Please enter a keyword to search or click a letter below to browse the list of abbreviations and definitions through our glossary index.


Search Results for G
  • Grain (cargo capacity) or Gram 
  • G or GN or GR 
    Grain capacity 
  • G-H 
    Ghent/Hamburg (range) 
  • G-H RGE 
    Gibraltar - Hamburg range 
  • G.A or GA 
    General Average 
  • G.B. 
    Great Britain 
  • G/B or GR/BL 
    Grain / bale capacity 
  • g/t-km 
    denotes emissions in grams per tonne of cargo shipped over a kilometre 
  • GA PLAN 
    General Arrangement Plan 
  • GA(P) 
    General agreement (plain) 
  • GA.CON. 
    General average contribution 
  • GA.DEP. 
    General average deposit 
  • GA/(ARB) 
    General average/(arbitration) 
  • GAL 
  • gamazymes 
    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. 
  • Garbled 
    Garbling was the prohibited practice of mixing rubbish with the cargo. A distorted, mixed up message was said to be garbled. 
  • Gas Carrier 
    A specialised tanker built to comply with Marpol 73/78 Annex 1 and the appropriate IMO Code for Vessels Carrying Liquefied Gases in bulk. 
  • Gas Free 
    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 presen
  • Gas plant 
    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
  • 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 
  • Gasoil 
    An intermediate distillate product used for diesel fuel, heating fuel and sometimes as feedstock. 
  • Gasoil 
    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, includi
  • Gasoline 
    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. 
  • Gasoline extender 
    A component in motor gasoline blend added exclusively for volume. Ethanol, for example, often has this limited function in the USA. 
  • Gateway 
    Industry–related: A point at which freight moving from one territory to another is interchanged be- tween transportation lines. 
  • GATT 
    General Agreement on Tariffs and Trade 
  • GBB 
    Gross ballast bonus 
  • GBL 
    Government Bill of Lading 
  • GBO 
    Goods in bad order 
  • GC 
    Great circle 
  • GC or GENCAR 
    General cargo 
  • GCN 
  • GCN 
    General cargo charter party 
  • GCN or GNCN or GENCON 
    General Conditions 
  • GD 
  • GD or GDAY or GDY 
    Good Day 
  • GD/GD 
  • GDP 
    Gross Domestic Product 
  • GDSM 
    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. 
  • GE 
    Glycol Ether. Manufactured from either propylene oxide or ethylene oxide reacted with an alcohol. They are mainly used as solvents, plasticizers and brake fluids. 
  • GEAR 
    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 lo
  • Gearless Carriers 
    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 design
    General cargo charter party 
  • GENCON'94 
    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. 
  • General Cargo 
    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 
  • General Cargo/Tanker 
    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. 
  • Genotoxic 
    Capable of causing injury to the genetic component of cells. 
  • GENS 
    GENeralS or general cargo 
    General Sea Waybill 
  • GEO 
    Geographical (rotation) 
    In geographical rotation 
  • Geometric Isomer 
    An isomer differing because of the structural location of certain elements. 
    Geographical Rotation 
  • GES 
    Generic Exposure Scenarios 
  • GF 
    Government form 
  • GFA 
    Good fair average 
  • Ghee 
    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 flavo
  • GHG 
    Green House Gas 
  • GIB 
  • GISIS 
    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. 
  • GL 
    General Ledger 
  • GL 
    Gearless or Germanischer Lloyd 
  • Glass Reinforced Plastics 
    See Unsaturated polyester resins 
  • GLESS 
  • 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 spe
  • GLR 
    German Liner Replacement 
  • GLS 
  • Glue Tanker 
    A tanker for the bulk carriage of glue 
  • Glyceride 
    An ester formed from glycerol and an organic acid 
  • Glycerides (Triacylgycerols) 
    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 propor
  • 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. G
  • Glycol 
    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
  • 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. 
  • GM 
    General Manager; head of local entity 
  • GM 
    Ship Stability: Metacentric height; distance from the center of gravity to the transverse metacenter. 
  • GM 
  • GMDSS 
    Global Maritime Distress and Safety System (IMO) 
    Guide to Manufacturing & Purchasing Hoses for Offshore Moorings 
  • GMT 
    Greenwich mean time 
  • GN (or GR) 
    Grain (capacity) 
  • GNC 
    Global Navigation Chart 
  • GNCN or Gencon 
    General Conditions 
  • GNS 
    German North Sea 
  • GO 
    Gas oil 
  • Go–Down 
    In the Far East, a warehouse where goods are stored and delivered. 
  • GOM 
    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. 
  • Gooseneck 
    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. 
  • GOP 
    Gross operating profit 
  • Gossypol 
    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 mea
  • GP 
    Grain capacity. Cubic capacity in 'grain' 
  • GP 
    General Purpose 
  • GPC 
    General Purposes Committee 
  • GPCA 
    Global Petrochemical Competitive Analysis.  
  • GPS 
    Global Positioning System 
  • GR 
    Grain (Capacity of vessel) 
  • GR 
    Geographical rotation. Ports in order of calling 
  • GR/BL 
  • Grab Dredger 
    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 
  • Grade trade 
    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 
  • Granularity 
    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 consider
  • Gravity 
    The density or weight to volume ratio of materials. The oil business usually expresses this quality in API degrees or specific gravity. 
  • GRD 
  • Green Passport 
    A certificate which confirms which materials have been used in a vessel’s construction 
  • Greenhouse gases 
    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. 
  • GRI 
    General rate of increase 
  • Gripe 
    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 complai
  • Groggy 
    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. 
  • Gross Terms 
    Terms under which the carrier has to arrange and pay for cargo handling 
  • Gross Tonnage 
    (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
  • Gross Weight 
    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. 
  • Grounding 
    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 Suda
  • Groundswell 
    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
  • Groupage 
    A consolidation service, putting small shipments into containers for shipment. 
  • GRP 
    Geographic Response Plan (generally appended to ACPs) 
  • GRS 
    Geographic Response Strategies (generally appended to ACPs/GRPs) 
    Good safe always afloat always accessible berth 
  • GSB 
    Good Safe Berth 
  • GSBAA 
    Good and safe berth always afloat 
  • GSM 
    Good sound merchantable 
  • GSP 
    Good Safe Port 
  • GSP 
    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. 
  • GSPD 
    Good safe port berth 
  • GSSL 
    Ports of Genoa, Savona, Spezia or Leghorn 
    Ports of Genoa, Savona, Spezia, Leghorn, Naples, Civetta or Vecchia 
  • GSV 
    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. 
  • GTEE 
  • Guar 
  • Guarantees 
    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. 
  • Gunwale 
    The upper edge of a ship’s sides 
  • GVW 
    Gross vehicle weight 
  • GZ 
    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.