interpretation solas 2005

8/17/2019 Interpretation Solas 2005

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INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES

Interpretationsof the

International Convention

for the Safety of Life at Sea, 1974

and its Amendments

IACS Int. 2004


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CONTENTS AND STATUSInterpretation Reference* Adopted Submitted to IMO R

by IACS IMO Approval

SC1 Main source of electrical power Ch. II-1 Reg. 41.1 1985/Rev.1 June 2002(81)

SC2 Main source of electrical power Ch. II-1 Reg. 41.1.2 Deleted Jul 2003

(81)

SC3 Emergency source of electrical power Ch. II-1 Reg. 42.1.4 & 1985/Rev. 1 May 199943.1.4(81)

SC4 Emergency source of electrical power Ch. II-1 Reg. 42.2.3.1 & 198543.2.4.1(81)

SC5 Emergency source of electrical Ch. II-1 Reg. 42.2.3.1 1985power in passenger ships (81)

SC6 Emergency source of electrical Ch. II-1 Reg. 43.6 1985power in cargo ships (81)

SC7 Precautions against shock, fire and Ch. II-1 Reg. 45.2 1985other hazards of electrical origin (81)

SC8 Precautions against shock, fire and Ch. II-1 Reg. 45.3.3 1985other hazards of electrical origin (81)


SC10 Precautions against shock, fire and Ch. II-1 Reg. 45.5.2 1985/Rev 2. May 2001other hazards of electrical origin (81)




*Number in brackets: Year of adoption of the SOLAS Amendment for which the interpretation is valid

I A

C S

I n t .1 9 8 5 / R ev2 0 0 3


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Interpretation Reference* Adopted Submitted to IMO Rby IACS IMO Approval

SC14 Special requirements for machinery, Ch. II-1 Reg. 53.3 1985boilers and electrical installations (81)

SC15 Definitions Ch. II-2 Reg. 3.19 1985(81)



SC18 Fire pumps, fire mains Ch. II-2 Reg. 4.3.1.3 1985hydrants and hoses (81)

SC19 Fire pumps, fire mains Ch. II-2 Reg. 4.3.3.2 1985/Rev. 1 1996hydrants and hoses (81)

SC20 Fire pumps, fire mains Ch. II-2 Reg. 4.3.3.2.1 1985hydrants and hoses (81)

SC21 Fire pumps, fire mains Ch. II-2 Reg. 4.3.3.2.5 1985/Rev. 1 1996hydrants and hoses (81)

SC22 Fire pumps, fire mains Ch. II-2 Reg. 4.3.3.2.7 1985hydrants and hoses (81)

SC23 Fire pumps, fire mains Ch. II-2 Reg. 4.3.4.1 1985hydrants and hoses (81)

SC24 Fire pumps, fire mains Ch. II-2 Reg. 4.4.2 1985hydrants and hoses (81)

SC25 Fixed gas fire-extinguishing systems Ch. II-2 Reg. 5.1.6 1985, Corr./Rev.1 June 2000(81)

SC26 Deleted 1996

SC27 Deleted 1996

SC28 Deleted 1996


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SC29 Deleted 1996

SC30 Fire-extinguishing arrangements Ch. II-2 Reg. 7.1.2,1985/ Rev. 1 June 2000in machinery spaces 7.1.3, 7.2.2

and 7.2.3(81)

SC31 Fire-extinguishing arrangements Ch. II-2 Reg. 7.5 1985in machinery spaces (81)

SC32 Fixed high expansion foam Ch. II-2 Reg. 9 1985fire-extinguishing system (81)

SC33 Special arrangements in Ch. II-2 Reg. 11.2.2 1985machinery spaces (81)

SC34 Automatic sprinkler, fire detection Ch. II-2 Reg. 12.3 1985and fire alarm system (81)

SC35 Fixed fire detection and Ch. II-2 Reg. 13.1.3 1985fire alarm system (81)

SC36 Arrangements for oil fuel, lubricating Ch. II-2 Reg. 15.2.5 1985oil and other flammable oils (81)

SC37 Arrangements for oil fuel, lubricating Ch. II-2 Reg. 15.2.8 1985oil and other flammable oils (81)

SC38 Arrangements for oil fuel, lubricating Ch. II-2 Reg. 15.3 1985oil and other flammable oils (81)

SC39 Ventilation systems in ships other Ch. II-2 Reg. 16.6 1985than passenger ships carrying (81)more than 36 passengers

SC40 Means of escape Ch. II-2 Reg. 28.3.1.1.1 1985(81)

SC41 Means of escape Ch. II-2 Reg. 28.3.2 1985(81)

SC42 Fire protection arrangements in Ch. II-2 Reg. 37.2.2.1 1985cargo spaces incl. special and 53.2.4.2)category spaces (81)


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SC43 Fire protection arrangements in cargo Ch. II-2Reg. 37.2.2.1, 1985spaces incl. special category spaces 2.2.2, (3.2.1),

3.2.2, 38.(4.1),4.2, 53.(2.4.1),

2.4.4(81)

SC44 Bulkheads within accommodation Ch. II-2Reg. 42.4 1974and service spaces (81)

SC45 Fire integrity of bulkheads and Ch. II-2Reg. 44 1985decks (81)

SC46 Protection of stairways and lift Ch. II-2Reg. 46.1 1985trunks in accommodation spaces, (81)service spaces and control stations

SC47 Restricted use of combustible Ch. II-2Reg. 49 1985materials (81)

SC48 Fire protection arrangements in Ch. II-2 Reg. 53.1.2 1985

cargo spaces (81)

SC49 Fire protection arrangements in Ch. II-2 Reg. 53.1.3 1985cargo spaces (81)

SC50 Special requirements for ships Ch. II-2 Reg. 54.2.1.3 1985carrying dangerous goods (81)



SC53 Special requirements for ships Ch. II-2Reg. 54.2.51985 cancelled/1993carrying dangerous goods (81)

SC54 Location and separation of spaces Ch. II-2 Reg. 56 1985/Rev 1 1997(81)

SC55 Location and separation of spaces Ch. II-2Reg. 56.6.21985(81)


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Interpretation Reference* Adopted Submitted to IMO by IACS IMO Approval

SC56 Venting, purging, gas freeing and Ch. II-2 Reg. 59.1.9.3 & 1985ventilation 59.1.9.4

(81)

SC57 Venting, purging, gas freeing and Ch. II-2 Reg. 59.1.9.3 & 1985ventilation 59.1.9.4

(81)

SC58 Venting, purging, gas freeing and Ch. II-2 Reg. 59.2 1985ventilation (81)

SC59 Cargo tank protection Ch. II-2 Reg. 60.6 1985(81)

SC60 Fixed deck foam systems Ch. II-2 Reg. 61.5 1985(81)

SC61 Fixed deck foam systems Ch. II-2 Reg. 61.10 1985/Rev.1 1994(81)

SC62 Inert gas systems Ch. II-2 Reg. 62.13.4 198518.2(81)

SC63 Pre-discharge alarm of fixed gas fire Ch. II-2 Reg. 51.6 1985extinguishing systems (81)

SC64 Fire dampers in ventilation ducts Ch. II-2 Reg. 16.2 1985(81)

SC65 Ventilation ducts for galley Ch. II-2 Reg. 16.3 1985(81)

SC66 Integrity of emergency generator Ch. II-2 Reg. 44 1985space Table 44.1

(81)

SC67 Doors in fire-resisting corridor Ch. II-2 Reg. 47.3 1985

bulkheads of cargo ships (81)

SC68 Cofferdams adjacent to slop tanks of Ch. II-2 Reg. 56.4.1 1985combination carriers (81)

SC69 Arrangement for pumping of slops Ch. II-2 Reg. 56.4.2 1985in combination carriers in dry (81)cargo mode


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Interpretation Reference* Adopted Submitted to IMby IACS IMO A

SC81 Drainage of enclosed spaces situated Ch. II-1 Reg. 21.1.6.1 1993on the bulkhead deck (89)

SC82 Protection against noise Ch. II-1 Reg. 36 1993(81)

SC83 Continuity of the supply when Ch. II-1 Reg. 41.1.5 1993

transformers constitutes an (81)essential part of the electricalsupply system

SC84 Purpose built container space Ch. II-2 Reg. 54.1.2.2 1993(81)

SC85 Ro-ro Cargo Space Ch. II-2 Reg. 54.1.2.3 1993(81)

SC86 Weather Decks Ch. II-2 Reg. 54 Table 54.1 1993(81)

SC87 Certification of carriage Ch. II-2 Reg. 54.3 1993of solid dangerous bulk cargoes (81)

SC88 Fire water supply capacity Ch. II-2 Reg. 54.2.1 1993(81)

SC89 Ventilation of Cargo spaces Ch. II-2 Reg. 54.2.4 1993/Rev. 1 1996(81)

SC90 Bilge Drainage Ch. II-2 Reg. 54.2.5 1993(81)

SC91 Personal Protection - Ch. II-2 Reg. 54.2.6.1 1993Protective Clothing (81)

SC92 Personal Protection - Ch. II-2 Reg. 54 2.6.2 1993Self-contained breathing Apparatus (81)


