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AMENDMENTS TO THE INTERNATIONAL CONVENTION FOR THE SAFETY OF LIFEAT SEA, 1974

AMENDMENTS TO THE INTERNATIONAL CONVENTION FOR THE SAFETY OF LIFEAT SEA, 1974 [Adopted on 20 November 1981 by Resolution MSC .1 (XLV)] 1.1 General 1.1.1 The basic principle underlying the provisions of this Regulation is that as normal main vertical zoning may not be practicable in special category spaces, equivalent protection must be obtained in such spaces on the basis of a horizontal zone concept and by the provision of an efficient fixed fire-extinguishing system. Under this concept a horizontal zone for the purpose of this Regulation may include special category spaces on more than one deck provided that the total overall clear height for vehicles does not exceed 10 m.

1.1.2 The requirements of Regulations 16, 18, 30 and 32 for maintaining the integrity of vertical zones shall be applied equally to decks and bulkheads forming the boundaries separating horizontal zones from each other and from the remainder of the ship.

1.2 Structural protection 1.2.1 Boundary bulkheads of special category spaces shall be insulated as required for category (11) spaces in table 26.1 or in table 27.1 and the horizontal boundaries as required for category (11) spaces in table 26.3 or in table 27.2.

1.2.2 Indicators shall be provided on the navigating bridge which shall indicate when any fire door leading to or from the special category spaces is closed.

1.3 Fixed fire-extinguishing system* [* Reference is made to Recommendation on Fixed Fire-Extinguishing Systems for Special Category Spaces, adopted by the Organization by resolution A. 123 (V).] Each special category space shall be fitted with an approved fixed pressure water-spraying system for manual operation which shall protect all parts of any deck and vehicle platform in such space, provided that the Administration may permit the use of any other fixed fire-extinguishing system that has been shown by full-scale test in conditions simulating a flowing petrol fire in a special category space to be not less effective in controlling fires likely to occur in such a space.

1.4 Patrols and detection 1.4.1 An efficient patrol system shall be maintained in special category spaces. In any such space in which the patrol is not maintained by a continuous fire watch at all times during the voyage there shall be provided an automatic fire detection system of an approved type.

1.4.2 Manually operated call points shall be provided as necessary throughout the special category spaces and one shall be placed close to each exit from such spaces.

1.5 Fire-extinguishing equipment There shall be provided in each special category space: .1 at least three water fog applicators; .2 one portable foam applicator unit complying with the provisions of Regulation 6. 4, provided that at least two such units are available in the ship for use in such spaces; and .3 such number of portable fire extinguishers as the Administration may deem sufficient, provided that at least one portable extinguisher is located at each access to such spaces.

1.6 Ventilation system 1.6.1 There shall be provided an effective power ventilation system for the special category spaces sufficient to give at least 10 air changes per hour. The system for such spaces shall be entirely separated from other ventilation systems and shall be operating at all times when vehicles are in such spaces. The Administration may require an increased number of air changes when vehicles are being loaded and unloaded.

Ventilation ducts serving special category spaces capable of being effectively sealed shall be separated for each such space. The system shall be capable of being controlled from a position outside such spaces.

1.6.2 The ventilation shall be such as to prevent air stratification and the formation of air pockets.

1.6.3 Means shall be provided to indicate on the navigating bridge any loss or reduction of the required ventilating capacity.

1.6.4 Arrangements shall be provided to permit a rapid shut-down and effective closure of the ventilation system in case of fire, taking into account the weather and sea conditions.

1.6.5 Ventilation ducts, including dampers, shall be made of steel and their arrangement shall be to the satisfaction of the Administration.

2 Additional provisions applicable only to special category spaces above the bulkhead deck 2.1 Scuppers In view of the serious loss of stability which could arise due to large quantities of water accumulating on the deck or decks consequent on the operation of the fixed pressure water-spraying system, scuppers shall be fitted so as to ensure that such water is rapidly discharged directly overboard.

2.2 Precautions against ignition of flammable vapours 2.2.1 On any deck on which vehicles are carried and on which explosive vapours might be expected to accumulate, equipment which may constitute a source of ignition of flammable vapours and, in particular, electrical equipment and wiring, shall be installed at least 450 mm above the deck.

Electrical equipment installed at more than 450 mm above the deck shall be of a type so enclosed and protected as to prevent the escape of sparks.

However, if the Administration is satisfied that the installation of electrical equipment and wiring at less than 450 mm above the deck is necessary for the safe operation of the ship, such electrical equipment and wiring may be installed provided that it is of a type approved for use in an explosive petrol and air mixture.

2.2.2 Electrical equipment and wiring, if installed in an exhaust ventilation duct, shall be of a type approved for use in explosive petrol and air mixtures and the outlet from any exhaust duct shall be sited in a safe position, having regard to other possible sources of ignition.

3 Additional provisions applicable only to special category spaces below the bulkhead deck 3.1 Bilge pumping and drainage In view of the serious loss of stability which could arise due to large quantities of water accumulating on the deck or tank top consequent on the operation of the fixed pressure water-spraying system, the Administration may require pumping and drainage facilities to be provided additional to the requirements of Regulation II-1/21.

3.2 Precautions against ignition of flammable vapours 3.2.1 Electrical equipment and wiring, if fitted, shall be of a type suitable for use in explosive petrol and air mixtures. Other equipment which may constitute a source of ignition of flammable vapours shall not be permitted.

3.2.2 Electrical equipment and wiring, if installed in an exhaust ventilation duct, shall be of a type approved for use in explosive petrol and air mixtures and the outlet from any exhaust duct shall be sited in a safe position, having regard to other possible sources of ignition.

Regulation 38 Protection of cargo spaces, other than special cat-egory spaces, intended for the carriage of motor vehicles with fuel intheir tanks for their own propulsion In any cargo space (other than special category spaces) containing motor vehicles with fuel in their tanks for their own propulsion, the following provisions shall be complied with.

1 Fire detection There shall be provided an approved automatic fire detection and fire alarm system. The design and arrangements of this system shall be considered in conjunction with the ventilation requirements referred to in paragraph 3.

2 Fire-extinguishing arrangements 2.1 There shall be fitted a fixed fire-extinguishing system which shall comply with the provisions of Regulation 5, except that, if a carbon dioxide system is fitted, the quantity of gas available shall be at least sufficient to give a minimum volume of free gas equal to 45 per cent of the gross volume of the largest such cargo space which is capable of being sealed, and the arrangements shall be such as to ensure that at least two thirds of the gas required for the relevant space shall be introduced during 10 minutes. Any other fixed gas fire-extinguishing system or fixed high expansion foam fire-extinguishing system may be fitted provided it gives equivalent protection. Furthermore, any cargo space designated only for vehicles which are not carrying any cargo may be fitted with fixed halogenated hydrocarbon fire-extinguishing systems which shall comply with the provisions of Regulation 5.

2.2 As an alternative, a system meeting the requirements of Regulation 37.1.3 may be fitted, provided that Regulation 37.2.1 or 37.3.1, as appropriate, is also complied with.

2.3 There shall be provided for use in any such space such number of portable fire extinguishers as the Administration may deem sufficient. At least one portable extinguisher shall be located at each access to such spaces.

3 Ventilation system 3.1 There shall be provided an effective power ventilation system sufficient to give at least 10 air changes per hour for ships carrying more than 36 passengers, and 6 air changes per hour for ships carrying not more than 36 passengers. The system for such cargo spaces shall be entirely separate from other ventilation systems and shall be operating at all times when vehicles are in such spaces. Ventilation ducts serving such cargo spaces capable of being effectively sealed shall be separated for each such space. The system shall be capable of being controlled from a position outside such spaces.

