the divers are working at 25m,s what regards cover them
Offshore diving regulations because the vessel is on DP
On a DP vessel when diving you must have comms between who
Dive control and the crane also dive control and DPO
The DPO says you have a boat approaching and cannot contact him what do you do
You get the divers to an agreed safe place ( he has not given you an alarm)
When diving in shallow water which system is least affected
Radio or surface positioning reference
Acoustic beacons for DP PRS must be no closer to a subsea structure than what
10m,s
When diving in shallow water what DP reference systems should be used
Radio or surface positioning systems
Under UK regulations how many independent reference systems must be online
3
Who should a DPO inform when he gets an alarm
Dive supervisor, dive superintendent and the master
On a DP vessel the mobile antenna fir Artemis is where
On the vessel
What type of signal is Artemis
Micro wave radio
What affects it
Fog , mist, people walking in front of it , reflective surfaces
What is the closest a taut wire can be to a structure
10m,s
At 50m,s how far would a platform come out with a batter of 1 in 10
5 m,s
What is the maximum angle of the taut wire before it is required to be re-plumbed
20 degrees
When in DP and in diving mode when can the DPO move the taut wire
Only with the supervisors permission
Can a weak link be used to prevent an umbilical coming into contact with a hazard
No
When diving in shallow water what must one of the references be
Radio or surface position reference
Mooring lines must be identified by what
2 Independant means ( ROV,s buoys)
What clearance must you have between the bell and mooring lines
50m
For this distance to be less than 50m who must agree
The master, superintendent , supervisor and client
If this is done what must be enforced
Monitoring of mooring lines and can be the ROV
What is classed as shallow water
Less than 50m
Where would you find the transponder
On the sea bed
What is the maximum excursion due to vessel motion is allowed
Half the critical
When was DP class established
1st july 1994
What are the parameters of a class 1
Loss of position may occur in the event of a single fault
What are the parameters of a class 2
Loss of position should not occur from a single fault of an active component
What are the parameters of a class 3
Loss of position should not occur from any single failure including flooded compartments
A single fault includes what
A single inadvertent act by any person onboard
How is a yellow alert defined
Degraded DP operational status
How is a red alert defined
DP emergency status ( where there will be loss of position or an inevitable loss of position)
All DP DSV,s must be what class
Class 2 or class 3
With the worst power loss fault possible how long must you be able to maintain DP
30 mins
How many wind sensors do you require
2 in different locations
How many giros are required
3
A dedicated voice communication system should be between who
DP and dive control
You also require a dedicated communications system between what
DP,ECR,ROV,CRANE and dive control
When should these communications be tested
During DP stabilisation
Where else should the DP alarms for red alert be placed
Masters cabin , superintendents cabin or senior diving supervisors cabin
How accurate should the vessel positioning references be
+- 2% of water depth
When working in water depths of less than 60m what should the radius of operation be for each of the three position reference systems
Equal to or greater than 30% of water depth but never less than 5 m,s
How many DPO,s are required in the DP room when diving is underway
2
As far as communications are concerned what are you advised to keep
A communication matrix
Acoustic beacons are to be in what % age of water depth when diving
25%
Position alarms should be set at what for diving
5m
How many vertical reference units should there be
2- 1 can be on standby
In daylight what are the signals to indicate to other vessels that diving is taking place
3 vertical shapes, ball, diamond , ball
At night what are the signals to indicate to other vessels that diving is taking place
3 vertical lights red, white ,red
Heading changes have to be less than what
15 degrees
What is the maximum single movement
10m
What is the preferred movement
5m
What are the dangers of diving from a DP vessel
Being pulled into the prop or a run off
Any vessel running on DP must meet what requirements
Meet technical and industrial standards
Where must the language to be used in a diving job be stated
In the diving project plan
When must the diving stop with respect to gas
When you are at the minimum quantity allowed
What is the minimum for surface diving
- Enough for two dives to max planned working depth.
- Enough to pressure both locks in the DDC to max treatment depth plus complete decompression cycles
- 90m3 ( 3200ft3) of O2
How can this be supplied
From storage or two independent supplies
If it is form two compressors which are electric what must be the set up
One compressor must be on an emergency supply or on another source ie diesel generator
Can you use rig air
No
For mixed gas how much is required for bibs
Enough gas for 4 hours of bibs breathing in addition to other reserves
How much therapeutic gas is to be kept on board
This Is down to the diving contractor
How much gas do you require for a helicopter evacuation
Enough to pressure up the transfer chamber and the chamber on the helicopter
How much gas is required for a bounce dive
- Enough gas to do the dive at the depth required and enough for a dive to max depth
- Enough gas to pressure the deck chamber to transfer twice .if flushing is required then enough for two complete decompressions
- Enough gas to be able to pressurise to max diving depth and to carry out a Saturation decompression in case of medical emergency.
