Abbreviations & Definitions
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Abbreviation
Definition
Diver 
D or DPT  Depth 
D&H  Dangerous and Hazardous (cargo) 
d.p.  Direct port 
D/A  Disbursement Account 
D/C  Deviation clause; (in) direct continuation 
D/E  Deemed/Earned 
D/P  Discharging Port, Documents against payment 
D/R/D  Dunnage, removal and disposal 
DA or D/A  Disbursement Account
On the Ship – Owner's instruction the agent in charge of the ship will have to pay, at the expense of the ship, all established duties and dues of the port as well as cover bills for work and services done on the master's demand. On the basis of the bills for the services, the agent draws a consolidated bill, which is known as Disbursement Account. The agent will submit this account to the ship-owner. The Disbursement Account should be drawn up properly and accompanied by documented proof for each item of expense.  
DAA  Discharge always afloat 
DAF  Previous terms eliminated from Incoterms 2000

DAF – Delivered At Frontier (named place of delivery)
This term can be used when the goods are transported by rail and road. The seller pays for transportation to the named place of delivery at the frontier. The buyer arranges for customs clearance and pays for transportation from the frontier to his factory. The passing of risk occurs at the frontier. 
DAF (Delivered At Frontier) (...Named Place)  A Term of Sale which means the sell- ers fulfill their obligation to deliver when the goods have been made available, cleared for export, at the named point and placed at the frontier, but before the customs Terms of Sale border of the adjoining country. 
Damages for Detention  Penalty if cargo is not ready when 
DAMFORDET  Damages for Detention 
DAP  Diamonium Phosphate 
DAP  Delivered at Place (named place of destination)
Seller pays for carriage to the named place, except for costs related to import clearance, and assumes all risks prior to the point that the goods are ready for unloading by the buyer.

Incoterms 2010 
DAP or DAPS  Days all Purposes (Total days for loading & discharging) 
DAT  Delivered at Terminal (named terminal at port or place of destination)
Seller pays for carriage to the terminal, except for costs related to import clearance, and assumes all risks up to the point that the goods are unloaded at the terminal.

Incoterms 2010 
Day  DAY shall mean a period of twenty-four (24) consecutive hours. Any part of a Day shall be counted pro-rata. 
DB  Double Bottom 
DBA  Doing Business As: A legal term for conducting business under a registered name. 
DBB  Deals, battens and boards 
DBE  Despatch payable both ends 
DBEATS  Despatch (payable) both ends, all time saved 
DBEWTS  Despatch (payable) both ends, working time saved 
DBL  Double 
DBL SKIN  DouBLe SKINned 
DBT s  Double Bottom Tank 
DC  Discharge Capacity 
DD  Dry Dock or Daily Discharge 
DDC  Destination Delivery Charge: A charge, based on container size, that is applied in many tariffs to cargo. This charge is considered accessorial and is added to the base ocean freight. This charge covers crane lifts off the vessel, drayage of the container within the terminal and gate fees at the terminal operation. 
DDC  Deck Decompression Chamber 
DDO  Despatch discharging only 
DDP  Delivered Duty Paid (named place of destination)
Seller is responsible for delivering the goods to the named place in the country of the buyer, and pays all costs in bringing the goods to the destination including import duties and taxes. This term places the maximum obligations on the seller and minimum obligations on the buyer.

Incoterms 2010 
DDP (Delivered Duty paid) (...Named Port of Destination)  “Delivered Duty Paid” means that the seller fulfills his obligation to deliver when the goods have been made avail- able at the named place in the country of importation. The seller has to bear the risks and costs, including duties, taxes and other charges of delivering the goods thereto, clear for importation. While the EXW term represents the minimum obligation for the seller, DDP represents the maximum. 
DDP/(U)  Delivered Duty Paid (Unpaid) 
DDU  Previous terms eliminated from Incoterms 2000

