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Grain (cargo capacity) or Gram
G or GN or GR
Gibraltar - Hamburg range
G.A or GA
G/B or GR/BL
Grain / bale capacity
denotes emissions in grams per tonne of cargo shipped over a kilometre
General Arrangement Plan
General agreement (plain)
General average contribution
General average deposit
Bioactive cleaning agents used in galleys, crew quarters and passenger sections on cruise liners
Garbage Disposal Operations
Whereby the vessel lands a quantity of garbage for transfer to an approved garbage disposal location or facility ashore.
Garbling was the prohibited practice of mixing rubbish with the cargo. A distorted, mixed up message was said to be garbled.
A specialised tanker built to comply with Marpol 73/78 Annex 1 and the appropriate IMO Code for Vessels Carrying Liquefied Gases in bulk.
This refers to a steady state ‘gas free’ condition, meaning the atmosphere in the tank is “safe for man-entry”. The most common value taken for ‘gas free’ is that the atmosphere is below the LEL (Lower Explosive Limit) and that sufficient oxygen is present. Maximum allowable concentrations of any toxins must also be taken into account.
Facilities, which remove liquids from natural gas streams, bear this name. So do processing units in refineries which fractionate the light ends distilled from crude or produced by cracking and other upgrading equipment. In both cases, the plant separates C3 and heavier materials from fuel gas. Some of this hardware cuts as deep as C2. Complex refineries usually have two gas plants. One, the saturates gas plant, handles paraffinic, straight run light ends. The other, the unsaturated gases plant, takes care of olefinic gas streams which come from crackers.
Gas to C4
An abbreviation for the percent mass of the hydrocarbon gases at normal temperature and pressure from C1 to C4 inclusive, present in crude oil.
Good And Safe (Port) Both ENDs
An intermediate distillate product used for diesel fuel, heating fuel and sometimes as feedstock.
A refined petroleum product denser than motor gasoline and kerosene but lighter than residual oil. This hydrocarbon mixture has two common uses: fuel for furnaces and for small diesel engines. It gets several popular names from these applications, including diesel and furnace oil. The phrase distillate fuel distinguishes gasoil from heavier mixtures used in large burners and large, slow diesel engines. The trade frequently shortens this term to distillate. ASTM's designation, No. 2 oil, serves as the primary name for gasoil in some parts of the world, especially North America. The refining industry employs "gasoil" To name certain intermediates in addition to familiar finished fuels. These special usages generally attach, or assume and adjective which indicates the source of the intermediate, such as atmospheric gasoil, vacuum gasoil, coker gasoil, pyrolysis gasoil, and so forth.
Also called gas or petrol, gasoline is a mixture of volatile, flammable liquid hydrocarbons derived from petroleum, with or without small quantities of additives, and used as motor fuel. It is also used as a solvent for oils and fats.
A component in motor gasoline blend added exclusively for volume. Ethanol, for example, often has this limited function in the USA.
Industry–related: A point at which freight moving from one territory to another is interchanged be- tween transportation lines.
General Agreement on Tariffs and Trade
Gross ballast bonus
Government Bill of Lading
Goods in bad order
GC or GENCAR
General cargo charter party
GCN or GNCN or GENCON
GD or GDAY or GDY
Gross Domestic Product
General Department Store Merchandise: A classification of commodities that includes goods generally shipped by mass–merchandise companies. This commodity structure occurs only in service contracts.
Glycol Ether. Manufactured from either propylene oxide or ethylene oxide reacted with an alcohol. They are mainly used as solvents, plasticizers and brake fluids.
A general term for ropes, blocks, tackle and other equipment
Geared Bulk Carriers
Typically in the handysize to handymax size range although there are a small number of geared panamax vessels, like all bulkers they feature a series of holds covered by prominent hatch covers. They have cranes, derricks or conveyors that allow them to load or discharge cargo in ports without shore-based equipment. This gives geared bulkers flexibility in the cargoes they can carry and the routes they can travel.
Bulkers without cranes or conveyors. These ships depend on shore-based equipment at their ports of call for loading and discharging. They range across all sizes, the larger bulk carriers (VLOCs) can only dock at the largest ports, some of these are designed with a single port-to-port trade in mind. The use of gearless bulkers avoids the costs of installing, operating, and maintaining cranes.
General cargo charter party
Gencon'94 charter party
General Average Sacrifice
An extraordinary sacrifice intentionally and reasonably made to preserve from peril the property involved in a common maritime voyage.
Goods unpackaged or packaged, but not shipped in bulk
General Cargo Barge, non propelled
A barge without means of independent propulsion which carries break bulk cargoes, may be single or multi decked.
General Cargo Barge, propelled
An self propelled barge with a single deck for the carriage of various types of dry cargo
General Cargo Carriers
Breakbulk freighters, car carriers, cattle carriers, pallet carriers and timber carriers. A vessel designed to carry heterogeneous mark and count cargoes.
