1.3 - Definitions
For the purpose of the Code, unless expressly provided otherwise, the terms used therein have the meanings defined in this section.
1.3.1 1988 LL Protocol means the Protocol of 1988 relating to the International Convention on Load Lines, 1966, as amended.
1.3.2 “A” class divisions are as defined in SOLAS regulation II-2/3.
1.3.3 Accommodation spaces are those used for public spaces, corridors, lavatories, cabins, offices, hospitals, cinemas, games and hobbies rooms, pantries containing no cooking appliances and similar spaces. Public spaces are those portions of the accommodation which are used for halls, dining rooms, lounges and similar permanently enclosed spaces.
1.3.4 Administration means the Government of the State whose flag the unit is entitled to fly.
1.3.5 Anniversary date means the day and month of each year which will correspond to the date of expiry of the certificate. 1.3.6 Auxiliary steering gear is the equipment which is provided for effecting movement of the rudder for the purpose of steering the unit in the event of failure of the main steering gear.
1.3.7 “B” class divisions are as defined in SOLAS regulation II-2/3.
1.3.8 “C” class divisions are as defined in SOLAS regulation II-2/3.
1.3.9 Certificate means Mobile Offshore Drilling Unit Safety Certificate.
1.3.10 Coastal State means the Government of the State exercising administrative control over the drilling operations of the unit.
1.3.11 Column-stabilized unit is a unit with the main deck connected to the underwater hull or footings by columns or caissons.
1.3.12 Continuous “B” class ceilings or linings are those “B” class ceilings or linings which terminate only at an “A” or “B” class division.
1.3.13 Control stations are those spaces in which the unit’s radio or main navigating equipment or the emergency source of power is located or where the fire recording or fire control equipment or the dynamic positioning control system is centralized or where a fire-extinguishing system serving various locations is situated. In the case of column-stabilized units a centralized ballast control station is a “control station”. However, for purposes of the application of chapter 9, the space where the emergency source of power is located is not considered as being a control station.
1.3.14 D or D-value means the largest dimension of the helicopter when rotor(s) are turning measured from the most forward position of the main rotor tip path plane to the most rearward position of the tail rotor path plane or helicopter structure.
1.3.15 Dead ship condition is the condition under which the main propulsion plant, boilers and auxiliaries are not in operation due to the absence of power.
1.3.16 Depth for freeboard has the same meaning as defined in regulation 3 of the 1988 LL Protocol.
1.3.17 Diving system is the plant and equipment necessary for the safe conduct of diving operations from a mobile offshore drilling unit.
1.3.18 Downflooding means any flooding of the interior of any part of the buoyant structure of a unit through openings which cannot be closed watertight or weathertight, as appropriate, in order to meet the intact or damage stability criteria, or which are required for operational reasons to be left open.
1.3.19 Emergency source of electrical power is a source of electrical power intended to supply the necessary services in the event of failure of the main source of electrical power.
1.3.20 Emergency switchboard is a switchboard which, in the event of failure of the main system of electrical power supply, is directly supplied by the emergency source of electrical power and/or the transitional source of emergency power and is intended to distribute electrical energy to the emergency services.
1.3.21 Enclosed spaces are spaces delineated by floors, bulkheads and/or decks which may have doors or windows.
1.3.22 Freeboard is the distance measured vertically downwards amidships from the upper edge of the deck line to the upper edge of the related load line.
1.3.23 FSS Code means the International Code for Fire Safety Systems, adopted by the Maritime Safety Committee of the Organization by resolution MSC.98(73), as amended.
1.3.24 FTP Code means the International Code for Application of Fire Test Procedures, adopted by the Maritime Safety Committee of the Organization by resolution MSC.61(67), as amended.
1.3.25 Gastight door is a solid, close-fitting door designed to resist the passage of gas under normal atmospheric conditions.
1.3.26 Hazardous areas are all those areas where, due to the possible presence of a flammable atmosphere arising from the drilling operations, the use without proper consideration of machinery or electrical equipment may lead to fire hazard or explosion.
1.3.27 Helideck is a purpose-built helicopter landing platform located on a mobile offshore drilling unit (MODU).
1.3.28 Industrial machinery and components are the machinery and components which are used in connection with the drilling operation.
1.3.29 Length (L) has the same meaning as defined in regulation 3 of the 1988 LL Protocol.
1.3.30 Lightweight is the displacement of a unit in tonnes without variable deck load, fuel, lubricating oil, ballast water, fresh water and feedwater in tanks, consumable stores, and personnel and their effects.
1.3.31 Low-flame spread has the same meaning as defined in SOLAS regulation II-2/3.
1.3.32 LSA Code means the International Life-Saving Appliance Code, adopted by the Maritime Safety Committee of the Organization by resolution MSC.48(66), as amended.