3.2 The ventilation shall be such as to prevent air stratification and the formation of air pockets.

3.3 Means shall be provided to indicate on the navigating bridge any loss or reduction of the required ventilating capacity.

3.4 Arrangements shall be provided to permit a rapid shut-down and effective closure of the ventilation system in case of fire, taking into account the weather and sea conditions.

3.5 Ventilation ducts, including dampers, shall be made of steel and their arrangement shall be to the satisfaction of the Administration.

4 Precautions against ignition of flammable vapours 4.1 Electrical equipment and wiring, if fitted, shall be of a type suitable for use in explosive petrol and air mixtures. Other equipment which may constitute a source of ignition of flammable vapours shall not be permitted.

4.2 Electrical equipment and wiring, if installed in an exhaust ventilation duct, shall be of a type approved for use in explosive petrol and air mixtures and the outlet from any exhaust duct shall be sited in a safe position, having regard to other possible sources of ignition.

4.3 Scuppers shall not be led to machinery or other spaces where sources of ignition may be present.

Regulation 39 Fixed fire- extinguishing arrangements in cargospaces 1 Except as provided for in paragraph 3, the cargo spaces of ships of 1,000 tons gross tonnage and upwards shall be protected by affixed gas fire-extinguishing system complying with the provisions of Regulation 5, or by a fixed high expansion foam fire-extinguishing system which gives equivalent protection.

2 Where it is shown to the satisfaction of the Administration that a ship is engaged on voyages of such short duration that it would be unreasonable to apply the requirements of paragraph 1 and also in ships of less than 1,000 tons gross tonnage, the arrangements in cargo spaces shall be to the satisfaction of the Administration.

3 A ship engaged in the carriage of dangerous goods shall be provided in any cargo spaces with a fixed gas fire-extinguishing system complying with the provisions of Regulation 5 or with a fire-extinguishing system which in the opinion of the Administration gives equivalent protection for the cargoes carried.

Regulation 40 Fire patrols, detection, alarms and public addresssystems 1 Manual alarms shall be fitted throughout the accommodation and service spaces to transmit an alarm immediately to the navigating bridge or main fire control station.

2 An approved fire detection or fire alarm system shall be provided which will automatically indicate at one or more suitable points or stations the presence or indication of fire and its location in any cargo space which, in the opinion of the Administration, is not accessible except where it is shown to the satisfaction of the Administration that the ship is engaged on voyages of such short duration that it would be unreasonable to apply this requirement.

3 All ships shall at all times when at sea, or in port (except when out of service), be so manned or equipped as to ensure that any initial fire alarm is immediately received by a responsible member of the crew.

4 A special alarm, operated from the navigating bridge or fire control station, shall be fitted to summon the crew. This alarm may be part of the ship's general alarm system but it shall be capable of being sounded independently of the alarm to the passenger spaces.

5 A public address system or other effective means of communication shall be available throughout the accommodation and service spaces and control stations.

6 For ships carrying more than 36 passengers an efficient patrol system shall be maintained so that an outbreak of fire may be promptly detected. Each member of the fire patrol shall be trained to be familiar with the arrangements of the ship as well as the location and operation of any equipment he may be called upon to use.

Regulation 41 Special requirements for ships carrying dangerousgoods The requirements of Regulation 54 shall apply, as appropriate, to passenger ships carrying dangerous goods.

PART C FIRE SAFETY MEASURES FOR CARGO SHIPS (Regulation 54 of this Part also applies to passenger ships as appropriate).

Regulation 42 Structure 1 Subject to the provisions of paragraph 4, the hull, superstructure, structural bulkheads, decks and deckhouses shall be constructed of steel or other equivalent material.

2 The insulation of aluminium alloy components of "A" or "B" class divisions, except structure which in the opinion of the Administration is non-load-bearing, shall be such that the temperature of the structural core does not rise more than 200”ę above the ambient temperature at any time during the applicable exposure to the standard fire test.

3 Special attention shall be given to the insulation of aluminium alloy components of columns, stanchions and other structural members required to support lifeboat and liferaft stowage, launching and embarkation areas, and "A" and "B" class divisions, to ensure: .1 that for such members supporting lifeboat and liferaft areas and "A" class divisions, the temperature rise limitation specified in paragraph 2 shall apply at the end of one hour; and .2 that for such members required to support "B" class divisions, the temperature rise limitation specified in paragraph 2 shall apply at the end of half an hour.

4 Crowns and casings of machinery spaces of category A shall be of steel construction adequately insulated and openings therein, if any, shall be suitably arranged and protected to prevent the spread of fire.

5 One of the following methods of protection shall be adopted in accommodation and service areas: .1 Method IC-The construction of all internal divisional bulkheading of non-combustible "B" or "C" class divisions generally without the installation of an automatic sprinkler, fire detection and fire alarm system in the accommodation and service spaces, except as required by Regulation 52.1; or .2 Method IIC-The fitting of an automatic sprinkler, fire detection and fire alarm system as required by Regulation 52.2 for the detection and extinction of fire in all spaces in which fire might be expected to originate, generally with no restriction on the type of internal divisional bulkheading; or .3 Method IIIC-The fitting of a fixed fire detection and fire alarm system, as required by Regulation 52.3, in all spaces in which a fire might be expected to originate, generally with no restriction on the type of internal divisional bulkheading, except that in no case must the area of any accommodation space or spaces bounded by an "A" or "B" class division exceed 50 square m . Consideration may be given by the Administration to increasing this area for public spaces.

6 The requirements for the use of non-combustible materials in construction and insulation of the boundary bulkheads of machinery spaces, control stations, service spaces, etc., and the protection of stairway enclosures and corridors will be common to all three methods outlined in paragraph 5.

Regulation 43 Bulkheads within the accommodation and servicespaces 1 All bulkheads required to be "B" class divisions shall extend from deck to deck and to the shell or other boundaries, unless continuous "B" class ceilings or linings are fitted on both sides of the bulkhead in which case the bulkhead may terminate at the continuous ceiling or lining.

2 Method IC-All bulkheads not required by this or other Regulations of this Part to be "A" or "B" class divisions, shall be of at least "C" class construction.

3 Method IIC-There shall be no restriction on construction of bulkheads not required by this or other Regulations of this Part to be "A" or "B" class divisions except in individual cases where "C" class bulkheads are required in accordance with table 44.1.

4 Method IIIC-There shall be no restriction on the construction of bulkheads not required by this Part to be "A" or "B" class divisions except that the area of any accommodation space or spaces bounded by a continuous "A" or "B" class division must in no case 2 exceed 50 m except in individual cases where "C" class bulkheads are required in accordance with table 44.1. Consideration may be given by the Administration to increasing this area for public space.

Regulation 44 Fire integrity of bulkheads and decks 1 In addition to complying with the specific provisions for fire integrity of bulkheads and decks mentioned elsewhere in this Part, the minimum fire integrity of bulkheads and decks shall be as prescribed in tables 44.1 and 44.2.

2 The following requirements shall govern application of the tables: .1 Tables 44.1 and 44.2 shall apply respectively to the bulkheads and decks separating adjacent spaces.

.2 For determining the appropriate fire integrity standards to be applied to divisions between adjacent spaces, such spaces are classified according to their fire risk as shown in categories (1) to (11) below. The title of each category is intended to be typical rather than restrictive.

The number in parentheses preceding each category refers to the applicable column or row in the tables.

(1) Control stations Spaces containing emergency sources of power and lighting.

Wheelhouse and chartroom.

Spaces containing the ship's radio equipment.

Fire-extinguishing rooms, fire control rooms and fire-recording stations.

Control room for propulsion machinery when located outside the machinery space.

Spaces containing centralized fire alarm equipment.

(2) Corridors Corridors and lobbies.

(3) Accommodation spaces Spaces as defined in Regulation 3.10, excluding corridors.