How much gas is required for saturation diving
- Enough to do the intended bell run plus the same again as a reserve
- Enough gas to blow down the system to max working depth plus the same in reserve
- Enough gas to do two complete decompressions from storage including lock runs
- Enough O2 fir metabolic consumption and O2 make up multiplied by 2
Is the gas in the bell bottles part of the reserve
No
Can you use the reserve chamber gas for gas blow down the lifeboat
Yes
What must you do if your gas supplies falls below an agreed minimum
Stop diving
What is the lowest % of O2 in nitrogen or helium for diving
2%
When can you use pure He & N2
For calibration
When heliox or nitrox is used in a divers bailout what must the % be
One to cover the greatest possible depth range
If you get a supply of mixed gas from a supplier what do you check first
Correct markings and the attached analysis certificate
If they co-inside is this ok to use
No it must be analyzed by a competent person
After this when is it analyzed
Before use and during use
Must you keep onboard a bell locator
Yes
What depth must the bell transponder be good too
200m,s
What is the reply frequency of the bell transponder
37.5kHz
What are the interrogation frequencies
A 38.5kHz +- 50Hz
B 39.5kHz +- 50Hz
What is the interrogation pulse width
4m,s
What is the listening life
10 weeks
What is the reply life at 85db
5 days
For the bell locator what is the directivity
+- 15 degrees
What is the minimum detectable range
500m,s
How long a life support must a hyperbaric lifeboat have
72 hours
What other safety factors should be taken into consideration when doing an evacuation
The safety of the people performing the evacuation
The length of the umbilical for a dive should be stated where
The diving project plan
When diving DP mode what must be considered with respect to the umbilical
Fouling and snagging of the umbilical
When a doctor is not available at a dive location what must be done
A system set up so direct communication with the contractors medical advisor and be able to get that information to a doctor
When can you decompress a diver
Only when his condition is stable
When can you transfer an Ill or seriously ill diver in a chamber
When his condition is stable
What should supervisors monitor over the comms with a diver
His breathing rate and reports from the about himself
What things will not assist in assessing safety
Temp, heart rate, and his physiological parameters
Due to the potential problems with high noise levels what must be used
Noise reduction and hearing protection procedures
Safe noise levels for un-hooded divers are what
175db and 30m from source
Safe nouse levels for hooded divers are what
185db and min 10m from source
Flying after diving comes into 2 categories what are they
Air/nitrox diving and mixed gas diving
Two altitudes were taken into consideration, what are they
2,000 feet (600m)
8,000 feet ( 2,600m)
A diver does a no-stop dive for 50 mins within the previous 12 hours, when can he fly below 2,000 feet and above 2,000 feet
2 hours below and 8 hours above
This 8 hours applies to what type of flight
Short flights only
How long would you have to wait under the same circumstances for an international flight
24hrs
For a diver engaged in all other air/nitrox/heliox/bounce activities of less than 4 hours under pressure or a heliox saturation of more than 4 hours, when can he fly
12 hours below and 24 hours above
For a diver having completed an air/nitrox/trimix saturation of more than 4 hours when can he fly
24 hours below and 48 hours above
All the previous are for divers with no what
DCI problems
Following a DCI problem where after recompression the diver is completely resolved of symptoms when can he fly
24 hours below and 48 hours above
Following a DCI problem where residual symptoms are present when can he fly
Consult a diver medical specialist
If a diver gets a DCI in flight which is limb pain only what should be done
Treat with analgesics, oral fluids and O2 if available
If a diver gets a DCI in flight with other symptoms what must be done
Get immediate advice from a diving medical specialist, it may be necessary to divert
After surfacing from a heliox saturation when do any symptoms of a DCI generally appear
Within 6 hours of surfacing
Generally when is it said that you have zero chance of a decompression problem after a sat
36 hours
How long must you remain in the vicinity of a DDC after a saturation, a surface dive requiring stops or a no stop yo yo dive
Within 20 mins from it for 4 hours and within 2 hours for 12 hours after surfacing
How long for a dive less than 10m,s or two dives or less with no decompression
Within 20 mins for 1 hour
If travelling / flying is relevant what two places should have this information
The diving project plan , the contractors generic risk assessment
When do you require active heating
When breathing heliox
When do you require active gas heating
When diving deeper than 150m,s
What is the max duration of a sat under normal conditions
28 days
Under normal conditions divers after a sat how long must you spend on the surface
An equal time
Who must specify the minimum size of the dive team for a given project
The diving contractor
Who must satisfy themselves that each diver is competent for the task he will do
The diving contractor and the diving supervisor
Can a diver who is not competent in a task be used
Yes but he must be given guidance from the other team members and supervisors
Supervisors have a specific responsibilities which cannot be changed where is this recorded
The diving project plan
