MARPOL *Annex I (Regulations for the Prevention of Pollution by Oil)

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Marpol

Annexure 1
regulation of the prevention from the oil pollution

Special areas

Mediterranean sea
Baltic sea
Black sea
Red sea
gulf of Aden
gulfs area

PURGING – it is an operation of the introduction of inert gas into the tank with the objective of further reduction of the existing oxygen or CH gas content to a level below which combustion cannot be supported.

LFL- it is the concentration of hydrocarbon in air below which the mixture becomes too lean to initiate or propagate combustion.

HFL-it is the concentration of hydrocarbon in air above which the mixture becomes too thick to initiate or propagate compulsion

EXPLOSIMETER -it indicates hydrocarbon content in air instrument explosimeter consists of a wheatstone bridge.

PSSA – PARTICULARLY SENSITIVE SEA AREA

slop tank – are present on board tankers to store oily water mixture from cargo tank washing.

SOPEP ( SHIP OIL POLLUTION EMERGENCY PLAN)

Master is over on incharge.
It guides the master and other crew members on board ship concerning the steps to be taken in case of oil pollution.

 

ODMCS (OIL DISCHARGE MONITORING AND CONTROL SYSTEM)

it is used to prevent the pollution of ocean by oil due to the discharge from ballast and bilge space consist of 4 essentials systems

first                oil content metre
second.        a flow metre
third.             computing unit
Fourth.         onboard valve unit

 

Clean Ballast 

Ballast tank since oil was carried, has to be cleaned so that it meets some standards like

If it were discharged from a ship which is stationary into the clean calm water on a clear day would not produce visible traces of oil on the surface of water or shorelines.

Ballast is discharged through ODMCS then oil content should not be more then 15PPM to be considered as clean ballast.

 

 

COW(CRUDE OIL WASHING)

-Oil cargos itself is used to wash the tanks

-when all cargo is spread with pressure on the tank walls and the surface, the sediments sticking to the wall dissolves and converts into useful cargo which can be formed out to shore tank

-eliminates the requirement of slop tank

OIL RECORD BOOK
PART 1

FOR ALL SHIPS MACHINERY SPACES

BLASTING AND CLEANING OF OIL FUEL TANKS

DISPOSAL OF OILY REDUCE DISCHARGE OF DIRTY BALLAST OR CLEANING WATERY FROM OIL FUEL TANKS

PART2
Cargo / ballast operation
Loading of oil cargo
unloading
ballasting
cleaning of the cargo tank
discharge of water from slope tank

 

IOPP
INTERNATIONAL OIL POLLUTION PREVENTION CERTIFICATE

It is issued to each new ship after an appointment surveyor has inspected and found it to be in compliance with marpol.
Give details of oils and filtering equipment and also associated monitoring equipment.

 

An oily water separator (OWS) (marine) is a piece of equipment specific to the shipping or marine industry. It is used to separate oil and water mixtures into their separate components. This page deals exclusively oily water separators aboard marine vessels. They are found on board ships where they are used to separate oil from oily wastewater such as bilge water before the wastewater is discharged into the environment. These discharges of wastewater must comply with the requirements laid out in Marpol 73/78.For information on more general oil water separators Oily Water Separators .

working criteria 15 ppm .

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