(4) Stairways Interior stairways, lifts and escalators (other than those wholly contained within the machinery spaces) and enclosures thereto.

In this connexion, a stairway which is enclosed only at one level shall be regarded as part of the space from which it is not separated by a fire door.

(5) Service spaces (low risk) Lockers and store-rooms having an area of less than 2 square m, drying rooms and laundries.

(6) Machinery spaces of category A Spaces as defined in Regulation 3.19.

TABLE 44.1 -FIRE INTEGRITY OF BULKHEADS SEPARATING ADJACENT SPACES |------------------------------ || | | | | | | Space || (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || e | | | | | | | Control stations (1)|| A-0 | A-0 | A-60 | A-0 | A-15 | A-60 | A-15 | A-60 | A-60 | * | A-60 | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || C | B-0 | B-0 | B-0 | A-60 | A-0 | A-0 | A-0 | * | A-30 | | Corridors (2)|| | c | | | | || | A-0 | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || | a,b | | | | | | Accommodation spaces (3)|| | C | B-0 | B-0 | A-60 | A-0 | A-0 | A-0 | * | A-30 | || | c | | | | || | A-0 | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || | B-0 | B-0 | A-60 | A-0 | A-0 | A-0 | * | A-30 | | Stairways (4)|| | c | | | | || | A-0 | A-0 | | | * | || | | c | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| |----------||---|---|---|---|---|---|---|---|---|---|---| || | | | | | | Service spaces (low risk) (5)|| | | C | A-60 | A-0 | A-0 | A-0 | * | A-0 | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || | | | g | | f| | Machinery spaces of category A (6)|| | | * | A-0 | A-0 | A-60 | * | A-60 | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || | | | d | | | | Other machinery spaces (7)|| | | | A-0 | A-0 | A-0 | * | A-0 | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| |----------||---|---|---|---|---|---|---|---|---|---|---| || | | | | | | Cargo spaces (8)|| | | | * | A-0 | * | A-0 | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || | | | | d | | | Service spaces (high risk) (9)|| | | | | A-0 | * | A-30 | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| || | | | | | | Open decks (10)|| | | | | - | A-0 | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| | Ro/ro cargo (11)|| | | | | | h | | spaces || | | | | | * | |------------------------------ Notes: To be applied to tables 44.1 and 44.2, as appropriate.

a) No special requirements are imposed upon bulkheads in methods IIC and IIIC fire protection.

b) In case of method IIIC "B" class bulkheads of "B-0" rating shall be provided between spaces or groups of spaces of 50 square m and over in area.

c) For clarification as to which applies, see Regulations 43 and 46.

d) Where spaces are of the same numerical category and superscript d appears, a bulkhead or deck of the rating shown in the tables is only required when the adjacent spaces are for a different purpose, e.g. in category (9). A galley next to a galley does not require a bulkhead but a galley next to a paint room requires an "A-0" bulkhead.

e) Bulkheads separating the wheelhouse, chartroom and radio room from each other may be "B-0" rating.

f) A-0 rating may be used if no dangerous goods are intended to be carried or if such goods are stowed not less than 3 m horizontally from such bulkhead.

g) For cargo spaces in which dangerous goods are intended to be carried, Regulation 54.2.8 applies.

h) Bulkheads and decks separating ro/ro cargo spaces shall be capable of being closed reasonably gastight and such divisions shall have "A" class integrity in so far as is reasonable and practicable in the opinion of the Administration.

i) Fire insulation need not be fitted if the machinery space in category (7), in the opinion of the Administration, has little or no fire risk.

* Where an asterisk appears in the tables, the division is required to be of steel or other equivalent material but is not required to be of "A" class standard.

TABLE 44.2 -FIRE INTEGRITY OF DECKS SEPARATING ADJACENT SPACES |------------------------------ || | | | | | | Space below”ż Space above”ś || (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---|---| | Control stations (1)|| A-0 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | A-0 | A-0 | * | A-60 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Corridors (2)|| A-0 | * | * | A-0 | * | A-60 | A-0 | A-0 | A-0 | * | A-30 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Accommodation spaces (3)|| A-60 | A-0 | * | A-0 | * | A-60 | A-0 | A-0 | A-0 | * | A-30 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Stairways (4)|| A-0 | A-0 | A-0 | * | A-0 | A-60 | A-0 | A-0 | A-0 | * | A-30 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Service spaces (low risk) (5)|| A-15 | A-0 | A-0 | A-0 | * | A-60 | A-0 | A-0 | A-0 | * | A-0 | |----------||---|---|---|---|---|---|---|---|---|---|---| |----------||---|---|---|---|---|---|---|---|---|---|---| || | | | | | | Machinery spaces of category A (6)|| | | | i| | | || A-60 | A-60 | A-60 | A-60 | A-60 | * | A-60 | A-30 | A-60 | * | A-60 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Other machinery spaces (7)|| A-15 | A-0 | A-0 | A-0 | A-0 | A-0 | * | A-0 | A-0 | * | A-0 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Cargo spaces (8)|| A-60 | A-0 | A-0 | A-0 | A-0 | A-0 | A-0 | * | A-0 | * | A-0 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Service spaces (high risk) (9)|| | | | | d | | || A-60 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | A-0 | A-0 | * | A-30 | |----------||---|---|---|---|---|---|---|---|---|---|---| | Open decks (10)|| * | * | * | * | * | * | * | * | * | - | * | |----------||---|---|---|---|---|---|---|---|---|---|---| | Ro/ro cargo spaces (11)|| | | | | | h | || A-60 | A-30 | A-30 | A-30 | A-0 | A-60 | A-0 | A-0 | A-30 | * | * | |------------------------------ (7) Other machinery spaces Spaces as defined in Regulation 3.20 excluding machinery spaces of category A.

(8) Cargo spaces All spaces used for cargo (including cargo oil tanks) and trunkways and hatchways to such spaces.

(9) Service spaces (high risk) Galleys, pantries containing cooking appliances, paint and lamp rooms, lockers and store-rooms having an area of 2 square m or more, workshops other than those forming part of the machinery spaces.

(10) Open decks Open deck spaces and enclosed promenades having no fire risk. Air spaces (the space outside superstructures and deckhouses).

(11) Ro/ro cargo spaces Spaces as defined in Regulation 3.14. Cargo spaces intended for the carriage of motor vehicles with fuel in their tanks for their own propulsion.

3 Continuous "B" class ceilings or linings, in association with the relevant decks or bulkheads, may be accepted as contributing, wholly or in part, to the required insulation and integrity of a division.

4 External boundaries which are required in Regulation 42.1 to be of steel or other equivalent material may be pierced for the fitting of windows and sidescuttles provided that there is no requirement for such boundaries to have "A" class integrity elsewhere in this Part. Similarly, in such boundaries which are not required to have "A" class integrity, doors may be of materials to the satisfaction of the Administration.

Regulation 45 Means of escape 1 Stairways and ladders shall be so arranged as to provide, from all accommodation spaces and from spaces in which the crew is normally employed, other than machinery spaces, ready means of escape to the open deck and thence to the lifeboats and liferafts. In particular the following general provisions shall be complied with: .1 At all levels of accommodation there shall be provided at least two widely separated means of escape from each restricted space or group of spaces.

.2.1 Below the lowest open deck the main means of escape shall be a stairway and the second escape may be a trunk or a stairway.

.2.2 Above the lowest open deck the means of escape shall be stairways or doors to an open deck or a combination thereof.

.3 Exceptionally the Administration may dispense with one of the means of escape, due regard being paid to the nature and location of spaces and to the numbers of persons who normally might be quartered or employed there.

.4 No dead-end corridors having a length of more than 7 m shall be accepted. A dead-end corridor is a corridor or part of a corridor from which there is only one escape route.