On projects where there is more than one supervisor what might you have
You may require a senior supervisor or superintendent
What is the minimum team size to run a surface dive UK regs
5 Supervisor Diver S/B diver 2 x tenders
What is the minimum team size for a closed bell dive UK regs
9 2x supervisors Lss Lst 2 x divers S/B Diver Tender Tech
During a closed bell diving operation how many supervisors are required on shift
2
How long may the second supervisor be away from dive control
30 mins
Who should be notified on a change over of supervisors
Divers, deck crew and any other relevant people
How many hours of continuous rest should a diver get
12 hours
A bell run of 8 hours is from when to when
Lock off to lock on
In a two man bell run how long can each diver spend in the water max
4 hours
When are refreshments to be offered to divers
Between the 2nd and 4th hour
Name two things a tender must know with respect to the project
Diving procedures and emergency plans
How many tenders are required when tending from the surface
One for each diver in the water
How many tenders are required when tending from a basket or stage
One for every two divers
How many st/by divers are required
One for every two divers
In a closed bell dive what state of readiness does the surface st/by diver have to be at
His equipment is to he readily available
Who needs to be at the chamber when you have guys in sat
One life support person and one life support person in the vicinity
If the life support control is remote from dive control what must be done
A LSS must be appointed in writing
Can a supervisor take charge of a surface decompression chamber when not directly in contact with it
Yes so long as he has video and audio links
Can persons not employed by the diving contractor be included in the dive team
Yes but must have been vetted to be competent
Give an example
Techs employed by the vessel
When it is expected that you may be working long hours what must be done
It must be risk assessed
Give 5 factors to be taken into account whilst doing the risk assessment
Work patterns Job demands Work environment Work activity Sleep deprivation
Diving contractors should ensure that they have adequately assessed and provided for what
Any health and safety problems that might arise
How many divers require first aid at work certs
All of them
How should gas storage areas be protected
By a fire deluge system
Besides cylinders and quads where appropriate what else should be colour coded
Pipe work
When the diver goes onto his secondary gas supply what must not happen
It must not disrupt the other divers supply
What ever the primary method of breathing a diver must have what
A bailout with sufficient gas to get to a safe place
What must be fitted to a surface or closed bell divers breathing gas supply
An audible visual hi/low oxygen alarm
If reclaim systems are used what is required
Audio/visual hi/low O2 alarm and Hi carbon dioxide alarm
Gas cylinders in dive baskets should have what
A first stage, second stage with mouth piece and a valve with a stiff hose and contents gauge and be secured correctly .
Be opened before the start of the dive .
At what % do you treat a mix as if it was pure oxygen
25%
What must be done for plant to carry oxygen and so 25% or more
Cleaned of hydrocarbons and a written confirmation that a formal cleaning procedure has been followed
How long must the voice recording of a dive be kept
48 hours
What must be done to counter a cut umbilical and stop gas loss from a bell
Non return valves on gas supplies , all gas and water supplies have valves inside as well as out side, all valves to be clearly labelled, a water proof list of valves to be closed and valves to be open , with a copy on the surface
What must be kept in board in case of a lost bell situation
Emergency procedures and the required plant for the location and recovery
How long must the bell sustain lives in the case of trapped divers
24 hours
What must be onboard in case the main lift gear fails
Alternative lifting arrangements
What must be displayed on an emergency rescue craft ( e.g SPHL )
A clear visible when afloat set of 3 IMO agreed markings and instructions
How many types of hyperbaric crafts are there designed to float in water
Three
What is type 1 rescue craft
This has a pressure vessel for the divers and a compartment for the supervisor and crew and Is like a life raft usually self propelled
What is a type 2 rescue craft
A pressure vessel with a protective frame and can be propelled
What is a type 3 rescue craft
A diving bell used on small setups
How should they be coloured
International distress orange on the part above water and with reflective strips
Are they all fitted with toeing harnesses if so how are they fitted
No not all, fitted so it will not wash off but break away straps so it can be got by the towing vessel
How many green signs should be on each craft
Three , one on the top and one each side
What does it look like
A rectangle of minimum sides 1200mm x 450mm with a green back ground with a white cross and a yellow bell
Are there any other signs on it
A warning sign
Name of vessel from
Weight in air
Lifting points
Each type must have what to aide detection
An active method of attracting attention, beacons, lights etc
What type may have different marking systems
Type 3
Where can you find out what the minimum amount of first aid is to be held and where
DMAC 015
A chamber to act as a medical facility should have a minimum diameter of what
1.8m ( 6 feet ) but preferably 2.15m ( 7 feet )
A chamber should have the facility to assemble a bunk to do what
