Dirty ballast is created when seawater is pumped into fuel tanks for the purpose of improving ship stability. In a dirty ballast system, water is added to a fuel tank after most of the fuel is used. Some fuel remaining in the tank mixes with the ballast water, producing “dirty” ballast.
Clean ballast means ballast water carried in a tank which, since it was last used to carry a cargo containing a substance in Category X, Y or Z, has been thoroughly cleaned and the residues resulting there from have been discharged and the tank emptied in accordance with the appropriate requirements of this Annex.
what is a slop tank? Slop tanks are present onboard tanker to store oily water mixture from cargo tank washing. The number of slop tanks depends on the Dead weight Tonnage (DWT) of the vessel. Sludge tank. Located in engine room, this tank is used to store sludge produced after treating fuel or lube oil through purifiers.
In respect to this, what is definition of clean ballast as per Marpol Annex 1?
By the definition given by US coast guard “clean ballast” means: “…ballast in a tank which, since oil last carried in it, has been so cleaned that ballast, if discharged from a stationary vessel into clean, calm water on a clear day, would make no visible traces of oil on the water surface or adjoining shore lines or
What is the purpose of ballast water?
Purpose of Ballast Water Management System onboard cargo ships. Ballast water is carried by ships to maintain stability and seaworthiness, especially when the ship is not carrying cargo. It is estimated that 7000 species of plants, animals and other organisms are transported every day in ballast water.
What is oily mixture?
3 Oily mixture means a mixture with any oil content. 7 Product carrier means an oil tanker engaged in the trade of carrying oil other than crude oil.
What is ballast on a ship?
Ballast is material that is used to provide stability to a vehicle or structure. Ballast, other than cargo, may be placed in a vehicle, often a ship or the gondola of a balloon or airship, to provide stability. Water should move in and out from the ballast tank to balance the ship.
What is Odmcs?
ODMCS (Oil discharge monitoring control system), sometimes also called ODME (Oil discharge monitoring equipment) is an equipment required under Marpol Annex 1 and is required to monitor discharge of oily mixture from cargo tanks of oil tankers.
What is nearest land in Marpol?
Nearest land under MARPOL When discharge standards under MARPOL require you to be a specified distance from the nearest land, the term ‘from nearest land’ generally means from a country’s territorial sea baseline. There is, however, one exception to this general definition.
Why do ships need ballast?
Ships. To provide adequate stability to vessels at sea, ballast weighs the ship down and lowers its centre of gravity. These ballast tanks are connected to pumps that pump water in or out. Crews fill these tanks to add weight to the ship and improve its stability when it isn’t carrying cargo.
What Marpol means?
What is the purpose of oil record book?
Oil record book It is one of the most important documents onboard with a written record for compliance of annex I of MARPOL. When operating oily water separator, 15 ppm equipment for discharging treated bilge water overboard, the operation is recorded with time, position of ship, quantity discharged and retention.
What are the special areas under Marpol?
Special Areas in MARPOL 73/78 The Mediterranean sea area. The Baltic sea area. The Black sea area. The Red sea area. The Gulf area. The Gulf of Aden area. The Antarctic Area. The North-West European Waters.
What is Annex 2 of Marpol?
MARPOL 73/78 Annex II, Regulations for the Control of Pollution by Noxious Liquid Substances in Bulk. 1987 and contains discharge conditions for four categories of noxious substances and requirements applicable to the construction and equipment of ships carrying such substances.
What is heavy weather ballast?
– Heavy Ballast: During the seagoing state, if the ship is not fully loaded, ship ballast tanks are filled to its capacity. This condition is known as a heavy ballast. – Port Ballast: Many ports around the world have a restriction for usage of ballast water.
What are noxious liquid substances?
10 Noxious liquid substance means any substance indicated in the Pollution Category column of chapter 17 or 18 of the International Bulk Chemical Code or provisionally assessed under the provisions of regulation 6.3 as falling into category X, Y or Z.
What are the annexes of Marpol?
The technical requirements of MARPOL are included in six separate Annexes: Annex I—Regulations for the Prevention of Pollution by Oil. Annex II—Regulations for the Control of Pollution by Noxious Liquid Substances in Bulk. Annex III—Prevention of Pollution by Harmful Substances Carried in Sea in Packaged Form.
How do you wash crude oil?
Crude oil washing (COW) is washing out the residue from the oil tanker using the crude oil cargo itself, after the cargo tanks have been emptied. Crude oil is pumped back and preheated in the slop tanks, then sprayed back via high pressure nozzles in the cargo tanks onto the walls of the tank.
What is instantaneous rate of discharge?
Definition of Instantaneous rate of discharge of oil content Instantaneous rate of discharge of oil content means the rate of discharge of oil in litres per hour at any instant divided by the speed of the ship in knots at the same instant.