General Cargo Ship
A single or multi deck cargo vessel for the carriage of various types of dry cargo. Single deck vessels will typically have box shaped holds. Cargo is loaded and unloaded through weather deck hatches
General Cargo Ship (with Ro-Ro facility)
A general cargo ship with the additional capability to be loaded and unloaded by ro-ro access to a limited portion of the cargo space
General Cargo, Inland Waterways
A vessel designed for the transportation of Break Bulk Cargoes, May Be Single Or Multi Decked. Not designed for operation in open sea.
General Cargo/Passenger Ship
A general cargo ship with accommodation for the carriage of more than 12 passengers
General Cargo/Passenger Ship, Inland Waterways
A vessel designed for the transportation of dry cargo and with capacity for carriage of passengers. Not designed for operation in open sea
A general cargo ship fitted with tanks for the additional carriage of liquid cargo
General Cargo/Tanker (Container/oil/bulk - COB ship)
A general cargo ship with reversible hatch covers; one side is flush and the other is fitted with baffles for use with liquid cargoes. Containers can be carried on the hatch covers in dry cargo mode
General Purpose Tanker
Tanker ranging in size between 10,000-24,999 DWT
Generator Set (Gen Set)
A portable generator which can be attached to a refrigerated container to power the refrigeration unit during transit.
Capable of causing injury to the genetic component of cells.
GENeralS or general cargo
General Sea Waybill
GEOG RTN or GEOG ROT
In geographical rotation
An isomer differing because of the structural location of certain elements.
Generic Exposure Scenarios
Good fair average
A word derived from the Hindi word ""Chi"" meaning clarified and crystallised butter fat from buffalos or cows milk. Ghee made from buffalos milk is white, whereas that made from cows milk is yellow in colour. These products have a rich and pleasant flavour and have a granular structure. Granularity is considered by the consumers in some tropical countries as an important criterion of quality and purity of these products.
Green House Gas
Global Integrated Shipping Information System
Giving (someone) a Wide Berth
To anchor a ship far enough away from another ship so that they did not hit each other when they swung with the wind or tide.
Gearless or Germanischer Lloyd
Glass Reinforced Plastics
See Unsaturated polyester resins
GLESS or GLS
Global Maritime Intelligence Integration (GMII)
It is within the Office of the Director of National Intelligence, with the mission to ensure govern- ment–wide access to maritime information and data critical to intelligence production and to serve as the focal point and oversight agent for maritime specific information issues.
German Liner Replacement
A tanker for the bulk carriage of glue
An ester formed from glycerol and an organic acid
Natural fats and oils are mixtures of triglycerides. The esters of fatty acids combined with glycerol are often referred to as "triglyceride". Typical fatty acid compositions are tabled in Appendix B. In general solid fats contain a relatively high proportion of the saturated fatty acids and oils contain higher proportions of unsaturated or shorter chain fatty acids.
Glycerol or Glycerine
Glycerol is an important structural component of fats and oils. A complete splitting (hydrolysis) of fats/oils results in glycerol and free fatty acids. Glycerol finds uses as a humectant, a food ingredient, in pharmaceutical products and in explosives. Glycerol can be synthesised from petroleum feedstock.
Any of a class of organic compounds belonging to the alcohol family; in the molecule of a glycol, two hydroxyl (OH) groups are attached to different carbon atoms. The term is often applied to the simplest member of the class, ethylene glycol. See ethylene glycol and propylene glycol.
Glyerol or Glycerine
Glycerol is an important structural compound of fats and oils. A complete splitting by hydrolysis of fats or oils results in glycerol and free fatty acids. Glycerol is used as a humectant, a food ingredient, in pharmaceutical products and in explosives.
General Manager; head of local entity
Ship Stability: Metacentric height; distance from the center of gravity to the transverse metacenter.
Global Maritime Distress and Safety System (IMO)
Guide to Manufacturing & Purchasing Hoses for Offshore Moorings
Greenwich mean time
GN (or GR)
Global Navigation Chart
GNCN or Gencon
German North Sea
In the Far East, a warehouse where goods are stored and delivered.
Gulf of Mexico
Gone by the Board
Anything seen to have gone overboard or spotted floating past the ship (by the board) was considered lost at sea.
The front rails of the chassis that raise above the plane of the chassis and engage in the tunnel of a container leading to the connection to tractor.
Gross operating profit
A natural constituent of cotton seeds which, if transferred to the crude oil, results in colour instability and an oil which is difficult to process. The cooking procedure of the cotton seeds is critical in determining whether gossypol is bound in the meal or transferred to the oil.
Grain capacity. Cubic capacity in 'grain'
General Purposes Committee
Global Petrochemical Competitive Analysis.