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Interpretation Reference* Adopted Submitted to IMO by IACS IMO Approval

SC93Enclosure of stern tubes on cargo CH. II-1 Reg. 11.9 1994ships

SC94 Mechanical and electricalindependency of electric steering control

systems for steering gears CH. II-1 Reg. 29 1994

SC95 Communication between navigatingbridge and machinery space CH. II-1 Reg. 37 1994

SC96 Capacity of an emergency fire pump CH. II-2 Reg. 4.3.3.3.1 Rev.1 2001

SC97 Connection of a pump to fire main CH.II-2 Reg. 4.3.3.4 1994/Rev.1 June 2002

SC98 Fire hose nozzles of a plastic typematerial CH. II-2 Reg. 4.8 1994

SC99 Flexible bellows of combustiblematerials CH. II-2 Reg. 16.1 1994

SC100 Closing appliances of ventilationinlets and outlets CH. II-2 Reg. 16.9 1994

SC101 Main vertical zones CH. II-2 Reg. 24 1994

SC102 Cold Service CH. II-2 Reg. 34.2 1994

SC103 Insulation of machinery spaceboundaries CH. II-2 Reg. 54.2.8 1994

SC104 Quick closing valve for emergencygenerator fuel tank CH. II-2 Reg. 15.2.5 1995 1995 FP40

SC105Relief valve in oil filling lines CH. II-2 Reg. 15.2.7 1995 1995 FP40

SC106Galley exhaust duct CH. II-2 Reg. 16.7 1995 1995 FP40SC107Continuous ceiling CH. II-2 Reg. 25.3 1995 1995 FP40

SC108Galley exhaust duct CH. II-2 Reg. 32.1.9 1995 1995 FP40


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Interpretation Reference* Adopted Submitted to IMORemarks

by IACS IMO Approval

SC109 Open Top Container Holds - Water supplies CH. II-2 Reg. 54.2.1 1995 1995 FP40

SC110 Open Top Container Holds -Ventilation CH. II-2 Reg. 54.2.4 1995 1995 FP40

SC111 Open Top Container Holds -Bilge pumping CH. II-2 Reg. 54.2.5 1995 1995 FP40

SC112 Deleted January 2002

SC113 Emergency Towing Arrangements on Tankers Res. MSC 35 (63)2.10) 1996 1996 MSC 66Prototype Test

SC114 Emergency Fire Pump Access Reg. 4.3.3.2.9 1996

SC115 Fire detection system with remotely andindividually identifiable detectors Reg. 13.1.4 1996

SC116 Fire detection system with remotely and

individually identifiable detectors Reg. 13.1.10 1996

SC117 Fire detection system with remotely andindividually identifiable detectors Reg. 13.1.15 1996

SC118 Exhaust duct from galley ranges Reg. 16.7 1996

SC119 Balancing ducts Reg. 31 & 47 1996

SC120 Access to forecastle spaces on tankers Reg. 56 1996

SC121 Fire Pump Isolation Requirements Reg. 4.6.3 1997

SC 122 Corrosion Prevention in Seawater Ballast Tanks CH.II-1 Reg. 3-2 V. 0.1 April, 1988

SC 123 Machinery Installations - Service Tank Arrangements Reg. II-1/26.11 1998/Rev. 2 June 2002

SC124 Emergency Source of Power in Passenger and Cargo Ships Reg. II-1/42.3.4and II-1/43.3.4 May, 1999/Rev.1 June 2002


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I A CS

I nt .1 9 9 9 / Rev.2 0 0 4

Interpretation Reference* Adopted Submitted to IMORemarks

by IACS IMO Approva

SC125 B and C Class Divisions Reg. II-2/3 May 1998

SC126 Firse Protection Materials for Cargo Ships May, 1998/Rev. 1 June 2000

SC 127 Paint Reg. II-2/34.7 and 49.2 May, 1998

SC 128 CO2 Discharge Time Reg. II-2/5.2.4,Reg. II-2/38.2.1,Reg. II-2/53.2.2.1 May, 1998

SC 129 Fire Detection in Unmanned Machinery Spaces Reg. II-2/14 May, 1998

SC 130 Fire Detection and Sprinkler Systems inRefrigerated Chambers and similar spaces Reg. II-2/36.2,

Reg. II-2/41.2.2 and .5 May, 1998

SC 131 Liquid Cargoes for which regular foam is not Reg. II-2/55.2 May, 1998,effective for Fire Fighting Corr. June 1999

SC 132 Release Operation of the CO2 System Reg. II-2/5.2.5 May, 1998

SC 133 Oil Mist Detector on High Speed Engines - Chapter I-1, Reg. 47.2 May, 1998“equivalent device”

SC 134 Essential Services & Arrangements of sources Chapter II-1, Reg.40.1.1, /June 2002of Power, Supply, Control & Monitoring to the 40.1.2, 41.1.2 and 41.1.3different categories of Essential Services(SOLAS Reg. II-1/40 & 41)

SC 135 Escape Route or Low Location Lighting (LLL) Chapter II-2,b May 1998,Reg. 28.1.10 Rev. 1 June 1999

SC 136 Connecting means by which the main busbars of the main source of 1999/Corr.1 Jan 2004electrical power are normally connected

SC 137 Definition of High Speed Craft April, 1998

SC 138 Safe Access to Tanker Bows May, 1998

SC 139 Navigation Bridge Visibility Rev. 1 Dec 2003

SC 140 Secondary means of venting cargo tanks (Reg. II-2/59.1.2.3) October, 1998Rev.1 June 1999


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Remarks Interpretation Reference* Adopted Submitted to IMOby IACS IMO Approval

SC 141 Information on compliance with requirements Ch.XII, Reg.8.3 Deleted 1999 MSC 71 Res MSC.89(71)for bulk carriers - “triangle” to be marked on abulk carrier

SC 142 Deleted - January 2000

SC 143 Stowage of Marine Evacuation Systems Ch.III, Reg.15 1999

SC 144 Periodic Servicing of Launching Appliances Ch.III, Reg.20.11 1999/ 2000 DE43and on-load Releasing Gear Rev. 1 Nov 1999

SC 145 Public Address System LSA Code, para. 7.2.2 1998 1999 DE42

SC 146 Fire hose couplings and nozzles May 1999

SC 147 Watertight door closure May 1999

SC 148 Ventilation by fan coil units May 1999

SC 149 Portable instruments for measuring flammablevapours May 1999

SC 150 Location of the foam system equipment May 1999

SC 151 Location of the main generating station withrespect to the main switchboard and associatedsection boards May 1999

SC 152 Use of Emergency Generator in Port May 1999

SC 153 Rudder Stock Diameter Ch.II-1,Reg.29.3.3 & 19.14 Feb 2000 2000 DE 43

SC 154 Provision of Detailed Information on SpecificCargo Hold Flooding Scenarios (SOLAS XII/9.3) Mar 2000

SC 155 Lightweight check in lieu of inclining test June 2000


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Interpretation Reference* Adopted Submitted toIMO Remarks

by IACS IMO App

SC 156 Doors in Watertight bulkheads of cargo ships June 2002and Passenger Ships

SC 157 Main Source of Electrical Power June 2000

SC 158 Horizontal Fire Zone Concept June 2000

SC 159 Equivalent Protection /Corr. 1 May 2001

SC 160 Method IIIC Construction June 2000

SC 161 Timber deck cargo in the context of damage stability requirements May 2000

SC 162 Emergency fire pumps for cargo ships - General Feb. 2002

SC 163 Emergency fire pump in cargo ships - sea suctionand sea valve Feb. 2002

SC 164 Emergency fire pumps in cargo ships - priming Feb. 2002

SC 165 Electrical cables for the emergency fire pump June 2002

SC 166 Waste Receptacles June 2002

SC 167 Electrical distribution boards June 2002

SC 168 Hydrants for dangerous goods June 2002

SC 169 Foam systems positions of aft monitors June 2002/Corr.Feb 2003

SC 170 Low pressure CO2 systems June 2002

SC 171 Interpretation of the term First Survey Jul. 2002

SC 172 Monitoring the concentration of hydrocarbon gases in cargo pump Aug 2002rooms on oil tankers

SC 173 Safety Devices in Venting Systems (Reg.II-2/4.5.3.3) July 2003

SC 174 A 60 Front Insulation of Tankers(Reg.II-2/9.2.4.2.5) July 2003

SC175 Combustible Gaskets in Ventilation Duct Connections (Reg.II-2/9.7.1.1 ) July 2003

SC 176 Fixed Local Application Fire Extinguishing System July 2003(Reg.II-2/10.5.6)

SC177 Lubricating Oil and other Flammable Oil System Arrangements — Retroactive July 2003 Application of Regulations II-2/15.3 and 15.4 of SOLAS (2001 Edition)

SC178 Emergency Fire Pumps in Cargo Ships (FSS Code, Ch. 12, 2.2.1.3) July 2003

I A C S

I nt .2 0 0 3


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Interpretation Reference* Adopted Submitted toIMO Remarks

by IACS IMO

SC 179 Dewatering of forward spaces of bulk carriers Sept 2003

SC180 Hold ballast and dry space water level detectors (Chapter XII, Rev.1 May 2004Regulation 12 (Resolution MSC.134(76)) and performancestandards for water level detectors on bulk carriers(Resolution MSC.145(77))