1.3.33 Machinery spaces are all machinery spaces of category A and all other spaces containing propelling machinery, boilers and other fired processes, oil fuel units, steam and internal combustion engines, generators and major electrical machinery, oil filling stations, refrigerating, stabilizing, ventilation and air-conditioning machinery and similar spaces; and trunks to such spaces.
1.3.34 Machinery spaces of category A are all spaces which contain internal combustion-type machinery used either:
- for main propulsion; or
- for other purposes where such machinery has in the aggregate a total power of not less than 375 kW;
or which contain any oil-fired boiler or oil fuel unit; and trunks to such spaces.
1.3.35 Main source of electrical power is a source intended to supply electrical power for all services necessary for maintaining the unit in normal operational and habitable conditions.
1.3.36 Main steering gear is the machinery, the steering gear power units, if any, and ancillary equipment and the means of applying torque to the rudder stock, e.g. tiller or quadrant, necessary for effecting movement of the rudder for the purpose of steering the unit under normal service conditions.
1.3.37 Main switchboard is a switchboard directly supplied by the main source of electrical power and intended to distribute electrical energy to the unit’s services.
1.3.38 Maximum ahead service speed is the greatest speed which the unit is designed to maintain in service at sea at its deepest seagoing draught.
1.3.39 Maximum astern speed is the speed which it is estimated the unit can attain at the designed maximum astern power at its deepest seagoing draught.
1.3.40 Mobile offshore drilling unit (MODU) or unit is a vessel capable of engaging in drilling operations for the exploration for or exploitation of resources beneath the seabed such as liquid or gaseous hydrocarbons, sulphur or salt.
1.3.41 Mode of operation means a condition or manner in which a unit may operate or function while on location or in transit. The modes of operation of a unit include the following:
- Operating conditions – conditions wherein a unit is on location for the purpose of conducting drilling operations, and combined environmental and operational loadings are within the appropriate design limits established for such operations. The unit may be either afloat or supported on the seabed, as applicable.
- Severe storm conditions – conditions wherein a unit may be subjected to the most severe environmental loading for which the unit is designed. Drilling operations are assumed to have been discontinued due to the severity of the environmental loading. The unit may be either afloat or supported on the seabed, as applicable.
- Transit conditions – conditions wherein a unit is moving from one geographical location to another.
1.3.42 Non-combustible material has the same meaning as defined in SOLAS regulation II-2/3.
1.3.43 Normal operational and habitable conditions means:
- conditions under which the unit as a whole, its machinery, services, means and aids ensuring safe navigation when underway, safety when in the industrial mode, fire and flooding safety, internal and external communications and signals, means of escape and winches for rescue boats, as well as the means of ensuring the minimum comfortable conditions of habitability, are in working order and functioning normally; and
- drilling operations.
1.3.44 Oil fuel unit is the equipment used for the preparation of oil fuel for delivery to an oil-fired boiler, or equipment used for the preparation for delivery of heated oil to an internal combustion engine, and includes any oil pressure pumps, filters and heaters dealing with oil at a pressure more than 0.18 N/mm2. Oil transfer pumps are not considered oil fuel units.
1.3.45 Organization means the International Maritime Organization (IMO).
1.3.46 Rescue boat has the same meaning as defined in SOLAS regulation III/3.
1.3.47 Self-elevating unit is a unit with movable legs capable of raising its hull above the surface of the sea and lowering it back into the sea.
1.3.48 Semi-enclosed locations are locations where natural conditions of ventilation are notably different from those on open decks due to the presence of structures such as roofs, windbreaks and bulkheads and which are so arranged that dispersion of gas may not occur.
1.3.49 Service spaces are those used for galleys, pantries containing cooking appliances, lockers and store-rooms, workshops other than those forming part of the machinery spaces, and similar spaces and trunks to such spaces.
1.3.50 SOLAS means the International Convention for the Safety of Life at Sea, 1974, as amended.
1.3.51 Standard fire test is as defined in SOLAS regulation II-2/3.
1.3.52 Steel or equivalent material has the same meaning as defined in SOLAS regulation II-2/3.
1.3.53 Steering gear power unit means, in the case of:
- electric steering gear, an electric motor and its associated electrical equipment;
- electrohydraulic steering gear, an electric motor and its associated electrical equipment and connected pump;
- other hydraulic gear, a driving engine and connected pump.
1.3.54 Surface unit is a unit with a ship- or barge-type displacement hull of single or multiple hull construction intended for operation in the floating condition.
1.3.55 Survival craft has the same meaning as defined in SOLAS regulation III/3.
1.3.56 Visitors are personnel not regularly assigned to the unit.
1.3.57 Watertight means the capability of preventing the passage of water through the structure in any direction under a head of water for which the surrounding structure is designed.
1.3.58 Weathertight means that in any sea conditions water will not penetrate into the unit.
1.3.59 Working spaces are those open or enclosed spaces containing equipment and processes, associated with drilling operations, which are not included in hazardous areas and machinery spaces.