Global Positioning System
Grain (Capacity of vessel)
Geographical rotation. Ports in order of calling
A vessel equipped to obtain material from the sea bed by use of a grab or backhoe. The material may be carried on board, transferred to other vessels, pumped ashore or deposited elsewhere using a spray
Grab Dredger Pontoon
A non propelled dredger pontoon fitted with a system of grabs
A swap of one kind of oil for another. Such business involves exchanges like sour crude for sweet and gasoil for gasoline.
Grain Elevating Pontoon, non propelled
A non propelled pontoon used for the purpose of operating a grain elevator
Grain charter party
Agglomeration of crystals resulting in the formation of granules generally visible to the naked eye. There are a number of fat-based products, such as vanaspati and ghee, where a granular structure is very much appreciated by the consumers and is considered as a quality parameter. A granular texture in fat-based products is not only determined by the chemical composition of the fat/fat blends, but also by the way the product is cooled from the melt. Generally, large granules are obtained by slow cooling of the product. Rapid cooling results in smaller crystals and smooth texture.
The density or weight to volume ratio of materials. The oil business usually expresses this quality in API degrees or specific gravity.
A certificate which confirms which materials have been used in a vessel’s construction
Greenhouse gases are those gaseous constituents of the atmosphere, both natural and antropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of infrared radiation emitted by the Earth's surface, the atmosphere and clouds.
General rate of increase
A sailing vessel gripes when, by poor design or imbalance of sail, it tends to end up with its bow into the wind when sailing close-hauled. The sails flap around, forward progress is halted and she is very hard to steer. On land, the term means to complain, complain, complain.
In 1740, British Admiral Vernon (whose nickname was "Old Grogram" for the cloak of grogram which he wore) ordered that the sailors' daily ration of rum be diluted with water. The men called the mixture "grog". A sailor who drank too much grog was"groggy".
Gross Registered Tonnage (GRT)
Gross Register Tonnage. Internal cubic capacity of the ship expressed in tons on the basis of 100 cubic feet per ton. This differs from DWT because it measures the area versus the weight.
NOTE: GRT was replaced by GT back in 1982.
Terms under which the carrier has to arrange and pay for cargo handling
(0.2+0.02*log10V)*V, where V is the volume in cubic metres of all enclosed spaces on board
Gross Tonnage (GT, G.T. or gt)
Gross tonnage is calculated based on "the moulded volume of all enclosed spaces of the ship" and is used to determine things such as a ship's manning regulations, safety rules, registration fees and port dues, whereas the older gross register tonnage is a measure of the volume of certain enclosed spaces.
Applies to vessels, not to cargo, (0.2+0.02 log10V) where V is the volume in cubic meters of all en- closed spaces on the vessel. Since 1994, it replaces “Gross Registered Tonnage.” An approximate conversion ratio is 1NT = 1.7GT and 1GT = 1.5DWT.
NOTE: Gross Tonnage replaced Gross Registered Tonnage back in 1982.
Entire weight of goods, packaging and freight car or container, ready for shipment. Generally, 80,000 pounds maximum container, cargo and tractor for highway transport.
when a vessel strikes the bottom of the sea or channel
Groundnut Oil or Peanut Oil
The oil expressed or extracted from the seed of the groundnut ("Arachis Hypogaea") after removing the husk and the germ. Groundnuts are extensively cultivated in China, India, USA and in a number of African countries, for example Senegal, Nigeria and Sudan. The plant is unusual in pushing its unripe seed into the ground, where ripening takes place. Groundnut oil is a highly prized cooking oil.
A sudden rise of water along the shore. It often happens when the weather is fine and the sea behind it appears calm. Said to occur when undulating water from a far away storm reaches the shoreline where friction causes the swell. In common use, the term groundswell means a growing change in public opinion.
A consolidation service, putting small shipments into containers for shipment.
Geographic Response Plan (generally appended to ACPs)
Geographic Response Strategies (generally appended to ACPs/GRPs)
Good safe always afloat always accessible berth
Good Safe Berth
Good and safe berth always afloat
Good sound merchantable
Good Safe Port
Government selling price. The price of crude or products established by a government marketing company. Sometimes written GEP, for government established price. See posted price.
Good safe port berth
Ports of Genoa, Savona, Spezia or Leghorn
Ports of Genoa, Savona, Spezia, Leghorn, Naples, Civetta or Vecchia
Gross Standard Volume
GT, G.T. or G/T
Refers to any Gas Turbine tanker, i.e. tanker fitted with a Gas Turbine for propulsion.
A seller promises to deliver oil at least as good as the guarantees--guaranteed specifications--he puts on it. When material sells on guarantees, the buyer can refuse to accept it, or demand a price adjustment, if it fails to meet any of them.
The upper edge of a ship’s sides
Gross vehicle weight
Ship Stability: Symbol for righting arm; horizontal distance measured between the vertical lines of forces between G and B. GZ is measured horizontally from G to a point of intersection of the upward line of force from B at a point labeled Z.
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