.5 The width and continuity of the means of escape shall be to the satisfaction of the Administration.

.6 In a radiotelegraph station has no direct access to the open deck, two means of access to or egress from such station shall be provided, one of which may be a porthole or window of sufficient size or other means to the satisfaction of the Administration, to provide an emergency escape.

2. In all ro/ro cargo spaces where the crew is normally employed the number and locations of escape routes to the open deck shall be to the satisfaction of the Administration, but shall in no case be less than two and shall be widely separated.

3 Except as provided in paragraph 4, two means of escape shall be provided from each machinery space of category A. In particular, one of the following provisions shall be complied with: .1 two sets of steel ladders as widely separated as possible leading to doors in the upper part of the space similarly separated and from which access is provided to the open deck. In general, one of these ladders shall provide continuous fire shelter from the lower part of the space to a safe position outside the space. However, the Administration may not require the shelter if, due to the special arrangement or dimensions of the machinery space, a safe escape route from the lower part of this space is provided. This shelter shall be of steel, insulated, where necessary, to the satisfaction of the Administration and be provided with a self-closing steel door at the lower end; or .2 one steel ladder leading to a door in the upper part of the space from which access is provided to the open deck and additionally, in the lower part of the space and in a position well separated from the ladder referred to, a steel door capable of being operated from each side and which provides access to a safe escape route from the lower part of the space to the open deck.

4 In a ship of less than 1,000 tons gross tonnage, the Administration may dispense with one of the means of escape required under paragraph 3, due regard being paid to the dimension and disposition of the upper part of the space.

5 From machinery spaces other than those of category A, escape routes shall be provided to the satisfaction of the Administration having regard to the nature and location of the space and whether persons are normally employed in that space.

6 Lifts shall not be considered as forming one of the required means of escape as required by this Regulation.

Regulation 46 Protection of stairways and lift trunks in accommo-dation spaces, service spaces and control stations 1 Stairways which penetrate only a single deck shall be protected at least at one level by at least "B-0" class divisions and self-closing doors. Lifts which penetrate only a single deck shall be surrounded by "A-0" class divisions with steel doors at both levels. Stairways and lift trunks which penetrate more than a single deck shall be surrounded by at least "A-0" class divisions and be protected by self-closing doors at all levels.

2 On ships having accommodation for 12 persons or less, where stairways penetrate more than a single deck and where there are at least two escape routes direct to the open deck at every accommodation level, consideration may be given by the Administration to reducing the "A-0" requirements of paragraph 1 to "B-0".

3 All stairways shall be of steel frame construction except where the Administration sanctions the use of other equivalent material.

Regulation 47 Doors in fire resisting divisions 1 The fire resistance of doors shall, as far as practicable, be equivalent to that of the division in which they are fitted. Doors and door frames in "A" class divisions shall be constructed of steel. Doors in "B" class divisions shall be non-combustible. Doors fitted in boundary bulkheads of machinery spaces of category A shall be reasonably gastight and self-closing. In ships constructed according to method IC, an Administration may permit the use of combustible materials in doors separating cabins from individual interior sanitary accommodation such as showers.

2 Doors required to be self-closing shall not be fitted with hold-back hooks. However, hold-back arrangements fitted with remote release devices of the fail-safe type may be utilized.

3 In corridor bulkheads ventilation openings may be permitted only in and under the doors of cabins and public spaces. The openings shall be provided only in the lower half of a door. Where such opening is in or under a door the total net area of any such opening or openings shall not exceed 0.05 square m . When such opening is cut in a door it shall be fitted with a grille made of non-combustible material.

4 Watertight doors need not be insulated.

Regulation 48 Ventilation systems The ventilation systems of cargo ships shall be in compliance with the provisions of Regulation 16, except paragraph 8.

Regulation 49 Restricted use of combustible materials 1 All exposed surfaces in corridors and stairway enclosures and surfaces including grounds in concealed or inaccessible spaces in accommodation and service spaces and control stations shall have low flame-spread characteristics. * Exposed surfaces of ceilings in accommodation and service spaces and control stations shall have low flame-spread characteristics.

[* Reference is made to Guidelines on the Evaluation of Fire Hazard Properties of Materials, adopted by the Organization by resolution A. 166 (ES.IV).] 2 Paints, varnishes and other finishes used on exposed interior surfaces shall not offer an undue fire hazard in the judgement of the Administration and shall not be capable of producing excessive quantities of smoke.

3 Primary deck coverings, if applied, in accommodation and service spaces and control stations shall be of an approved material which will not readily ignite.* [* Reference is made to Improved Provisional Guidelines on Test Procedures for Primary Deck Coverings, adopted by the Organization by resolution A.214 (VII).] Regulation 50 Details of construction 1 Method IC-In accommodation and service spaces and control stations all linings, draught stops, ceilings and their associated grounds shall be of non-combustible materials.

2 Methods IIC and IIIC-In corridors and stairway enclosures serving accommodation and service spaces and control stations, ceilings, linings, draught stops and their associated grounds shall be of non-combustible materials.

3 Methods IC, IIC and IIIC 3.1 Except in cargo spaces or refrigerated compartments of service spaces, insulating materials shall be non-combustible. Vapour barriers and adhesives used in conjunction with insulation, as well as the insulation of pipe fittings, for cold service systems, need not be of non-combustible materials, but they shall be kept to the minimum quantity practicable and their exposed surfaces shall have qualities of resistance to the propagation of flame to the satisfaction of the Administration.

3.2 Where non-combustible bulkheads, linings and ceilings are fitted in accommodation and service spaces they may have a combustible veneer not exceeding 2.0 mm in thickness within any such space except corridors, stairway enclosures and control stations, where the veneer shall not exceed 1.5 mm in thickness.

3.3 Air spaces enclosed behind ceilings, panellings, or linings, shall be divided by close-fitting draught stops spaced not more than 14 m apart.

In the vertical direction, such air spaces, including those behind linings of stairways, trunks, etc., shall be closed at each deck.

Regulation 51 Arrangements for gaseous fuel for domestic purposes Where gaseous fuel is used for domestic purposes the arrangements, storage, distribution and utilization of the fuel shall be such that, having regard to the hazards of fire and explosion which the use of such fuel may entail, the safety of the ship and the persons on board is preserved.

Regulation 52 Fixed fire detection and fire alarm systems, Automa-tic sprinkler, fire detection and fire alarm systems 1 In ships in which method IC is adopted, a smoke detection system in accordance with the relevant provisions of Regulation 13 shall be so installed and arranged as to protect all corridors, stairways and escape routes within accommodation spaces.

2 In ships in which method IIC is adopted, an automatic sprinkler, fire detection and fire alarm system of an approved type and complying with the relevant provisions of Regulation 12 shall be so installed and arranged as to protect accommodation spaces, galleys and other service spaces, except spaces which afford no substantial fire risk such as void spaces, sanitary spaces, etc. In addition, a smoke detection system in accordance with the relevant provisions of Regulation 13 shall be so arranged and installed as to protect corridors, stairways and escape routes within accommodation spaces.

3 In ships in which method IIIC is adopted, a fixed fire detection and fire alarm system of an approved type and complying with the relevant provisions of Regulation 13 shall be so installed and arranged as to detect the presence of fire in all accommodation spaces and service spaces, except spaces which afford no substantial fire risk such as void spaces, sanitary spaces, etc.

4 Notwithstanding the provisions of the above, the Administration need not require the installation of detectors required in accordance with the provisions of Regulation 13.2.2 until 1 September 1985.

Regulation 53 Fire protection arrangements in cargo spaces 1 General 1.1 Except for cargo spaces covered in paragraphs 2 and 3, cargo spaces of ships of 2,000 tons gross tonnage and upwards shall be protected by a fixed gas fire-extinguishing system complying with the provisions of Regulation 5 or by a fire-extinguishing system which gives equivalent protection.

