MARPOL ANNEX 2
REGULATION FOR CONTROL OF POLLUTION BY NOXIOUS LIQUID SUBSTANCE IN BULK.
APPLICABLE TO:
- ship which carrying noxious liquid substance and chemicals In bulk,
NOT APPLICABLE TO:
- Harmful substances carried in any kind of package.
Liquid substance and chemicals which are carried in bulk annex 2 came into force on 6th April 1987,
Carriage of chemical covers under two main conventions.
- SOLAS CHAPTER 7
- MARPOL ANNEX 2
both of the conventions required chemical tankers which are buit after 1st July 1986 to comply with international bulk chemical code
IBC (INTERNATIONAL BULK CHEMICAL CODE)
- IBC CODE booklet carried all ships which carrying chemicals and noxious liquid substance in bulk by sea.
- It contains some safety standards which are to be maintained while carriage of dangerous chemicals and noxious liquid substance in bulk.
- It also sets out minimum design and construction of these vessel.
- Ibc code contain complete list of chemicals and their environment hazard rating,
- Asper annex 2 noxious liquid substance which are carried by sea are categorised into main categories,
- Based of harm that they can cause to the marine environment.
- Catagory X
- Category Y
- Catagory Z
- Other substances
CATAGORY X
- when discharging into sea from tank cleaning or D-ballasting operation are deemed to present major hazard to the marine environment as well as human health.
- Therefore they are prohibited to discharge into sea.
CATAGORY Y
- when discharging into sea from tank cleaning or D-ballasting operation present in hazard to marine environment.
- But not a major one but still a hazard to the marine environment,
- so therefore some limitations on quantity and quality of discharge of substance into sea
CATEGORY Z
- when discharging into sea from tank cleaning or D-ballasting operation present in minor hazard to the marine environment,
- Therefore there are less stringent restrictions which are to be followed while discharge into sea on quality and quantity.
OTHER SUBSTANCES
- which are carried no harm to the marine environment so no restriction to discharging into sea after tank cleaning or D-ballasting.
PARAMETERS OF DISCHARGING NOXIOUS LIQUID SUBSTANCE IN BULK.
- speed of the vessel while discharging.
- Minimum discharge from the nearest land while discharging.
- Minimum depth of the sea while discharging.
- Weather discharging is being carried out above the water line or below the water line
DISCHARGE CRITERIA
- ship proceeding enrouted
- Speed of the ship minimum 7knots for self propelled ship, for not self propelled ship minimum 4knots
- Should be 12meter or above from the nearest land.
- Discharge through below the water line
- Underwater discharge outlet not exceeding the minimum rate which its designed.
- Depth of the water should not be less than 25 meters,
SPECIAL AREA UNDER ANNEX 2
P AND A MANUAL
- every ship which carry noxious liquid substance in bulk, needs to carry p and manual.
- Which is the procedure and arrangements manual which is approved by administration.
- This manual contain some important guidelines nad operational procedures which needs be followed during cargo handling tank cleaning and slope handling and cargo hold D-ballasting operations.
CARGO RECORD BOOK
- kept in 3 years
- Every ship carry noxious liquid substance should carry cargo record book.
- Each operation should be signed by officer incharge.
- Each page signed by master of the ship.
- Kept in readily available location for inspection.
ENTRIES OF CARGO RECORD BOOK
- loading of cargo.
- Internal transfer cargo during voyage.
- Unloading of cargo.
- Mandatory pre-wash .
- Discharge into sea if tank washing.
- Ballasting of from tank .
- Discharge of ballast water from cargo tank.
- Accidentally or exceptional discharge
- Controlled by authorised survayer
- And additional operational procedures and remarks.
