Critical Ship Equipment- Working on critical systems
What are Critical Ship Equipment ?
If a sudden operational failure of equipment or technical
systems on board may result in a hazardous situation, that
equipment or system isconsidered critical. Master and Chief
Engineer must draw up a list of Critical Ship Functions and
Critical Equipment (Main and Standby). TheseCritical Lists are to
be formalised on board and sent to the office. The agreed list of
Critical Equipment must be accurately reflected and identifiedin
the vessels PMS.This list will always include; Supply of electrical
power to essential services, Propulsion, Steering ,Main Engine,
Steering gear,Generators
Critical Ship FunctionsThe list of critical ship functions may
also include ship specific functions, for example the capability to
recover from a semi-submerged conditionfor a heavy-lift vessel.
Critical Stand-By EquipmentWorking from the basis of the
critical machinery list, a list of critical stand-by arrangements
should be drawn up. The critical stand-byarrangements list should
be decided using the criteria of Will a single critical stand-by
arrangement failure compromise one of the criticalmachinery
functions.
The critical stand-by arrangement list will generally
include:
Electrical Generating Plant1.Main Air Compressor Sets2.Control
Air Compressor Sets3.Main and Auxiliary Engine circulating systems
pump sets4.Main Engine Electrical Blower5.Main Switchboard and
Components6.Main and Auxiliary Engine system filters7.HFO & LO
pumps8.Feed Water System Pump Sets9.Boiler Circulating Pump
Sets10.Boiler Water Gauge Glass Sets11.Boiler Safety Valve
Sets12.Steering Gear Pump Sets13.Rudder, Shafting and Propeller
systems14.Control engineering items15.Ships Side Valves16.Windlass
and Mooring Sets17.High and Low Level Alarms18.Stand-by Whistle,
Siren Horn etc19.Critical Idle Functions (Equipment which is safety
critical but not in day-to-day use).20.Quick closing valves, Remote
stops and switches21.Over-speed trip arrangements22.First start
arrangement23.Emergency Electrical Generating Plan24.Emergency
Lighting25.Emergency Compressor26.
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Emergency Fire Pump27.Fire Fighting and Detection
Systems28.Safety and Lifesaving Equipment29.B.A.
Compressor30.Emergency Steering Arrangement31.Main & Auxiliary
Engine Shutdown arrangements.32.
Minimum Stock Level for Critical, Spare Parts, Consumables and
Tools
It is the responsibility of the Chief Engineer to set the
minimum level stock listing, customised for each vessel and to
formally agree with the FleetSuperintendent the contents of the
list.
The Chief Engineer must then maintain the agreed minimum stock
levels and to ensure, as appropriate, the necessary requisitions.
Deficienciesare to be brought to the attention of the Master and
the technical Department of the relevant management Office as
Critical Spares InventoryMonthly Report . This report must be
completed and returned to the Managing Officer. The under-mentioned
listings are the recommendedMinimum Stock Levels for the items
list.
Working on critical equipment and systems
Persons who are responsible for the operation, maintenance,
repair of critical equipment and systems, as well as the
calibration and adjustmentof alarms and other parameters of the
equipment, must be properly qualified, trained or experienced in
the use of these crucial items. Either theMaster or Chief Engineer
is responsible for ensuring that the competency of the person
involved in the maintenance is sufficient to carry out thetask or
must personally supervise critical phases of overhaul. If there is
any doubt as to the ability and competence of those onboard to
carry outa particular task successfully on critical equipment or
systems, then the management office must be notified for further
guidance and/orinstruction as to how to proceed.
Whenever routine planned maintenance of major critical equipment
is to be carried out that involves shutting down the equipment,
ships staff willconsult with the management cell. A risk assessment
will be required before the equipment is shut down. The risk
assessment will include, but notbe limited to, addressing the
following topics:
Alternative back-up equipment / systems.1.Any necessary
modification in operational procedures as a result of the equipment
being out of service.2.Any additional safety procedures (emergency
equipment etc).3.
If the agreed out of service period for critical equipment or
systems maintenance cannot be achieved, any extension or
alternative actions willrequire review by the shore management. In
additional, a further risk assessment may be required if
circumstances (such as environmentalconditions, crew fatigue or
operational parameters) change.
Trends and historical data recorded in PMS should be used to
modify the maintenance interval or critical systems, in order to
prevent incidents orout of service periods that could be associated
with a failure.
Ordering Critical Repairs or Spares
When any item from this list requires a spare or repair, the
Requisition Form must be endorsed Spare for Critical Equipment
markedappropriately and followed up with a telephone call, as
explained in the Purchasing Section of these procedures.
It is the responsibility of the Chief Engineer to set the
minimum level stock listing, customised for each vessel and to
formally agree with the FleetSuperintendent the contents of the
list. The Chief Engineer must then maintain the agreed minimum
stock levels and to ensure, as appropriate,the necessary
requisitions. Deficiencies are to be brought to the attention fo
the Master and the technical Department of the relevantmanagement
Office as Critical Spares Inventory Monthly Report . This report
must be completed and returned to the Managing Officer.
Quick Checklist (QCL)
For portable tools and equipment which are more likely to get
lost or stolen, and which are costly and essential for work and
running of the ship,a Q.C.L. list must be established. Include some
of the items listed in the inventory for the ship, and one copy of
the Q.C.L. to be forwarded to theCompany.
For the Deck Department, the following similar items are
included: binoculars, walkie-talkies, sextants and other mobile
navigational aids,professional books supplied by the owners (e.g.
Handbook, IMO dangerous goods code etc.,) large ropes, power tools,
valuable entertainmentequipment, typewriters, calculators etc. For
the Engine Department, the following similar items are included:
measuring tools, test instruments,power tools.
Such Q.C.L. is not normally to contain more than 10 to 15 items.
This list must also include items which are in custody of the
senior officers, suchas the Chief Mate, 1st Assistant Engineer,
Electrician, etc., and when there is a change of Master or Chief
Engineer, the content of the list must beconfirmed. The Master and
the Chief Engineer are to check these items against the Q.C.L. when
there is a change of officer, and report anydiscrepancies
immediately to the Company.
Below is our guideline for working principles and operational
guideline for machinery spaces:
Marine diesel engine operational procedures
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