1.2 The Administration may exempt from the requirements of paragraph 1.1 cargo spaces of any ship if constructed and solely intended for carrying ore, coal, grain, unseasoned timber and non-combustible cargoes or cargoes which, in the opinion of the Administration, constitute a low fire risk. Such exemptions may be granted only if the ship is fitted with steel hatch covers and effective means of closing all ventilators and other openings leading to the cargo spaces.

1.3 Notwithstanding the provisions of paragraph 1.1, any ship engaged in the carriage of dangerous goods shall be provided in any cargo spaces with a fixed gas fire-extinguishing system complying with the provisions of Regulation 5 or by a fire-extinguishing system which in the opinion of the Administration give equivalent protection for the cargoes carried.

2 Ro/ro cargo spaces 2.1 Fire detection There shall be provided an approved automatic fire detection and fire alarm system. The design and arrangements of this system shall be considered in conjunction with the ventilation requirements referred to in 2.3.

2.2 Fire-extinguishing arrangements 2.2.1 Ro/ro cargo spaces capable of being sealed shall be fitted with a fixed gas fire-extinguishing system which shall comply with the provisions of Regulation 5, except that: .1 if a carbon dioxide system is fitted, the quantity of gas available shall be at least sufficient to give a minimum volume of free gas equal to 45 per cent of the gross volume of the largest such cargo space which is capable of being sealed, and the arrangements shall be such as to ensure that at least two thirds of the gas required for the relevant space shall be introduced during 10 minutes; .2 a halogenated hydrocarbon system may be used only for spaces designated only for vehicles which are not carrying any cargo; .3 any other fixed gas fire-extinguishing system or fixed high expansion foam fire-extinguishing system may be fitted provided the Administration is satisfied that an equivalent protection is achieved; .4 as an alternative, a system meeting the requirements of Regulation 37.1.3 may be fitted. However, the drainage and pumping arrangement shall be such as to prevent the build-up of free surfaces. If this is not possible the adverse effect upon stability of the added weight and free surface of water shall be taken into account to the extent deemed necessary by the Administration in its approval of the stability information. * Such information shall be included in the stability information supplied to the master as required by Regulation II-1/22.

2.2.2 Ro/ro cargo spaces not capable of being sealed shall be fitted with a system meeting the requirements of Regulation 37.1.3. However, the drainage and pumping arrangements shall be such as to prevent the build-up of free surfaces. If this is not possible the adverse effect upon stability of the added weight and free surface of water shall be taken into account to the extent deemed necessary by the Administration in its approval of the stability information *. Such information shall be included in the stability information supplied to the master as required by Regulation II-1/22.

[* Reference is made to Recommendation on Fixed Fire-Extinguishing Systems for Special Category Spaces, adopted by the Organization by resolution A. 123(V).] 2.2.3 There shall be provided for use in any ro/ro cargo space such number of portable fire extinguishers as the Administration may deem sufficient. At least one portable extinguisher shall be located at each access to such a cargo space.

2.2.4 Each ro/ro cargo space intended for the carriage of motor vehicles with fuel in their tanks for their own propulsion shall be provided with: .1 at least three water fog applicators; .2 one portable foam applicator unit complying with the provisions of Regulation 6.4 provided that at least two such units are available in the ship for use in such ro/ro cargo spaces.

2.3 Ventilation system 2.3.1 Closed ro/ro cargo spaces shall be provided with an effective power ventilation system sufficient to provide at least six air changes per hour based on an empty hold. Ventilation fans shall normally be run continuously whenever vehicles are on board. Where this is impracticable, they shall be operated for a limited period daily as weather permits and in any case for a reasonable period prior to discharge, after which period the ro/ro cargo space shall be proved gas free. One or more portable combustible gas detecting instruments shall be carried for this purpose.

The system shall be entirely separate from other ventilating systems.

Ventilation ducts serving ro/ro cargo spaces capable of being effectively sealed shall be separated for each cargo space. The Administration may require an increased number of air changes when vehicles are being loaded or unloaded. The system shall be capable of being controlled from a position outside such spaces.

2.3.2 The ventilation shall be so arranged as to prevent air stratification and the formation of air pockets.

2.3.3 Means shall be provided to indicate any loss of the required ventilating capacity on the navigating bridge.

2.3.4 Arrangements shall be provided to permit a rapid shut-down and effective closure of the ventilation system in case of fire, taking into account the weather and sea conditions.

2.3.5 Ventilation ducts, including dampers, shall be made of steel and their arrangement shall be to the satisfaction of the Administration.

2.4 Precautions against ignition of flammable vapours Closed ro/ro cargo spaces carrying motor vehicles with fuel in their tanks for their own propulsion shall comply with the following additional provisions: .1 Except as provided in paragraph 2.4.2, electrical equipment and wiring shall be of a type suitable for use in explosive petrol and air mixtures.

.2 Above a height of 450 mm from the deck, electrical equipment of a type so enclosed and protected as to prevent the escape of sparks shall be permitted as an alternative on condition that the ventilating system is so designed and operated as to provide continuous ventilation of the cargo spaces at the rate of at least ten air changes per hour whenever vehicles are on board.

.3 Other equipment which may constitute a source of ignition of flammable vapours shall not be permitted.

.4 Electrical equipment and wiring in an exhaust ventilation duct shall be of a type approved for use in explosive petrol and air mixtures and the outlet from any exhaust duct shall be sited in a safe position, having regard to other possible sources of ignition.

.5 Scuppers shall not be led to machinery or other spaces where sources of ignition may be present.

3 Cargo spaces, other than ro/ro cargo spaces, intended for the carriage of motor vehicles with fuel in their tanks for their own propulsion Spaces intended for the carriage of motor vehicles with fuel in their tanks for their own propulsion shall comply with requirements of paragraph 2, except that paragraph 2.2.4 need not be complied with.

Regulation 54 Special requirements for ships carrying dangerousgoods 1 General 1.1 In addition to complying with the requirements of Regulation 53 for cargo ships and with the requirements of Regulations 38 and 39 for passenger ships as appropriate, ship types and cargo spaces, referred to in paragraph 1.2, intended for the carriage of dangerous goods shall comply with the requirements of this Regulation, as appropriate, except when carrying dangerous goods in limited quantities* unless such requirements have already been met by compliance with the requirements elsewhere in this Chapter. The types of ships and modes of carriage of dangerous goods are referred to in paragraph 1.2 and in table 54.1, where the numbers appearing in paragraph 1.2 are referred to in the top line.

[* Reference is made to Section 18 of the General Introduction to the International Maritime Dangerous Goods Code (the IMDG Code) for a definition of the term "limited quantities".] 1.2 The following ship types and cargo spaces shall govern the application of tables 54.1 and 54.2: .1 Ships and cargo spaces not specifically designed for the carriage of freight containers but intended for the carriage of dangerous goods in packaged form including goods in freight containers and portable tanks.

.2 Purpose built container ships and cargo spaces intended for the carriage of dangerous goods in freight containers and portable tanks.

.3 Ro/ro ships and ro/ro cargo spaces intended for the carriage of dangerous goods.

.4 Ships and cargo spaces intended for the carriage of solid dangerous goods in bulk.

.5 Ships and cargo spaces intended for carriage of dangerous goods other than liquids and gases in bulk in shipborne barges.

2 Special requirements Unless otherwise specified the following requirements shall govern the application of table 54.1, 54.2 and 54.3 to both "on deck" and "under deck" stowage of dangerous goods where the numbers of the following paragraphs are indicated in the first column.