SC181 Bridge Design, Equipment Arrangement and ProceduresSOLAS Chapter V, Regulation 15Corr.1 Mar 2004

SC182 Bulk carriers not complying with SOLAS XII/9 as of 1 January 2004(Chapter XII, Regulation 9) Nov 2003/Corr 1 Dec 2003

SC183 Endorsement of Certificates with the Date of Completion of the Nov 2003Survey on which they are Based

SC 184 Machinery Installations - Deep Ship Condition Dec 2003

SC185 Starting Arrangements for Emergency Generating Sets Dec 2003

SC186 Acceptable voltage variations in voltage when the emergency (under development)loads are supplied from a battery via an electronicconverter/inverter

SC187 Electric steering gear overload alalrm (under development)

SC188 Segregation of Cargo Oil Tanks (Reg.II-2/4.5.1.1) (under development)

SC189 High pressure oil fuel delivery lines on small engines (under development)

SC190 IACS Unified Interpretations (UI) SC 190 Application of SOLAS Regulation II-1/3-6 (Res MSC.134(76)) April 2004and Techncial Provisions on Permanent Means of Access(Res MSC.133(76))

I A C S

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SC1(1974)(Rev.1June 2002)

IACS Int. 1974/Rev.1 2002

SC1

Main source of electrical powerShaft driven generator systems (Regulation II-1/41.1.3)

Generators and generator systems, having the ship’s main propulsion machinery as their prime mover,may be accepted as part of the ship’s main source of electrical power, provided:

1. They are to be capable of operating under all weather conditions during sailing and duringmanoeuvring, also when the vessel is stopped, within the specified limits for the voltage variationin IEC 60092 - 301 and the frequency variation in UR E5.

2. Their rated capacity is safeguarded during all operations given under 1, and is such that in theevent of any other one of the generators failing, the services given under Regulation II-1/41.1.2can be maintained.

3. The short circuit current of the generator/generator system is sufficient to trip thegenerator/generator system circuit-breaker taking into account the selectivity of the protectivedevices for the distribution system.

Protection is to be arranged in order to safeguard the generator/generator system in case of a shortcircuit in the main bus bar. The generator/generator system is to be suitable for further use afterfault clearance.

4. Standby sets are started in compliance with the paragraph 2.2 of SC 157.

Note: 1.Changes introduced in Rev.1 are to be uniformly implemented by IACS Members andAssociates from 1 January 2003.

SC1-1


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SC2

Main source of electrical power Deleted in 2003

SC2(1974)(Rev.1June 2002)


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SC3


SC3(1985)

(R ev.1M ay 1999)

Emergency source of electrical power

(Chapter II-1, Regulation 42.1.4 & 43.1.4)

SOLAS Regulation II-1/42.1.4 and 43.1.4 read:

Provided that suitable measures are taken for safeguarding independent emergency operation under all circumstances, the emergency generator may be used exceptionally, and for short periods, tosupply non-emergency circuits.

Interpretations

Exceptionally, whilst the vessel is at sea, is understood to mean conditions such as

1. blackout situation2. dead-ship situation3. routine use for testing4. short-term parallel operation with the main source of electrical power for the purpose of load

transfer

Unless instructed otherwise by the Administration, the emergency generator may be used during laytime in port for the supply of the ship mains, provided the requirements of UI SC 152 are compliedwith.

Note: Rev.1 of UI SC 3 is to be uniformly implemented by IACS Members and Associates from 1

January 2000


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Emergency source of electrical power

(Chapter II-1, Regulation 42.2.3.1 & 43.2.4.1)

Internal communication equipment required in an emergency is generally:1. The means of communication which is provided between the navigating bridge and the steering

gear compartment2. The means of communication which is provided between the navigating bridge and the position in

the machinery space or control room from which the engines are normally controlled3. The means of communication which is provided between the bridge and the radio telegraph or

radio telephone stations.

Emergency source of electrical power inpassenger ships

(Chapter II-1, Regulation 42.2.3.1 only)

1. The means of communication which is provided between the officer of the watch and the personresponsible for closing any watertight door which is not capable of being closed from a centralcontrol station

2. The public address system or other effective means of communication which is providedthroughout the accommodation, public and service spaces

3. The means of communication which is provided between the navigating bridge and the main fire

control station.

Emergency source of electrical power incargo ships

(Chapter II-1, Regulation 43.6)

Attention is drawn to the following additional requirements:1. IMO Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk, clause

2.9.2.2.2. IMO Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk,

clause 2.9.3.2.

SC4

IACS Int. 1985

SC4–SC6

SC5

SC6


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SC7

SC7–SC9

Precautions against shock, fire and otherhazards of electrical origin


Text:"Exposed live parts having voltages to earth exceeding a voltage to be specified by the Administration"

Interpretation:Voltage values as stated in Regulation 45.1.1.1.


(Chapter II-1, Regulation 45.3.3)

Text:.

Interpretation:1. All final sub-circuits should consist of two insulated wires, the hull return being achieved by

connecting to the hull one of the busbars of the distribution board from which they originate.2. Earth wires should be in accessible locations to permit their ready examination and to enable their

disconnection for testing of insulation.



Text:.

Interpretation:A device or devices to continuously monitor the values of electrical insulation to earth and to give anaudible or visual indication in case of abnormally low insulation values.

SC8

SC9

IACS Int. 1985


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Precautions against shock, fire and other

hazards of electrical origin


Text:"shall be at least of a flame-retardant type .

Interpretation:This may be achieved by cables which have been tested in accordance with IECPublication 60332-1 or a test procedure equivalent thereto.

Text:

shall be so installed as not to impair their original flame-retarding properties .

Interpretation:

This may be achieved by:

Method 1Cables which have been tested in accordance with IEC Publication 60332-3 Category A/F or a test procedure for cables installed in bunches equivalent thereto.

Method 2 (See Figures 1-4)

2.1 Fire stops having at least B-0 penetrations fitted as follows:1 cable entries at the main and emergency switchboard,2 where cables enter engine control rooms,3 cable entries at centralized control panels for propulsion machinery and essential

auxiliaries,4 at each end of totally enclosed cable trunks; and

2.2 In enclosed and semi-enclosed spaces, cable runs are to comply with thefollowing:

1 to have fire protection coating applied:- to at least 1 metre in every 14 metres- to entire length of vertical runs, or 2 fitted with fire stops having at least B-0 penetrations every second deck or

approximately 6 metres for vertical runs and at every 14 metres for horizontal

runs.

The cable penetrations are to be installed in steel plates of at least 3 mm thicknessextending all around to twice the largest dimension of the cable run for vertical runsand once for horizontal runs, but need not extend through ceilings, decks, bulkheadsor solid sides of trunk. In cargo area, fire stops need only be fitted at the boundaries of the spaces.

SC10(Rev 11997)(Rev.2May2001)

SC10

IACS Int. 1985/Rev 2 2001

Note: Changes introduced in Rev.2 are to be implemented by IACS Members and Associates from 1 July 2001.


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SC10

SC10

FIRE STOPS (STEEL PLATE AT LEAST 3mm

THICKNESS)

NON TOTALLY ENCLOSED

TRUNKS

VERTICAL

6mFIRE STOP WITHSTEEL PLATE ANDB-0 PENETRATION

a A

2a

a B

2 a

2a

Fig. 2

Fig. 1

B-0

PENETRATION

B-0

PENETRATION

FIRE STOPS (STEEL PLATE AT LEAST 3mm

THICKNESS) TOTALLY ENCLOSED TRUNKS

B-0PENETRATION

B-0PENETRATION

STEEL PLATE

FIRE STOPS (STEEL PLATE AT LEAST 3mm THICKNESS)

NON TOTALLY ENCLOSED TRUNKS

HORIZONTAL

14m

;

; ;

a STEELPLATE

a 1a

REMARK: THE LENGTH (a) OF THE FIRE STOPS FOR HORIZONTALCABLE RUNS SHOULD BE AT LEAST ONCE OF THELARGEST D IMENSION OF THE CABLE BUNCH OR UP

TO THE DECK

Fig. 3

FIRE STOPS (STEEL PLATE AT LEAST 3mm THICKNESS)

OPEN CABLE RUNS

VERTICAL

Fig. 4

FIRE STOP

FIRE STOP

6m

2a a 2a2a

B-0

PENETRATION

STEEL

PLATE

OR

C O A T I N G

E N T I R E L E N G T H

FIRE STOP

HORIZONTAL14m

1a

1a

1a a

14m

1m

COATING COATING

1m

1a

B-0

PENETRATION

STEEL PLATE

OR


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Precautions against shock, fire and otherhazards of electrical origin(Chapter II-1, Regulation 45.5.3)

High fire risk areas are those considered as such in Chapter II-2 Regulations 26, 27, 44 and 58.



Special precautions should be as follows:1. Cables to be appropriately sheathed according to intended environment.2. Cables to be suitably protected against mechanical damage.3. Electrical and mechanical segregation of intrinsically safe circuits from other circuits.4. Effective earthing of metal coverings of cables.



Text:"overload......or where the Administration may exceptionally otherwise permit".

