MSC 85/26/Add.2 ANNEX 3 RESOLUTION MSC.268(85) - US Coast ...

MSC 85/26/Add.2ANNEX 3Page 1282.2 All electrical cables and components situated in cargo spaces and adjacent enclosedspaces are free from defects. Such cables and electrical components are safe for use in anexplosive atmosphere or positively isolated. The provisions of this clause need not applyto engine-rooms where the engine-room is separated from the cargo space by a gastightbulkhead with no direct access.3. The ship shall be suitably fitted and carry on board appropriate instruments for measuringthe following without requiring entry in the cargo space:.1 concentration of methane in the atmosphere;.2 concentration of oxygen in the atmosphere;.3 concentration of carbon monoxide in the atmosphere; and.4 pH value of cargo space bilge samples.4. These instruments shall be regularly serviced and calibrated. Ship personnel shall betrained in the use of such instruments. Details of gas measurement procedures are givenat the end of this appendix.5. It is recommended that means be provided for measuring the temperature of the cargo inthe range 0°C to 100°C to enable the measurement of temperature of the cargo whilebeing loaded and during voyage without requiring entry into the cargo space.6. Smoking and the use of naked flames shall not be permitted in the cargo areas andadjacent spaces and appropriate warning notices shall be posted in conspicuous places.Burning, cutting, chipping, welding or other sources of ignition shall not be permitted inthe vicinity of cargo spaces or in other adjacent spaces, unless the space has been properlyventilated and the methane gas measurements indicate it is safe to do so.7. Prior to departure, the master shall be satisfied that the surface of the material has beentrimmed reasonably level to the boundaries of the cargo space to avoid the formation ofgas pockets and to prevent air from permeating the body of the briquettes. Casingsleading into the cargo space shall be adequately sealed. The shipper shall ensure that themaster receives the necessary co-operation from the loading terminal.8. The atmosphere in the space above the cargo in each space shall be regularly monitoredfor the concentration of methane, oxygen and carbon monoxide. Details of gasmonitoring procedures are given at the end of this appendix. The results of monitoringshall be recorded. The frequency of the monitoring shall be determined based upon theinformation provided by the shipper and the information obtained through the analysis ofthe atmosphere in the cargo space.9. Unless expressly provided otherwise, surface ventilation shall be conducted in all cargospaces carrying this cargo for the first 24 hours after departure from the loading port.During this period, the atmosphere in the cargo spaces shall be monitored once from onesample point per cargo space and for the purpose of the gas monitoring, the ventilationshall be stopped for an appropriate period prior to the gas monitoring.10. When the methane concentrations monitored within 24 hours after departure are at anacceptably low level, the ventilation openings shall be closed and the atmosphere in thecargo spaces shall be monitored. When the methane concentrations monitoredwithin 24 hours after departure are not at an acceptably low level, surface ventilation shallbe maintained, except for an appropriate period for gas monitoring, and the atmosphere inthe cargo spaces shall be monitored. This procedure shall be followed until the methaneconcentrations become acceptably low level. In any event, the atmosphere in the cargospaces shall be monitored on a daily basis.11. When significant concentrations of methane are subsequently observed in unventilatedcargo spaces, the appropriate special precautions for coals emitting methane shall apply.I:\MSC\85\26-Add-2.doc