2.1 Water supplies 2.1.1 Arrangements shall be made to ensure immediate availability of a supply of water from the fire main at the required pressure either by permanent pressurization or by suitably placed remote starting arrangements for the fire pumps.

2.1.2 The quantity of water delivered shall be capable of supplying four nozzles of a size and at pressures as specified in Regulation 4, capable of being trained on any part of the cargo space when empty. This amount of water may be applied by equivalent means to the satisfaction of the Administration.

2.1.3 Means of effectively cooling the designated under deck cargo space by copious quantities of water, either by a fixed arrangement of spraying nozzles, or flooding the cargo space with water, shall be provided. Hoses may be used for this purpose in small cargo spaces and in small areas of larger cargo spaces at the discretion of the Administration. In any event the drainage and pumping arrangements shall be such as to prevent the build-up of free surfaces. If this is not possible the adverse effect upon stability of the added weight and free surface of water shall be taken into account to the extent deemed necessary by the Administration in its approval of the stability information.* [* Reference is made to Recommendation on Fixed Fire-Extinguishing Systems for Special Category Spaces, adopted by the Organization by resolution A. 123(V).] 2.1.4 Provision to flood a designated under deck cargo space with suitable specified media may be substituted for the requirements in paragraph 2.1.3.

2.2 Sources of ignition Electrical equipment and wiring shall not be fitted in enclosed cargo spaces, closed vehicle TABLE 54.1-APPLICATION OF THE REQUIREMENTS TO DIFFERENT MODES OFCARRIAGE OF DANGEROUS GOODS IN SHIPS AND CARGO SPACES Wherever "x" appears in table 54.1 it means that this requirement is applicable to all classes of dangerous goods as given in the appropriate line of table 54.3, except as indicated by the notes.

Regulation |----|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | \ 54.2 | | | .2 | .3 | | .5 | | .7 | .8 | .9 | | \ | | | | | | | | | \ | | | | | | | | | \ | | | | | | | | | \ | | | | | | | | | \ | | | | | | | | | 54.1.2 \ | .1.1| .1.2| .1.3| .1.4| | .4.1| .4.2| .6.1| .6.2| | |----|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | Not | | | | | | | | |1 specifically | X | X | X | X | X | X | X | X | X | X | X | X | X | - | | designed | | | | | | | | |----|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | Container | | | | a | a | | | b | |2 cargo | X | X | X | X | X | X | X | X | X | X | X | - | X | - | | spaces | | | | | | | | |----|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | | | | | | | | c | |Closed ro/ro | X | X | X | X | X | X | X | X | X | X | X | - | X | X | |cargo spaces | | | | | | | | |-----|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | | | | | | | | | |opened ro/ro | X | X | X | X | X | - | - | - | - | X | X | X | X | X | |3 |cargo spaces | | | | | | | | |-----|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | | | | | | | | | |Weather | X | X | - | - | - | - | - | - | - | X | X | X | X | - | |decks | | | | | | | | |----|----------------------| | Solid dang- | For application of requirements of Regulation 54 to different | |4 rous goods | | in bulk | classes of dangerous goods - see Table 54.2 | |----|----------------------| | Shipborne | | | d | d | d | d | | | | |5 | X | - | X | X | X | X | X | X | - | - | - | - | - | - | | Barges | | | | | | | | |----|---|---|---|---|---|---|---|---|---|---|---|---|---|---| Notes a) For classes 4 and 5.1 not applicable to closed freight containers.

For classes 2,3,6.1 and 8 when carried in closed freight containers the ventilation rate may be reduced to not less than two air changes. For the purpose of this requirement a portable tank is a closed freight container.

b) Applicable to decks only.

c) Applies only to closed ro/ro cargo spaces, not capable of being sealed.

d) In the special case where the barges are capable of containing flammable vapours or alternatively if they are capable of discharging flammable vapours to a safe space outside the barge carrier compartment by means of ventilation ducts connected to the barges, these requirements may be reduced or waived to the satisfaction of the Administration.

TABLE 54.2-APPLICATION OF THE REQUIREMENTS TO DIFFERENT CLASSES OFDANGEROUS GOODS FOR SHIPS AND CARGO SPACES CARRYING SOLID DANGEROUS GOODSIN BULK |----------------------------- | Class- | | | | | Chapter VII | | f | | | | 4.1 | 4.2 | 4.3 | 5.1 | 6.1 | 8 | 9 | | Regulation 54.2 | | | | |--------|---|---|---|---|---|---|---| | | | | | | | | g | g | | .1.1 | X | X | - | X | X | X | X | | | | | | |--------|---|---|---|---|---|---|---| | | | | | | e | | | | | .1.2 | X | X | - | X | - | - | X | | | | | | |--------|---|---|---|---|---|---|---| | | | | | | | g | g | | g | | .2 | X | X | X | X | - | - | X | | | | | | |--------|---|---|---|---|---|---|---| | | | | | | h | g | g | g | | g | | .4.1 | X | X | X | X | - | - | X | | | | | | |--------|---|---|---|---|---|---|---| | | | | | | h | g | g | | g | | .4.2 | X | X | X | X | - | - | X | | | | | | |--------|---|---|---|---|---|---|---| | | | | | | .6 | X | X | X | X | X | X | X | | | | | | |--------|---|---|---|---|---|---|---| | | | | | | | | g | g | g | | .8 | X | X | X | X | X | X | X | | | | | | |----------------------------- Notes e) This requirement is applicable when the characteristics of the substance call for large quantities of water for fire fighting.

f) The hazards of substances in this class which may be carried in bulk are such that special consideration must be given by the Administration to the construction and equipment of the ships involved in addition to those enumerated in this table.

g) Reference is made to the International Maritime Dangerous Goods Code (resolution A.81 (IV) as amended) or the Code of Safe Practice for Solid Bulk Cargoes (resolution A.434 (XI) as amended), as appropriate.

h) At least natural ventilation is required in enclosed cargo spaces intended for carriage of solid dangerous goods in bulk. In cases where power ventilation is required in the Code of Safe Practice for Solid Bulk Cargoes (resolution A.434 (XI) as amended), the use of portable ventilation units (equipment) to the satisfaction of the Administration may suffice.

TABLE 54.3-APPLICATION OF THE REQUIREMENTS TO DIFFERENT CLASSES OFDANGEROUS GOODS EXCEPT SOLID DANGEROUS GOODS IN BULK |------------------------------- | Class- | | | | | | Chapter VII | | | | | | 1 | 2 | 3 | 4 | 5.1 | 5.2 | 6.1 | 8 | | Regulation 54.2 | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | | | p | p | | | .1.1 | X | X | X | X | X | X | X | X | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | i | | p | p | | | .1.2 | X | X | X | X | X | X | - | - | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | k | | | | | .1.3 | X | - | - | - | - | - | - | - | | | | | | |--------|---|---|---|---|---|---|---|---| |------------------------------- | | | | | | k | | | | | .1.4 | X | - | - | - | - | - | - | - | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | k | l | m | | m | m | | .2 | X | X | X | - | - | - | X | X | | | | | p | p | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | .3 | X | X | X | X | X | - | X | X | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | | i | m | p | p | m | m | | .4.1 | - | X | X | X | X | - | X | X | | | | | p | p | | | | | | |------------------------------- |--------|---|---|---|---|---|---|---|---| | | | | | | | l | m | | m | m | | .4.2 | - | X | X | - | - | - | X | X | | | | | p | p | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | | m | | n | m | | .5 | - | - | X | - | - | - | X | X | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | | | | p | | | .6 | - | X | X | X | X | X | X | X | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | | | | p | p | p | | .7 | - | - | X | X | X | X | X | X | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | k | | p | p | p | | .8 | X | X | X | X | X | - | X | X | | o | | | | | | | | | |--------|---|---|---|---|---|---|---|---| | | | | | | | m | p | | m | m | | .9 | X | X | X | X | X | - | X | X | | | | | | |------------------------------- Notes i) This requirement is applicable when the characteristics of the substance call for large quantities of water for fire fighting.