Interpretation:1. When it is impracticable, for example engine starting battery circuit.2. When by design the circuit is incapable of developing overload, for example control transformers.3. For essential motors which are duplicated and thruster motors, the overload protection may be

replaced by an overload alarm.

Special requirements for machinery, boilersand electrical installations


This regulation is applicable to stand-by machines required by the Rules of the individual Societies for:1. oil engines for propulsion purposes,2. steam turbines for propulsion purposes,3. gas turbines for propulsion purposes,4. controllable pitch propellers.

SC12

IACS Int. 1985

SC11-SC14

SC13

SC14

SC11


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SC15

SC15–SC18

Definitions


Spaces which contain oil fired equipment other than boilers, such as inert gas generators, incinerators,waste disposal units etc. are to be considered as machinery spaces of category in accordance withthis regulation.

Definitions


"Oil fuel unit" includes any equipment used for the preparation and delivery of oil fuel, heated or not, toboilers (including inert gas generators) and engines (including gas turbines) at a pressure of more than0.18 N/mm2.

Definitions


Spaces containing, for instance, the following battery sources should be regarded as control stationsregardless of battery capacity:1. emergency batteries in separate battery room for power supply from black-out till start of

emergency generator,2. emergency batteries in separate battery room as reserve source of energy to radiotelegraph

installation,3. batteries for start of emergency generator,4. and, in general, all emergency batteries required in pursuance of Reg. II-1/42 or Reg. II-1/43..

Fire pumps, fire mains, hydrants and hoses

(Chapter II-2, Regulation 4.3.1.3)

Cargo ships of less than 1,000 tons gross tonnage shall be provided with not less than two power firepumps, one of which is to be an independently driven pump.

SC16

SC17

SC18

IACS Int. 1985


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Fire pumps, fire mains, hydrants and hoses(Chapter II-1, Regulation 4.3.3.2)

Not only emergency pumps, but also sea water inlet, suction and delivery pipes with valves etc. shall beoutside the compartment containing the other fire pumps. Only short lengths of suction and dischargepiping may, however, under certain circumstances penetrate the machinery spaces if enclosed insubstantial steel casing (Reg. II-2/4.6.3).

The sea-chest with valve and the main part of the suction piping should be, in general, outside themachinery spaces. If this arrangement cannot be made, the sea chest may be fitted in the machineryspaces on the condition that the valve is remotely controlled from a position near the pump, in the samecompartment, and the suction pipe is as short as practicable.

In lieu of the steel casing the pipe may be insulated equivalent to class A-60 standard. The pipe shouldhave substantial wall thickness and in no case less than 11 mm and should be all welded except forflanged connection to the sea inlet valve.


(Chapter II-2, Regulation 4.3.3.2.1)

The capacity of the emergency fire pump shall be not less than 40 per cent of the required total capacityof the fire pumps as per Reg. II-2/4.2.1.

Fire pumps, fire mains, hydrants and hoses(Chapter II-2, Regulation 4.3.3.2.5)

The ballast condition of a vessel on entering or leaving a dry dock need not be considered a servicecondition.



In case of an air-lock the two doors are to be of steel, reasonably gas tight, self closing and without anyhold back arrangement.

SC19(Rev 11996)


SC19–SC22

SC20

SC21(Rev 11996)

SC22

SC19-1


25/280



Only one of the required fire pumps needs to be provided with automatic starting.



Text:"..... the following minimum pressure shall be maintained at all hydrants:

Passenger ships:Under 1.000 tons gross tonnage, to the satisfaction of the Administration.

Cargo ships:Under 1.000 tons gross tonnage, to the satisfaction of the Administration.

Interpretation:The minimum pressure is to be sufficient to produce a 12 m jet throw, through any adjacent hydrants, toany part of the ships referred to in Reg. II-2/4.5.1, on passenger and cargo ships under 1.000 tons grosstonnage.

Fixed gas fire-extinguishing systems


Text:"The alarm shall operate for a suitable period before the medium is released".

Interpretation:

1) Certain spaces for which the automatic warning of release of the extinguishing medium isrequired:Ordinary cargo holds need not comply with Reg. II-2/5.1.6. However, ro/ro cargo spaces, holds incontainer ships equipped for integrated reefer containers and other spaces where personnel can beexpected to enter and where the access is therefore facilitated by doors or manway hatches shallcomply with the above regulation.Small spaces, such as small compressor rooms, paint lockers, lamp stores etc. need not complywith Reg. II-2/5.1.6.

2) Advance period of time of alarm sounding:The alarm shall sound for the period of time necessary to evacuate the space but not less than 20 s.

Note: Changes introduced in Rev.1 are to be uniformly implemented by IACS Members and Associates

from 1 January 2001.

SC23(1985)


SC23–SC25

SC24(1985)

SC25(1985)(Rev.1June 2000)


26/280


27/280

IACS Int. 1998/Rev. 1 2000

SC30

Fire-extinguishing arrangements in machinery

spaces(Interpretation of Chapter II-2, Regulation 7.1 and 7.2)

Number of systems, appliances and extinguishersrequired by Reg. II-2/7.1 & 7.2

Notes:

*1. May be located at outside of the entrance to the room.*2. May be arranged outside of the space concerned for smaller spaces of cargo ships.*3. The amount of sand is to be at least 0.1 m3. A shovel is to be provided. Sand boxes may

be substituted by approved portable fire extinguishers.*4. Not required for such spaces in cargo ships wherein all boilers contained therein are for

domestic services and are less than 175 kW.*5. In case of machinery spaces containing both boilers and internal combustion engines

(case not explicitly considered in Reg. 7) reg. 7.1 and 7.2 apply, with the exception thatone of the foam fire-extinguishers of at least 45 l capacity or equivalent (required by Reg.7.2.3) may be omitted on the condition that the 135 l extinguisher (required by Reg. 7.1.3)can protect efficiently and readily the area covered by the 45 l extinguisher.

*6. Oil fired machinery other than boilers such as fired inert gas generators, incinerators andwaste disposal units are to be considered the same as boilers insofar as the requirednumber and type of fire fighting appliances are concerned

SC30(May 1998)(Rev. 1June 2000)

Systems,

appliances &

extinguishers

Category A

machinery

spaces

Fixed

fire-

extin-

guish-

ing

system

Portable

foam

applica

-tor*1

Portable

foam

extin-

guish-

ers

Add’l

portable

foam

extin-

guish-

ers

135 l

foam

extin-

guisher

5 l foam

extin-

guis-

hers*2

Sand

boxes*3

SOLAS

paragraph

7.1.1,

7.2.1

7.1.2,

7.2.27.1.3 7.2.3 7.1.3 7.2.3 7.1.4

Boiler room containing:

Oil-fired boilers 1 1 2N NA 1*4 - NOil-fired boilers

and oil fuel units1 1 2N + 2 NA 1

*4- N

Engine room containing:

Oil fuel units only 1 - 2 NA - - -

Internal

combustion

machinery

1 1 x - y -

Internal

combustion

machinery and oil

fuel units

1 1 x - y -

Combined engine/boiler room containing:

Internal

combustion

machinery, oil

fired boilers and

oil fuel units

1 1

(2N + 2) or x

whichever is

greater

1*4

y*5

N

N = number of firing spaces.

“2N” means that two extinguishers are to be located in each firing space.

x = sufficient number, minimum two in each space, so located that there are at least one

portable fire extinguisher within 10 m walking distance from any point.

y = sufficient number to enable foam to be directed onto any part of the fuel and lubricating oil

pressure systems, gearing and other fire hazards.

Note: Changes introduced in Rev.1 are to be implemented by IACS Members and Associates

from 1 January 2001.


28/280

Fire-extinguishing arrangements in

machinery spaces


Where a fixed fire-extinguishing system not required by this chapter is installed, it shall meet therequirements of the relevant regulations of this chapter.

Fixed high expansion foam fire-extinguishing

system

(Chapter II-2, Regulation 9)

When such a system is to be fitted in any other space than a machinery space, this regulation applies.

Special arrangements in machinery spaces


Usual ventilation systems may be acceptable as arrangements for permitting the release of smokerequired by Regs. II-2/11.2.2 and II-2/11.4.2.

SC31—SC33

IACS Int. 1985

SC31

SC32

SC33


29/280

Automatic sprinkler, fire detection and firealarm system


By nominal area is meant the gross, horizontal projection of the area to be covered.

Fixed fire detection and fire alarm system


The main (respective emergency) feeder shall run from the main (respective emergency) switchboard tothe change-over switch without passing through any other distributing switchboard.

Arrangements for oil fuel, lubricating oil and

other flammable oils(Chapter II-2, Regulation 15.2.5)

The provision of this paragraph applies to fuel oil tanks having capacity of 500 litres and above.

Arrangements for oil fuel, lubricating oil andother flammable oils


Text:"Oil fuel pipes and their valves and fittings shall be of steel or other approved material,.......".

Interpretation:For valves, fitted to oil fuel tanks and which are under static pressure-head, steel or nodular cast iron maybe accepted. However, ordinary cast iron valves may be used in fuel piping systems where the designpressure is lower than 7 bar and the design temperature is below 6°C (i.e. in Class III piping).

