regulation of the prevention from the oil pollution
gulf of Aden
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
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
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
Cargo / ballast operation
Loading of oil cargo
cleaning of the cargo tank
discharge of water from slope tank
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 .