Be waist high, accessible from one side and allow tilting of 30 degrees and a medical lock of at least 300mm diameter, suitable lighting and sufficient gas and electrical penetrations
What are the specs for man riding wires
A breaking strain of 8 times normal working load and non twisting wire
If a main lift wire passes its safety factor 8:1 is it still suitable for use
So long as it doesnt drop to less than 90% of its original value
If the wire has dropped below the previous safety factor and percentage does the whole rope have to be discarded
Not necessarily just cut back and a further cut back test completed
What is required with respect to brakes
You should have a primary and secondary braking system
If the secondary system is hydraulic what I’d required
That if the handle is released or a system failure the brand is applied
What must a winch NOT be fitted with
Pawl and ratchet gear to enable it to pay out
What is the ratio for non-man riding wires
5:1
The HSE has recommended in DVIS 6 which type of wire rope is preferred
Galvanished wire ropes
Why is galvanished rope advised
It provides sacrificial protection and corrosion fatigue and fretting protection
How often should shaves be lubricated
Weekly
What must be done to ensure that multi strand ropes are maintained correctly
They should be pressured lubricated every 6 months
What tension should be applied to the wire rope when Intially wound on the drum
A load equal to the bell Weight in water
How often should the rope be visually inspected
Daily
What indications could you get to show that there could be internal damage
Reduction in diameter and lay distortions
How often should the wire be tested and how
Every 6 months to 1.25 x SWL and a function test at the SWL by a category 3 or 4 competent person
What is defined as the safe working load ( SWL )
Is the weight of the rope and bell when the bell is manned at its heaviest point
How much wire rope is cut back on a yearly basis
From the bell to just past the sheave when the bell is submerged
What is recommended to be done on a yearly basis
That the 6 month inspection is supplemented by NDT inspection
If this is carried out what can be done with respect to the cut back
It may be considerably shorter
If the wire has dropped below safety factor of 8:1 and 90% of it’s original strength, does the whole rope have to be discarded
Yes
What are the specs for a dive basket or open bell
1. To be able to carry 2 divers In an uncramped condition 2. Prevent the divers from falling out 3. To prevent spinning and tipping 4. Have overhead protection and handles 5. A secondary means of recovering the divers must be available
Clamping mechanisms on trunks and locks must have what
An interlock which makes it impossible to open if pressure is inside
What happens to the doors in the chamber when doing a TUP
Should be shut and sealed and not open until the mating doors are shut
What must you have besides an interlock
Communication between supervisor and the station
What type of chamber must be at all work sites covered by this code
Two person two compartment
Due to the extreme conditions plant comes under offshore what must be done
Maintained and tested regularly and inspected immediately before use
Details of maintainance should be entered where
In the diving project plan
What must a plant register logs
- Test certs
- Materials used in the construction of bells and chambers etc
- Any limitations
What document covers testing of plant
IMCA DO18
How often should bailouts be checked and tested
Checked internally every 6 months for water and rust
Checked to BS 5430 every 2 years
How often must bell wires and basket wires be checked and tested
Every 6 months a static test 1.25 x SWL plus function test of system
Every 12 months a static test 1.5 x SWL
How often is it cut back and to where
Every 12 months past the first sheave
How many supervisors can be in charge of a diving operation
Only 1 at any time
Who is the only person that can authorize the start of a dive
The responsible supervisor
Before a diving supervisor starts a dive what must he makes sure of
That he is following the ACOP,s
Has the supervisor got the authority to exclude persons from dive control
Yes under regulation 10
Every person engaged in a diving project must follow who’s direction
The supervisors under regulation 11
Must these people follow his every command
They must follow reasonable directions
Are the main and restricted HSE part certificates issued under diving operations at work regulations 1981 still valid
Yes
Are the transitional certificates still valid
Yes
Are certificates issued by the manpower services commission and the training services agency still valid
Yes, but they can be exchanged for the appropriate HSE certificate
If you take your medical within the month prior to it expiring when will the new certificate date from
From the expiry of the old certificate
Can a diver enter a chamber if he does not hold an in date medical certificate
Only if it’s an emergency to provide medical treatment
What systems does a diving doctor check during a medical
Cardiovascular Respiratory Central nervous Ear, nose , throat , vision and dentition systems A persons capacity for exercise
If a diver has a DCI what should he do
He must enter it in his dive log
On his first dive after his treatment what must he do
Show this entry to the supervisor
Why must he do this
So the supervisor can confirm he is fit and clear to dive
What must the supervisor check about all the divers before a dive
He must check that they are fit to dive and record this in the diving operations record
A doctor who is checking divers prior to a sat must be approved by who
HSE