SC34

IACS Int. 1985

SC34–SC37

SC35

SC36

SC37


30/280

Arrangements for oil fuel, lubricating oil andother flammable oils


The provision of Reg. II-2/15.2.5 applies to lubricating oil tanks except those having capacity less than500 litres.

Relaxation from this provision may be given, on a case by case basis, where it is determined that anunintended operation of the quick closing valve, on the oil lubricating tank, would endanger the safeoperation of the main propulsion and essential auxiliary machinery.

Ventilation systems in ships other than passengerships carrying more than 36 passengers


Equally effective local closing arrangements means that in case of ventilators these are to be fitted withfire dampers which shall be easily closed within the control station in order to maintain the absence of smoke in the event of fire.

Means of escape


Text:"One of these ladders shall provide continuous fire shelter from the lower part of the space to a safeposition outside the space;"

Interpretation:This shelter is to be of steel, insulated where necessary, and provided with a steel self-closing door at thelower end. If access is provided at other levels within the machinery space each level is to be providedwith a steel self-closing door.

SC38

SC38–SC40

IACS Int. 1985

SC39

SC40


31/280

Means of escape


Text:Reg. 28.3.2: " ... and in a ship of 1.000 tons gross tonnage and above, the Administration may dispensewith one means of escape from any such space if either a door or a steel ladder provides a safe escaperoute to the embarkation deck, due regard being paid to the nature and location of the space and whetherpersons are normally employed in that space."

Interpretation:The above requirement applies only to certain auxiliary machinery spaces.

Fire protection arrangements in cargo spacesincl. special category spaces

(Chapter II-2, Regulation 37.2.2.1 and 53.2.4.2)

Text:" ....shall be of a type so enclosed and protected as to prevent the escape of sparks ..."

Interpretation:

This is realised by an enclosure of at least IP55 or by apparatus suitable for use in Zone 2 areas asdefined in I.E.C. Publication 79.

Fire protection arrangements in cargo spacesincl. special category spaces

(Chapter II-2, Regulation 37.2.2.1, 2.2.2, (3.2.1), 3.2.2, 38.(4.1), 4.2, 53.(2.4.1), 2.4.4)

Text:>

Interpretation:In both cased (i.e. "approved" and "suitable") this is interpreted as requiring certified safe equipmentsuitable for use in Zone 1 as defined in I.E.C. 79. (Gas Group IIA, and Temperature Class T3).

SC41

IACS Int. 1985

SC41–SC43

SC42

SC43


32/280

Bulkheads within accommodation andservice spaces


Crowns and casings of machinery spaces of category A shall be insulated in compliance with the TablesII-2/44.1 and 44.2 in Reg. II-2/44. Accordingly crowns and casings exposed to the open air need not beinsulated.

Fire integrity of bulkheads and decks


The following spaces are considered to belong to the categories of spaces dealt with by Reg, II-2/44, forthe purpose of this regulation, as follows:– Navigation equipment room (radar transmitter) and battery rooms (1) Control stations– Electrical equipment rooms (Auto-teleph. exchange, air conditioning (7) Other machinery

duct spaces) spaces.

Note 1: Provision chambers are to be treated as store rooms.Note 2: Refrigerated provision chambers are to be Category 9 service spaces if thermally insulated with

combustible materials, or Category 5 service spaces if thermally insulated with non-combustible

materials.

Protection of stairways and lift trunks inaccommodation spaces, service spacesand control stations


Dumb-waiters are to be regarded as lifts.

SC44(19 74 )

SC44–SC46

IACS Int. 1985

SC45

SC46


33/280


34/280

Special requirements for ships carryingdangerous goods


A high expansion foam system complying with Reg. II-2/9 is acceptable except if cargoes dangerouslyreact with water (see the IMDG Code, paragraph 16.2.2 of Section 16, page 0113).



The fans are to be of non-sparking type, as per the UR F29.The purpose of "suitable wire mesh guards" is to prevent foreign objects from entering into the fan casing.



(Cancelled at C27, 1993)

Location and separation of spaces


By the expression “cofferdam” is meant, for the purpose of this regulation, an isolating space betweentwo adjacent steel bulkheads or decks.

The minimum distance between the two bulkheads or decks should be sufficient for safe access andinspection. In order to meet the single failure principle, in the particular case when a corner-to-cornersituation occurs, this principle may be met by welding a diagonal plate across the corner.

SC51

SC51–SC54

IACS Int. 1993/Rev 1997

SC52

SC53

SC54(Rev 11997)


35/280

Location and separation of spaces(Chapter II-2, Regulation 56.6.2)

1. An access to a deck foam system room (including the foam tank and the control station) can bepermitted within the limits mentioned in Reg. II-2/56.6.1, provided that the conditions listed inReg. II-2/56.6.2 are satisfied and that the door is located flush with the bulkhead.

2. The navigating bridge doors and windows are to be tested for gas tightness.If a water hose test is applied the following may be taken as a guide:1.nozzle diameter: minimum 12mm2.water pressure just before the nozzle: not less than 2 bar3.distance between the nozzle and the doors or windows: maximum 1,5 m.

Venting, purging, gas freeing and ventilation


Anchor windlass and chain locker openings constitute ignition hazard.They are to be located at the distances required by Reg. II-2/59.1.7.2, 59.1.9.3 and 59.1.9.4.



Text:>.

Interpretation:Electrical equipment fitted in compliance with IEC 92-502 is not considered to be a source of ignition orignition hazard.



The outlets mentioned in Reg. II-2/59.2 are to be located in compliance with Reg. II-2/59.1.9.3 as far asthe horizontal distance is concerned.

SC55

IACS Int. 1985

SC55–SC58

SC56

SC57

SC58


36/280

Cargo tank protection(Chapter II-2, Regulation 60.6)

All tankers means any tanker, of any deadweight, fitted with crude oil washing system, irrespective of itsage.

Fixed deck foam systems


Reg. II-2/61.8 applies to all tankers regardless of size.

Fixed deck foam systems(Chapter II-2, Regulation 61.10)

A common line for fire main and deck foam line can only be accepted provided it can be demonstrated

that the hose nozzles can be effectively controlled by one person when supplied from the common line ata pressure needed for operation of the monitors. Additional foam concentrate is to be provided foroperation of 2 hose nozzles for the same period of time required for the foam system.

The simultaneous use of the minimum required jets of water should be possible on deck over the fulllength of the ship, in the accommodation, service spaces, control stations and machinery spaces.

Inert gas systems(Chapter II-2, Regulation 63.13.4, 18.2)

As a guide, the effective isolation required by this regulation may be achieved by the two arrangements

shown in the following sketches.

SC59

SC59–SC62

IACS Int. 1985/Rev. 1 1994

SC60

SC61(Rev.1 1994)

SC62

C AR G O PIPIN G

N O N R E TU R N

VALVE

VEN TIN G

SPO O L PIEC E

IN ERT G AS M AIN


37/280

Pre-discharge alarm of fixed gas fireextinguishing systems

(Chapter II-2, Regulation 5.1.6 [1981])

The pre-discharge alarm shall be automatically activated, e.g. by opening of release cabinet door. Anautomatic time-delay device shall ensure that the alarm operates for at least 20sec. before the medium isreleased.

Fire dampers in ventilation ducts

(Chapter II-2, Regulation 16.2 [1981])

Ducts or pipes with free sectional area of 0,075m2 or less need not be fitted with fire damper at theirpassage through Class "A" divisions provided that the requirements of Reg. 16.2.2, 16.3, 16.4, 16.8,18.11 and 32.1.3 are complied with.

Ventilation ducts for galley(Chapter II-2, Regulation 16.3 [1981])

Galley ventilation systems are to be separate from the ventilation systems serving other spaces. Whenpassing through accommodation spaces, service spaces and control stations, galley ventilation ducts areto be constructed of steel having a thickness as per Reg. 16.3.1.1 for the entire length passing throughsuch spaces.

Integrity of emergency generator space(Chapter II-2, Regulation 44, Table 44.1 [1981])

The required division of steel between control stations and open decks may in the case of an emergencygenerator be provided with openings for intake of combustion air to the diesel engine and for intake of cooling air in the case of an air cooled diesel engine. These openings need not be fitted with means forclosure for fire integrity purposes, unless a fixed gas fire fighting system for the emergency generatorspace is fitted.

SC63

IACS Int. 1985

SC63–SC66

SC64

SC65

SC66


38/280

Doors in fire-resisting corridor bulkheadsof cargo ships


Ventilation openings may also be permitted in "B" class doors leading to lavatories, offices, smallpantries, lockers, store rooms, etc.

Cofferdams adjacent to slop tanks of combination carriers


The cofferdams required adjacent to slop tanks are to be spaces not used for cargo or ballast and shall notbe connected to piping systems serving oil cargo or ballast.

Arrangement for pumping of slops incombination carriers in dry cargo mode


The system for transfer of slops to the open deck shall be a permanent installation. When the transfersystem is used for slop transfer in the dry cargo mode, the system shall have no connection to othersystems. Separation from other systems by means of removal of spool pieces may be accepted. The sloptransfer manifold on decks shall be provided with a shut-off valve and a blank flange.