j) Applicable to flammable or poisonous gases k) Except goods of class 1 in division 1.4, compatibility group S.

l) All flammable gases.

m) All liquids having a flashpoint below 23 ”ę (closed cup test).

n) Liquids only.

o) Goods of class 1 shall be stowed 3 m horizontally away from the machinery space boundaries in all cases.

p) Reference is made to the International Maritime Dangerous Goods Code (resolution A.81 (IV) as amended) or the Code of Safe Practice for Solid Bulk Cargoes (resolution A.434 (XI) as amended), as appropriate.

deck spaces unless it is essential for operational purposes in the opinion of the Administration. However, if electrical equipment is fitted in such spaces, it shall be of a certified safe type * for use in the dangerous environments to which it may be exposed unless it is possible to completely isolate the electrical system (by removal of links in the system, other than fuses). Cable penetrations of the decks and bulkheads shall be sealed against the passage of gas or vapour. Through runs of cables and cables within the cargo spaces shall be protected against damage from impact. Any other equipment which may constitute a source of ignition of flammable vapour shall not be permitted.

[* Reference is made to Recommendations published by the International Electrotechnical Commission and, in particular, Publication 92-Electrical Installations in Ships.] 2.3 Detection system An approved fire detection and fire alarm system shall be fitted to all enclosed cargo spaces including closed vehicle deck spaces. Where the detection system utilizes samples of atmosphere drawn from such cargo spaces provision shall be made to prevent, in the event of cargo leakage, the discharge of contaminated atmosphere through the sampling system into the space in which the detection apparatus is situated. A notice stating that the samples shall be discharged to the open air when cargoes giving off toxic fumes are being carried shall be permanently exhibited at the equipment.

2.4 Ventilation 2.4.1 Adequate power ventilation shall be provided in enclosed cargo spaces. The arrangement shall be such as to provide for at least six air changes per hour in the cargo space based on an empty cargo space and for removal of vapours from the upper or lower parts of the cargo space, as appropriate.

2.4.2 The fans shall be such as to avoid the possibility of ignition of flammable gas air mixtures. Suitable wire mesh guards shall be fitted over inlet and outlet ventilation openings.

2.5 Bilge pumping Where it is intended to carry flammable or toxic liquids in enclosed cargo spaces the bilge pumping system shall be designed to ensure against inadvertent pumping of such liquids through machinery space piping or pumps. Where large quantities of such liquids are carried, consideration shall be given to the provision of additional means of draining those cargo spaces. These means shall be to the satisfaction of the Administration.

2.6 Personnel protection 2.6.1 Four sets of full protective clothing resistant to chemical attack shall be provided in addition to the fireman's outfits required by Regulation 17. The protective clothing shall cover all skin, so that no part of the body is unprotected.

2.6.2 At least two self-contained breathing apparatuses additional to those required by Regulation 17 shall be provided.

2.7 Portable fire extinguishers Portable fire extinguishers with a total capacity of at least 12 kg of dry powder or equivalent shall be provided for the cargo spaces. These extinguishers shall be in addition to any portable fire extinguishers required elsewhere in this Chapter.

2.8 Insulation of machinery space boundaries Bulkheads forming boundaries between cargo spaces and machinery spaces of category A shall be insulated to "A-60" standard, unless the dangerous goods are stowed at least 3 m horizontally away from such bulkheads. Other boundaries between such spaces shall be insulated to "A-60" standard.

2.9 Water spray system Each open ro/ro cargo space having a deck above it and each space deemed to be a closed ro/ro cargo space not capable of being sealed shall be fitted with an approved fixed pressure water-spraying system for manual operation which shall protect all parts of any deck and vehicle platform in such space, except that the Administration may permit the use of any other fixed fire-extinguishing system that has been shown by full-scale test to be no less effective. In any event the drainage and pumping arrangements shall be such as to prevent the build-up of free surfaces. If this is not possible the adverse effect upon stability of the added weight and free surface of water shall be taken into account to the extent deemed necessary by the Administration in its approval of the stability information.* [* Reference is made to Recommendation on Fixed Fire-Extinguishing Systems for Special Category Spaces, adopted by the Organisation by resolution A.123(V).] 3 Document of compliance The Administration shall provide the ship with an appropriate document as evidence of compliance of construction and equipment with the requirements of this Regulation.

PART D FIRE SAFETY MEASURES FOR TANKERS (The requirements of this Part are additional to those of Part C except for Regulations 53 and 54 which do not apply to tankers and except as provided otherwise in Regulations 57 and 58) Regulation 55 Application 1 Unless expressly provided otherwise, this Part shall apply to tankers carrying crude oil and petroleum products having a flashpoint not exceeding 60”ę (closed cup test), as determined by an approved flashpoint apparatus, and a Reid vapour pressure which is below atmospheric pressure and other liquid products having a similar fire hazard.

2 Where liquid cargoes other than those referred to in paragraph 1 or liquefied gases which introduce additional fire hazards are intended to be carried, additional safety measures shall be required to the satisfaction of the Administration, having due regard to the provisions of the Bulk Chemical Code and the Gas Carrier Code.

3 This paragraph applies to all ships which are combination carriers.

Such ships shall not carry solid cargoes unless all cargo tanks are empty of oil and gas freed or unless the arrangements provided in each case are to the satisfaction of the Administration and in accordance with the relevant operational requirements contained in the Guidelines for Inert Gas Systems*.

[* Reference is made to Guidelines for Inert Gas Systems, adopted by the Maritime Safety Committee at its forty-second session in May 1980 (MSC/Circ. 282).] 4 Tankers carrying petroleum product having a flashpoint exceeding 60 ”ę (closed cup test) as determined by an approved flashpoint apparatus shall comply with the provisions of Part C, except that in lieu of the fixed fire-extinguishing system required in Regulation 53 they shall be fitted with a fixed deck foam system which shall comply with the provisions of Regulation 61.

5 The requirements for inert gas systems of Regulation 60 need not be applied to all chemical tankers or gas carriers when carrying cargoes described in paragraph 1, provided that alternative arrangements, to be developed by the Organization, are fitted.** [** Reference is made to Interim Regulation for Inert Gas Systems on Chemical Tankers Carrying Petroleum Products, adopted by the Orgnization by resolution A. 473 (XII).] 6 Chemical tankers and gas carriers shall comply with the requirements of this Part, except where alternative and supplementary arrangements are provided to the satisfaction of the Administration, having due regard to the provisions of the Bulk Chemical Code and the Gas Carrier Code.

Regulation 56 Location and separation of spaces 1 Machinery spaces of category A other than such spaces for bow thrusters and their associated equipment shall be positioned aft of cargo tanks and slop tanks; they shall also be situated aft of cargo pump rooms and cofferdams, but not necessarily aft of the oil fuel bunker tanks. Any machinery space of category A shall be isolated from cargo tanks and slop tanks by a cofferdam, a cargo pump room, or an oil fuel bunker tank.

However, the lower portion of the pump room may be recessed into machinery spaces of category A to accommodate pumps provided that the deckhead of the recess is in general not more than one third of the moulded depth above the keel except that in the case of ships of not more than 25,000 tonnes deadweight, where it can be demonstrated that for reasons of access and satisfactory piping arrangements this is impracticable, the Administration may permit a recess in excess of such height, but not exceeding one half of the moulded depth above the keel.