SC67

SC67–SC69

IACS Int. 1985

SC68

SC69


39/280

Area Classification and selection of electricalequipment


Text:

Be arranged at the furthest distance practicable but not less than 5m from the nearestair intakes and openings to enclosed spaces containing a source of ignition and fromdeck machinery and equipment which may constitute an ignition hazard.

Interpretation:

1. Areas on open deck, or semi-enclosed spaces on open deck, within 3m of cargotank ventilation outlets which permit the flow of small volumes of vapour, air orinert gas mixtures caused by thermal variation are defined as Zone 1.

Permitted electrical equipment:- Certified safe type equipment for Zone 1.

2. Areas within 2m beyond the zone specified in 1 above are defined as Zone 2.

Permitted electrical equipment:- Certified safe type equipment for Zone 1,- Equipment of a type, which ensures the absence of sparks, arcs and of “hot

spots” during its normal operation,

- Equipment having an enclosure filled with a liquid dielectric, when required bythe application, or encapsulated,

- Pressurised equipment,- Equipment specifically designed for Zone 2 (for example type “n” protection in

accordance with IEC 60079-15).


Text:Not less than 10m measured horizontally from the nearest air intakes and openings toenclosed spaces containing a source of ignition and from deck machinery andequipment which may constitute an ignition hazard.

SC70(1985)(Rev.1May2001)

IACS Int. 1985/Rev. 1 2001

SC70

Note: Changes introduced in Rev.1 are to be implemented by IACS Members and

Associates from 1 July 2001.


40/280

SC 70

SC 70(Cont d)


(IBC Code, Para. 8.3.3.2)

Text:

The position of vent outlets of a controlled tank venting system should be arranged ata distance of at least 10m measured horizontally from the nearest air intake or openings to accommodation, service and machinery spaces and ignition sources.

(IGC Code, Para 8.2.10)

Text:

All other vent exits connected to the cargo containment system should be arranged ata distance of at least 10m from the nearest air intake or opening to accommodationspaces, service spaces and control stations, or other gas-safe spaces.

Interpretation:

1. Areas on open deck, or semi-enclosed spaces on open deck, within a verticalcylinder of unlimited height and 6m radius centred upon the center of the outlet,and within a hemisphere of 6m radius below the outlet which permit the flow oflarge volumes of vapour, air or inert gas mixtures during loading/discharging/ballasting are defined as Zone 1.

Permitted electrical equipment:Certified safe type equipment for Zone 1.

2. Areas within 4m beyond the zone specified in 1 above are defined as Zone 2.

Permitted electrical equipment:- Certified safe type equipment for Zone 1,

- Equipment of a type, which ensures the absence of sparks, arcs and of “hotspots” during its normal operation,

- Equipment having an enclosure filled with a liquid dielectric, when required bythe application, or encapsulated,

- Pressurised equipment,- Equipment specifically designed for Zone 2 (for example type “n” protection in

accordance with IEC 60079-15).


41/280

Tank level gauging systems


Text:Provision shall be made to guard against liquid rising in the venting system to a height which wouldexceed the design head of cargo tanks. This shall be accomplished by high level alarms or overflowcontrol systems or other equivalent means, together with gauging devices and cargo tank fillingprocedures.

(BCH Code, Para 59.1.6)(IBC Code, Para 8.1.2)

Text:Provision should be made to ensure that the liquid head in any tank does not exceed the test head of thattank; suitable high level alarms, overflow control systems or spill valves, together with gauging devicesand tank filling procedures may be accepted for this purpose.

Interpretation:The system for guarding against liquid rising to a height which would exceed the design head of cargotanks is to be independent of the gauging devices.

In a ship engaged regularly in voyages of

short duration(Chapter II-2, Regulation 42.2.7, 43.2.6.2 [1981])

Dispensation to the reduced period of availability of the emergency source of power can be given to:1 Vessels with a class notation "Coastal Service"2 Vessels engaged in voyages where the route is no greater than 20 nautical miles offshore.

Fire protection arrangements in cargo spaces

including special category spaces(Chapter II-2, Regulation 37.1.5.3, 53.2.2.3 [1981])

Portable extinguishers suitable for fighting oil fires shall be provided at each car decklevel in each hold of compartment where vehicles are carried, spaced not more than20m apart, on both sides of the ship. One of these extinguishers shall be positioned ateach entrance to the car spaces.

Notes: 1. This need not apply to weather decks used as ro-ro cargo spaces.

2. Changes introduced in Rev.1 are to be implemented by IACS Members and Associates from 1 July 2001.

SC71–SC73

IACS Int. 1985/Rev. 1 2001

SC71(1985)

SC72(1985)

SC73(Rev.1May, 2001)


42/280

Fire protection arrangements in cargo spacesincluding special category spaces

(Chapter II-2, Regulation 37.2.2, 37.3.2, 38.4.1, 53.2.4.3 [1981])

Exhaust fans shall be of non-sparking type in accordance with UR F29.

Fire protection arrangements in cargo spaces

(Chapter II-2, Regulation 53.2.3.3 [1981])

The requirements to indicate any loss of ventilation capacity is considered complied with by an alarm onthe bridge, initiated by fall-out of starter relay of fan motor.

Engine bearing temperature monitors


The wording "or engine bearing temperature monitors" is understood to include all bearings i.e. journaland connecting rod bearings.

Cargo tanks overflow control system use of spill valves


Spill valves will normally not be considered equivalent to overflow system.

IACS Int. 1985

SC74–SC77

SC74

SC75

SC76

SC77


43/280

SC78

SC78–SC79

Fire safety measures for tankers

(Chapter II-2, Regulation 55 [1981])

Vegetable oil, latex and molasses are coming under the type of cargo specified in Reg. II2/53.1.2 ascargo which constitute a low fire risk.

Certified Safe Type Electrical Equipment for

Ships Carrying Dangerous Goods(Chapter II-2, Regulation 54.2.2)

1. General

This interpretation is based on the following:– SOLAS Chapt. II-2, Reg. 54 "Special requirements for ships carrying dangerous goods"– SOLAS, Chapt. VII "Carriage of dangerous goods",– "Code of safe practice for solid bulk cargoes" (IMO, BC-Code),– "International Maritime Dangerous Goods Code" (IMDG) Code.

2. Scope

2.1 This interpretation is applicable to the electrical installation on the following types of ships andcargo spaces:

a) Ships and cargo spaces not specifically designed for the carriage of freight containers but intendedfor the carriage of dangerous goods in packaged form, including goods in freight containers andportable tanks.

b) Purpose built container ships and cargo spaces intended for the carriage of dangerous goods infreight containers and portable tanks.

c) Ro-ro ships and ro-ro cargo spaces intended for the carriage of dangerous goods.d) Ships and cargo spaces intended for the carriage of solid dangerous goods in bulk.e) Ships and cargo spaces intended for carriage of dangerous goods other than liquids and gases in

bulk in shipborne barges.

2.2 Dangerous goods, for which safety measures may be required with respect to the electricalequipment, are based on SOLAS, Chapt. II-2 and VII, IMDG-Code and IMO-BC-Code and are grouped

into the following classes:

a) Dangerous goods in packaged form.

Class 1 Explosives, except goods of division 1.4, compatibility group S.Class 2.1 All flammable gases, compressed, liquified or dissolved under pressure.Class 3.1 All flammable liquids having a flashpoint below 23°C (closed cup test).

3.2Class 6.1 All poisonous (toxic) substances having a flashpoint below 23°C (closed cup test).Class 8 All corrosive liquids having a flashpoint below 23°C (closed cup test)

IACS Int. 1992/Corr.

SC79


44/280

b) Solid dangerous goods in bulk.

Class 4.1 Flammable solidsClass 4.2 Substances liable to spontaneous combustionClass 4.3 Substances, which in contact with water, emit flammable gases.Class 5.1 Oxidizing substancesClass 9 Miscellaneous dangerous substances, that is any other substance in respect of which

experience has shown, or may show, to be of such a dangerous character that theprovisions of this part shall apply to it.

MHB The materials, when carried in bulk, present sufficient hazards to require specificprecautions.

3. Hazardous areas and electrical equipment in these areas

For the purpose of this interpretation, hazardous areas are those in which an explosive atmosphere mayexist due to the carriage of the cargoes identified in 2.2.

These areas require special precautions for the construction, installation and use of electrical apparatus.

Reference is made to IACS Recommendation No. 22 (1988) "Recommendations for the classification of areas where flammable gas or vapour risks may arise to permit the proper selection of electricalequipment".

3.1 Areas in which flammable gas/air mixture or dangerous quantity and concentration of dust islikely to occur in normal operation are identified as Zone 1-B.

3.2* Areas in which flammable gas/air mixture is not likely to occur in normal operation are identifiedas zone 2.

3.3 Electrical equipment and wiring shall not be fitted in hazardous areas unless it is essential foroperational purposes. The electrical equipment installed and employed must be suitable for the dangerousgoods to be carried and must be selected with due consideration to the following criteria:

- degree of protection IPXX for explosive dust concentration- surface temperature- temperature class for explosive gas atmosphere- explosion group (certifiedsafe type equipment)

3.4 Hazardous areas intended for carrying dangerous goods and electrical equipment for use in theseareas specified in Tables 1, 2 and 3.

*) – In this moment it is above SOLAS Chapter II-2 Reg. 54.2.2

– IMO decision is expected

Reference is made to:1) IEC Publication 529, Classification of degree of protection provided by enclosures.2) IEC Publication 79, Electrical apparatus for explosive gas atmospheres.

SC79

SC79cont'd



45/280


46/280

Table 2Solid dangerous goods in bulk as defined under 2.2b

which may develop dust only

IACS Int. 1986

SC79

SC79cont'd

Zone Description of Typical Permitted

location Example equipment/cable

1–B i) Enclosed and semi- Minimum requirements:

enclosed cargo spaces; – degree of protection IP55

– surface temp. max. 200°C

or

certified safe type equipment:ii) Inlet and exhaust – degree of protection IP55;

ventilation ducts – temperature class T3.

iii) Enclosed or semi- Note: If cargoes are to be

enclosed spaces having a transported which require a

direct opening (without lower surface temperature,

closeable openings, such as this should be taken into

doors) into any of the areas consideration

as specified under i) and ii)

– cables as specified in

clause 4.


47/280

Table 3Carriage in a packed form of flammable liquids with a flash point below 23°C, flammable gases (as

defined under 2.2a) and carriage in bulk of solid dangerous goods which under certain conditions maydevelop an explosive gas atmosphere (as defined under 2.2b)

SC79

SC79cont'd

IACS Int. 1993

Zone Description of Typical Permitted

location Example equipment/cable

1–B i) Enclosed and semi- – Certified safe type

enclosed cargo spaces and equipment:

closed or open ro-ro spaces; a) intrinsically safe Exi;

b) flame proof enclosure

ii) Inlet and exhaust Exd;

ventilation ducts serving c) pressurized type Exp;

hazardous areas; d) increased safety type

Exe;

e) special protection Exs.

iii) Enclosed and semi- Note: Unless otherwise

enclosed spaces having a specified, the minium

direct opening (without requirements are:

closeable openings, such as – temperature class T4;

doors) into any of the areas – explosion group II B.

as specified under i) and ii);

If cargoes are to be

transported which require ahigher grading, this should be

taken into consideration.

– cables as defined in

clause 4.


48/280

Table 3 (cont.)


1 2 3 4

2* i) Areas on open deck or a) Electrical equipment as

areas in semi-enclosed permitted in Zone 1–B;

space onopen deck with b) Equipment of protection

opening within 3m. class Exn

of anymechanical c) Appliances which do not

exhaust ventilation generate arcs in service

outlet of hazardous and whose surface does

areas; not reach unacceptably

high temperatures;

ii) Areas having a gastight d) Appliances with simplified

closure or a gastight door presurized enclosures or

with selfclosing devices vapour proof enclosures

leading to Zone 1–B area and (minimum class of

not being ventilated by over protection IP55) whose

pressure. Watertight doors surface does not reach

may be considered as being unacceptably high

gastight temperatures;

e) cables as specified in

iii) Spaces under ii) may be Clause 4.

considered as not hazardous,

provided that they are

ventilated by overpressure

with an air change rate not

less than 6 times per hour. Note:

In case of failure of the 1. For spaces under iii) and

ventilation system a visual v), equipment essential either

and audible alarm is to be for the safety of the vessel or

given and the equipment crew must be approved for

which is not suitable for the hazardous areas without

Zone 2 must be ventilation and is not to be

automatically switched off; switched off automatically

iv) Spaces under ii) may be 2. For spaces under v) an

considered as not hazardous, air change rate not less than

provided that they are 6 times per hour is to be

protected by airlock leading provided. In case of failureto Zone 1–B. The doors must of the ventilation system a

be gastight with self- visual and audible alarm is

closing devices to be given and the equipment,

which is not of certified safe

v) Bilge pump rooms and pipe type, must be automatically

tunnels with equipment, such switched off.

as flanges, valves, pumps, etc.

serving Zone 1–B areas.

SC79

SC79cont'd

3 m


49/280


50/280

Fire-Extinguishing Arrangement for PaintLockers


1. Paint lockers and flammable liquid lockers of deck area 4 m2 and more shall be provided with afire-extinguishing system enabling the crew to extinguish a fire without entering the space. Fixedarrangements as specified below may be provided.

– CO2 – System, designed for 40% of the gross volume of the space.– Dry-Powder-System, designed for at least 0.5 kg powder/m3

– Water spraying system designed for 5 1/2 , min.

2. Water spraying systems may be connected to the ship's main system.

3. Other systems than those mentioned above may be accepted.

4. For lockers of deck area less than 4 m2 CO2, or dry-powder fire extinguisher(s) may be accepted.

SC80

SC80

IACS Int. 1992


51/280

Drainage of enclosed spaces situated onthe bulkhead deck (Chapter II-1, Regulation 21.1.6.1)

The text of this paragraph precludes drainage of such enclosed spaces to suitable spaces below deck if the edge of the bulkhead deck or freeboard deck, as applicable, is immersed when the ship heels morethan 5 degrees.Based on the derivation, this is not considered to have been the intent.

Accordingly, when applying this paragraph, the wording of the revised Regulation 22, ICLL 1966,contained in Annex 2 to MSC 53/12, further revised below for clarity, should be followed, i.e.:

"Scuppers led through the shell from enclosed superstructures used for the carriage of cargo shall bepermitted, providing the spaces drained are located above the waterline resulting from a 5 degree heel toport or starboard at a draught corresponding to the assigned summer freeboard. In other cases, thedrainage shall be led inboard".

Protection against noise(Chapter II-1, Regulation 36)

The Regulation deals with noise levels in machinery spaces and makes reference to the Code on NoiseLevels on Board Ships, adopted by IMO with Res. A.468 (XII), which applies to new ships of 1600 tonsgross tonnage and over and that it is not limited to machinery spaces.

The Regulation can be interpreted as follows:

1. It applies to machinery spaces only;

2. IMO Res. A.468 (XII) is to be taken as a basis for its implementation;

3. with regard to para. 4.1.6 of IMO Resolution, if a sound level of 105 dB (A) is exceeded, also theISO noise rating (NR) is not be exceed the value of NR 105;

4. with regard to para 2.2.2 of IMO Resolution, "Operating condition at sea", the propulsion

machinery shall be run at normal service speed and at not less than 80% of the maximumcontinuous rating MCR;

5. for existing ships, only the actual noise limits are to be measured and, on the basis of them, thelimits of exposure of the seafarers are to be determined according to Chapter 5 of IMO Resolutionand the measures as per Chapter 7 of the Resolution itself are to be implemented;

6. for new ships of less than 1600 tons gross tonnage, the same procedure specified for existing shipsapplies.

SC81-SC82

IACS Int. 1993

SC82

SC81


52/280

Continuity of the Supply when TransformersConstitutes an Essential Part of theElectrical Supply System(Chapter II-1, Regulation 41.1.5)

The number, capacity and arrangement of power transformers supplying auxiliary electrical systems areto be such that with any one transformer not in operation, the remaining transformer(s) is (are) sufficientto ensure the safe operation of those services necessary to provide normal operational conditions of propulsion, safety and minimum comfortable conditions of habitability are also to be ensured, whichinclude at least adequate services for cooking, heating domestic refrigeration, mechanical ventilation,sanitary and fresh water.

Each transformer required is to be located as a separate unit with separate enclosure of equivalent, and isto be served by separate circuits on the primary and secondary sides. Each primary circuit is to be beprovided with switch-gear and protection devices in each phase.

Each of the secondary circuits is to be provided with a multipole isolating switch.

Transformers supplying bow thruster are excluded.

IACS Int. 1993

SC83

SC83

(a) (a) (a) (a) (a)

(b) (b) (b) (b) (b)

"P" "P"

R

S

T

R

S

T

R

S

T

R

S

T

( a ) s w i t c h g e a r a n d p r o t e c t i o n d e v i c e s( b ) m u l t i p o l e i s o l a t i n g s w i t c h

E X A M P L E S :

T h r e e - p h a s e t r a n s f o r m e r s S i n g l e - p h a s e t r a n s f o r m e r s

enclosure or separation


53/280

SC84-SC87

Purpose Built Container Space(Chapter II-2, Regulation 54)

Reg. 54.1.2.2

A purpose built container space is a cargo fitted with cell guides for stowage securingof containers.

Ro-Ro Cargo Space(Chapter II-2, Regulation 54)

Reg. 54.1.2.3

Ro-ro cargo spaces include special category spaces (Reg. 37) and vehicle deck spaces (54.2.2

and 54.2.3).

Weather Decks(Chapter II-2 Reg. 54)

Table 54.1

For the purposes of Reg. 54 a ro-ro space fully open above and with full openings in both endsmay be treated as a weather deck.

Certification of Carriage of Solid DangerousBulk Cargoes(Chapter II-2 Reg. 54..2 and Reg. 54.3)

Certification for carriage of solid dangerous bulk cargoes covers only those cargoes listedin Appendix B of the BC-Code except cargoes of MHB.

Other solid dangerous bulk cargoes may be certified subject to acceptance by theAdministration

involved.