2 Accommodation spaces, main cargo control stations, control stations and service spaces (excluding isolated cargo handling gear lockers) shall be positioned aft of all cargo tanks, slop tanks, cargo pump rooms and cofferdams which isolate cargo or slop tanks from machinery spaces of category A. Any common bulkheads separating a cargo pump room, including the cargo pump room entrance, from accommodation and service spaces and control stations shall be constructed to "A-60" standard. Where deemed necessary, accommodation spaces, control stations, machinery spaces other than those of category A, and service spaces may be permitted forward of all cargo tanks, slop tanks, cargo pump rooms and cofferdams subject to an equivalent standard of safety and appropriate availability of fire-extinguishing arrangements being provided to the satisfaction of the Administration.

3 Where the fitting of a navigation position above the cargo tanks area is shown to be necessary it shall be for navigation purposes only and it shall be separated from the cargo tank deck by means of an open space with a height of at least 2 m. The fire protection of such navigation position shall in addition be as required for control spaces as set forth in Regulation 58.1 and 58.2 and other provisions, as applicable, of this Part.

4 Means shall be provided to keep deck spills away from the accommodation and service areas. This may be accomplished by provisions of a permanent continuous coaming of a suitable height extending from side to side. Special consideration shall be given to the arrangements associated with stern loading.

5 Exterior boundaries of superstructures and deckhouses enclosing accommodation and service spaces and including any overhanging decks which support such accommodation, shall be insulated to "A-60" standard for the whole of the portions which face cargo oil tanks and for 3 m aft of the front boundary. In the case of the sides of these superstructures and deckhouses, such insulation shall be carried as high as is deemed necessary by the Administration.

6.1 Entrances, air inlets and openings to accommodation spaces, service spaces and control stations shall not face the cargo area. They shall be located on the end bulkhead not facing the cargo area and/or on the outboard side of the superstructure or deckhouse at a distance of at least 25 per cent of the length of the ship but not less than 3 m from the end of the superstructure or deckhouse facing the cargo area. This distance, however, need not exceed 5 m.

6.2 No doors shall be permitted within the limits mentioned in paragraph 6.1, except that doors to those spaces not having access to accommodation spaces, service spaces and control stations, such as cargo control stations, provision rooms and store-rooms may be permitted by the Administration. Where such doors are fitted, the boundaries of the space shall be insulated to "A-60" standard. Bolted plates for removal of machinery may be fitted within the limits specified in paragraph 6.1.

Navigating bridge doors and wheelhouse windows may be located within the limits specified in paragraph 6.1 so long as they are so designed that a rapid and efficient gas and vapour tightening of the navigating bridge can be ensured.

6.3 Port lights facing the cargo area and on the sides of the superstructures and deckhouses within the limits specified in paragraph 6.1 shall be of the fixed (non-opening) type. Such port lights in the first tier on the main deck shall be fitted with inside covers of steel or other equivalent material.

Regulation 57 Structure, bulkheads within accommodation and ser-vice spaces and details of construction 1 For the application of the requirements of Regulations 42, 43 and 50 to tankers, only method IC as defined in Regulation 42.5.1 shall be used.

2 Skylights to cargo pump rooms shall be of steel, shall not contain any glass and shall be capable of being closed from outside the pump room.

Regulation 58 Fire integrity of bulkheads and decks 1 In lieu of Regulation 44 and in addition to complying with the specific provisions for fire integrity of bulkheads and decks mentioned elsewhere in this Part the minimum fire integrity of bulkheads and decks shall be as prescribed in tables 58.1 and 58.2.

2 The following requirements shall govern application of the tables: .1 Tables 58.1 and 58.2 shall apply respectively to the bulkhead and decks separating adjacent spaces.

.2 For determining the appropriate fire integrity standards to be applied to divisions between adjacent spaces, such spaces are classified according to their fire risk as shown in categories (1) to (10) below. The title of each category is intended to be typical rather than restrictive.

The number in parentheses preceding each category refers to the applicable column or row in the tables.

(1) Control stations Spaces containing emergency sources of power and lighting.

Wheelhouse and chartroom.

Spaces containing the ship's radio equipment.

Fire-extinguishing rooms, fire control rooms and fire-recording stations.

Control room for propulsion machinery when located outside the machinery space.

TABLE 58.1-FIRE INTEGRITY OF BULKHEADS SEPARATING ADJACENT SPACES |-------------------------------------- || | | | | | | Spaces || (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | || c | | | | | | Control stations (1) || A-0 | A-0 | A-60 | A-0 | A-15 | A-60 | A-15 | A-60 | A-60 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Corridors (2) || C | B-0 | B-0 | B-0 | A-60 | A-0 | A-60 | A-0 | * | || | a | | | | || | A-0 | | | | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Accommodation spaces (3) || | C | B-0 | B-0 | A-60 | A-0 | A-60 | A-0 | * | || | a | | | | || | A-0 | | | | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Stairways (4) || | B-0 | B-0 | A-60 | A-0 | A-60 | A-0 | * | || | a | a | | | || | A-0 | A-0 | | | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Service spaces (low risk) (5) || | | C | A-60 | A-0 | A-60 | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | || | | | d | | | Machinery spaces of category A (6) || | | * | A-0 | A-0 | A-60 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | || | | | b | | | Other machinery spaces (7) || | | | A-0 | A-0 | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Cargo pump rooms (8) || | | | * | A-60 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | || | | | | b | | Service spaces (high risk) (9) || | | | | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Open decks (10)|| | | | | - | || | | | | | |-------------------------------------- Notes: To be applied to tables 58.1 and 58.2, as appropriate.

a) For clarification as to which applies, see Regulations 43 and 46 of this Chapter.

b) Where spaces are of the same numerical category and superscript b appears, a bulkhead or deck of the rating shown in the tables is only required when the adjacent spaces are for a different purpose, e.g. in category (9). A galley next to a galley does not require a bulkhead but a galley next to a paint room requires an "A-0" bulkhead.

c) Bulkheads separating the wheelhouse, chartroom and radio room from each other may be "B-0" rating.

d) Bulkheads and decks between cargo pump rooms and machinery spaces of category A may be penetrated by cargo pump shaft glands and similar glanded penetrations, provided that gastight seals with efficient lubrication or other means of ensuring the permanence of the gas seal are fitted in way of the bulkhead or deck.

e) Fire insulation need not be fitted if the machinery space in category (7), in the opinion of the Administration, has little or no fire risk.

* Where an asterisk appears in the tables, the division is required to be of steel or other equivalent material but is not required to be of "A" class standard.

TABLE 58.2-FIRE INTEGRITY OF DECKS SEPARATING ADJACENT SPACES |-------------------------------------- || | | | | | | Space below”ż Space above”ś || (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Control stations (1) || A-0 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | - | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Corridors (2) || A-0 | * | * | A-0 | * | A-60 | A-0 | - | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Accommodation spaces (3) || A-60 | A-0 | * | A-0 | * | A-60 | A-0 | - | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Stairways (4) || A0 | A-0 | A-0 | * | A-0 | A-60 | A-0 | - | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Service spaces (low risk) (5) || A-15 | A-0 | A-0 | A-0 | * | A-60 | A-0 | - | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | || | | | e | | | Machinery spaces of category A (6) || A-60 | A-60 | A-60 | A-60 | A-60 | * | A-60 | A-0 | A-60 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Other machinery spaces (7) || A-15 | A-0 | A-0 | A-0 | A0 | A-0 | * | A-0 | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | || | | d | | | | Cargo pump rooms (8) || - | - | - | - | - | A-0 | A-0 | * | - | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | || | | | | b | | Service spaces (high risk) (9) || A-60 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | - | A-0 | * | || | | | | | |----------||---|---|---|---|---|---|---|---|---|---| || | | | | | | Open decks (10)|| * | * | * | * | * | * | * | * | * | - | || | | | | | |-------------------------------------- Spaces contain centralized fire alarm equipment.

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