SC84

IACS Int. 1993

SC85

SC86

SC87


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Fire Water Supply Capacity(Chapter II-2 Reg. 54.2.1)

Total required capacity of fire water supply should satisfy 2.1.2 and 2.1.3 (if applicable) simultaneouslycalculated for the largest designated cargo space.

The capacity requirement should be met by the total capacity of main fire pump(s) not including thecapacity of the emergency fire pump, if fitted.

Ventilation of Cargo SpacesChapter II-2 Reg. 54.2.4)

General: If adjacent spaces are not separated from cargo spaces by gastight bulkheads ordecks, ventilation requirements shall apply as for the cargo space iteself.

Where 2 fans per hold are required in the BC Code, a common ventilation system with 2 fans connectedis acceptable.

Requirements for Individual Cargoes:

a) Mechanical ventilation arranged for continuous operation, i.e. height of ventilation inlets andoutlets must satisfy the requirements of the Load Line Convention for openings not fitted withmeans of closure. Means of closure for fire protection purposes as required by Reg. II-2/16.9must be fitted. The fan should be permanently or being of portable type adapted for beingpermanently fitted prior to loading and during voyage. Cargo holds to be supplied by two fansgiving a ventilation rate of min. 6 airchanges per hour based on the empty hold volume. Therequirements apply to the following cargoes :

Aluminium FerrosiliconAluminium SiliconFerrosiliconZinc Ashes

b) Mechanical ventilation arranged for continuous operation, i.e height of ventilation inlets andoutlets must satisfy the requirements of the Load Line Convention for openings not fitted with means of closure. Means of closure for fire protection purposes as required by Reg. II-2/16.9 must be fitted. The

fan(s) should be permanently fitted or being of portable type adapted for being permanently fittedprior to loading and during voyage. The fan(s) shoud give a ventilation rate of min. 6 airchanges perhour based on the empty hold volume.

The requirements apply to the following cargo:

Seed Cake b and c

SC88-SC89

SC88


SC89(Rev 11996)

SC89-1


55/280

Bilge Drainage

(Chapter II-2 Reg. 54.2.5)

a) Cargo spaces intended for carriage of flammable liquids with flash point less than 23 degrees Cor toxic liquids shall be fitted with a fixed bilge drainage system independent or separated fromthe bilge system in machinery space and located outside of the machinery space.

If a single bilge drainage system completely independent of the machinery space is provided,the system is to comply with the Rule requirement to redundancy and capacity based on thesize of the space or spaces which it services.

b) If the bilge drainage system for cargo spaces is additional to the system served by pumpsin the machinery space, the capacity of the system is to be not less than 10 m3/hr. per cargospace served. If the additional system services more than one cargo space the capacity neednot exceed 25 m3/h. The additional bilge system need not be arranged with redundancy.

Whenever flammable liquids with flash point less than 23 degrees C or toxic liquids are carried,the bilge line into the machinery space shall be separated either by fitting a blank flange or bya closed lockable valve.

c) If bilge drainage of cargo spaces is arramged by gravity drainage, the drainage is to be eitherlead directly overboard or to a closed draintank located outside of machinery spaces. Thetank should be provided with vent pipe to a safe location on the open deck.

d) Encloded spaces outside of machinery spaces containing bilge pumps serving cargo spacesintended for carriage of flammable or toxic liquids shall be fitted with separate mechanicalventilation giving at least 6 airchanges per hour. Electrical equipment in the space is to beaccording to unified interpretation SC79. If the space has access from another enclosed space,the door is to be selfclosing.

e) Drainage from a cargo space into bilge wells in a lower space is only permitted if that spacesatisfies the same requirements as the cargo space above.

Personal Protection -Protective Clothing(Chapter II-2, Regulation 54)

Reg. 54.2.6.1

a) The required protective clothing is for emergency purposes.

b) For solid bulk cargoes the protective clothing is to satisfy the equipment requirementsspecified in Appendix E of the BC Code for the individual substances. For packagedgoods the protective clothing is to satisfy the equipment requirements specified inemergency procedures (EmS) of the Supplement to IMDG Code for the individualsubstances.

SC90-SC91

SC90

IACS Int. 1993

SC91


56/280

Personal Protection -Self-Contained Breathing Apparatus(Chapter II-2, Regulation 54)

Reg. 54.2.6.2

For each of the breathing apparatuses, two complete sets of air bottles are required. These sparebottles are to be in addition to the spare bottles required for fireman's outfit.

SC92

SC92

IACS Int. 1993


57/280

SC93

SC93(19 94 )

IACS Int. 1994

Enclosure of stern tubes on cargo ships(Chapter II-1, Regulation 11.9)

Text:

“Stern tubes shall be enclosed in a watertight space (or spaces) of moderate volume. Other measures tominimise the danger of water penetrating into the ship in case of damage to the stern tube arrangementsmay be taken at the discretion of the Administration”.

Interpretation:

A stern tube enclosed in a watertight space of moderate volume, such as an aft peak tank, where theinboard end of the stern tube extends through the aft peak/engine room watertight bulkhead into theengine room is considered to be an acceptable solution satisfying the requirement of Chapter II-1,Regulation 11.9 of SOLAS 1974, as amended, provided the inboard end of the stern tube is effectivelysealed at the aft peak/engine room bulkhead by means of an approved watertight/oiltight gland system.


58/280

Mechanical and electrical independency ofElectric steering control systems forsteering gears(Chapter II-1, Regulation 29)

1. SCOPE

The interpretation applies to electric/electronic steering gear control systems for the main andauxiliary steering gear, operable from the navigation bridge, for which SOLAS stipulates two steeringgear control systems independent of each other.

Following requirements of :

- SOLAS Chapt. II, Reg. 29, steering gear,- IEC Pub. 92 - 204 Electric and elecktro-hydraulic steering gear (1987)

have been considered, as far as containing requirements for the independency of the controlsystems.

2. BASIC REQUIREMENTS

Two independent steering gear control systems shall be provided and shall be so arranged that amechanical or electrical failure in one of them will not render the other one inoperative.

3. SUPPLY

Each electrical steering gear control system shall be served by its own separate circuit suppliedfrom the steering gear power circuit from a point within the steering gear compartment, or directly fromswitchboard busbars (main and emergency switchboard) supplying that steering gear power circuit at apoint on the switchboard adjacent to the supply to the steering gear power circuit. The power supplysystems are to be protected selectively.

4. INSTALLATION

Cables for duplicated steering gear control systems and their associated components shall beseparated as far as practicable. The corresponding cables shall follow different routes which will beseparated both vertically and horizontally, as far as practicable, throughout their entire length.

5. SEPARATION OF CONTROL SYSTEMS AND COMPONENTS

5.1 GeneralWires, terminals and the components for duplicated steering gear control systems

installed in units, control boxes, switchboards or bridge consoles shall be separated as far as practicable.Where physical separation is not practicable, separation may be achieved by means of a fire retardantplate.

SC94

SC94(19 94 )

IACS Int. 1994


59/280

5.2 Steering wheel or steering lever

All electric components of the steering gear control systems shall be duplicated. This does notrequire duplication of the steering wheel or steering lever.

5.3 Steering mode selector switch

If a joint steering mode selector switch (uniaxial switch) is employed for both steering gearcontrol systems, the connections for the circuits of the control systems are to be divided accordingly andseparated from each other by an isolating plate or by air gap.

5.4 Follow-up amplifier

In the case of double follow-up control (see Annex, example 2), the amplifiers have t be designedand fed so as to be electrically and mechanically separated. In the case of non-follow-up control

and follow-up control, it will have to be ensured that the follow-up amplifier is protected selectively (see

Annex, example 3).

5.5 Additional control systems

Control circuits for additional control systems, e.g. steering Lever or autopilot have to be designedfor all - pole disconnection (see Annex, examples, 1,2 and 3).

5.6 Feed-back units and limit switches

The feed-back units and limit switches, if any, for the steering gear control systems are to beseparated electrically and mechanically connected to the rudder stock or actuator separately.

5.7 Actuators

Actuators controlling the power systems of the steering gear, e.g. magnetic valves, are to be

duplicated and separated.

6. ANNEX

Reference should be made to examples 1,2 and 3, which can be regarded as basic design.

SC94

SC94(C ont’d)

IACS Int. 1994


60/280

IACS Int. 1986

SC94

SC94(19 94 )

IACS Int. 1994

P r i n c i p l e s c h e m e f o r d o

u b l e n o n f o l l o w - u p c o n t r o l

a n d a u t o p i l o t o r o t h e r a d d i t i o n a l c o n t r o l

e m e r g e n c y s w i t c h b o a r d

m a i n s w i t c h b o a r d

t r a n s f e r l i n e

a l a r m

s t a r t e r

b o x 1

s t a r t e r

b o x 2

a l a r m

M 2

M 1

m o t o r f o r

s t e e r i n g g e a r 1

m o t o r f o r


m a g n e t i c v a l v e s


r u

d d e r

m a g n e t i c v a l v e s

s t e e r i n

g g e a r 1

l i m i t s w i t c h e s 1

( f e e d b a c k u n i t )

l i m i t s w i t c h e s 2

( f e e d b a c k u n i �

interpretation solas 2005

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