Delivered Duty Unpaid (named place of destination)
This term means that the seller delivers the goods to the buyer to the named place of destination in the contract of sale. The goods are not cleared for import or unloaded from any form of transport at the place of destination. The buyer is responsible for the costs and risks for the unloading, duty and any subsequent delivery beyond the place of destination. However, if the buyer wishes the seller to bear cost and risks associated with the import clearance, duty, unloading and subsequent delivery beyond the place of destination, then this all needs to be explicitly agreed upon in the contract of sale. 
DDU (Delivered Duty Unpaid) (...Named Port of Destination)  A Term of Sale where the seller fulfills his obligation to deliver when the goods have been made available at the named place in the country of importation. The seller has to bear the costs and risks involved in bringing the goods thereto (excluding duties, taxes and other official charges payable upon importation) as well as the costs and risks of carrying out customs formali- ties. The buyer has to pay any additional costs and to bear any risks caused by failure to clear the goods for in time. 
DE  Design and Equipment 
DE  Deck (OCIMF acronym) 
De-Slopping  Whereby a vessel discharges a quantity of slops to a dedicated slop receiving vessel within Port Limits or at a safe anchorage. 
De-Storing Operations  Whereby a vessel lands a quantity of items for the purpose of repair or storage ashore, or crew effects for personnel assigned to the vessel. 
DEA  Diethanolamine. See ethanolamine 
Deadhead  One leg of a move without a paying cargo load.Usually refers to repositioning an empty piece of equipment 
Deadweight Cargo  A long ton of cargo that can be stowed in less than 40 cubic feet. 
Deadweight tonnage (DWT)  The standard measure of ships' carrying capacity. The trade usually abbreviates this term to speak simply of tankers "deadweight." This specification reports total weight, usually in long tons, of fresh water, stores, bunkers, and cargo a vessel can carry. For oil tankers, cargo averages 95 to 96 percent of the total. 
Debottlenecking  Increasing production capacity of existing facilities through the modification of existing equipment to remove throughput restrictions. Debottlenecking generally increases capacity for a fraction of the cost of building new facilities. 
DEC  De-ratting exemption certificate 
Deck Barge  Deck barges are flat barges that are able to transport unusually bulky cargoes. 
Deck Cargo Pontoon, non propelled  A non propelled pontoon for the carriage of general deck cargoes 
Deck Cargo Pontoon, semi submersible  A non propelled semi submersible pontoon for the carriage of general deck cargoes 
Deck Cargo Ship  A vessel arranged for carrying unitised cargo on deck only. Access may be by use of a ro-ro ramp 
Deck Officer  Officer responsible for the safe navigation of a ship, as well as communications and safe loading, carriage and discharging of cargo and ship stability. 
Decomposition products  Products of a chemical or thermal break-down of a substance. 
Deconsolidation Point  Place where loose or other non–containerized cargo is ungrouped for delivery. 
Decontamination  The removal of dangerous goods from personnel and equipment to the extent necessary to prevent potential adverse health effects. Always avoid direct or indirect contact with dangerous goods; however, if contact occurs, personnel should be decontaminated as soon as possible. Since the methods used to decontaminate personnel and equipment differ from one chemical to another, contact the chemical manufacturer, through CANUTEC, CHEMTREC®, CHEM-TEL, SETIQ or CECOM to determine the appropriate procedure. Contaminated clothing and equipment should be removed after use and stored in a controlled area (hot zone) until cleanup procedures can be initiated. In some cases, protective clothing and equipment cannot be decontaminated and must be disposed of in a proper manner. 
Deep Draft  The "deep draft" of a vessel is measured from the surface of the water to the deepest part of the hull below the surface. 
DEF  Definitely 
Defatting  The removal of natural oils from the skin by a fat-dissolving solvent 
Deficit Weight  The weight by which a shipment is less than the minimum weight. 
DEG  Diethylene Glycol 
Degaussing Vessel  A naval vessel that can neutralise the magnetic field of a vessel. Used in magnetic mine detection 
DEGBE  Diethylene Glycol Butyl Ether 
DEGBEA  Diethylene Glycol Butyl Ether Acetate 
DEGMBE  Diethylene Glycol Monobutyl Ether 
DEGMME  Diethylene Blycol Monomethyl Ether 
Degummed Oil  The product resulting from washing crude vegetable oil with water and/or steam for a specified period of time and then centrifuging the oil-and-water mixture to remove the phosphatides etc. The US Bureau of the Census requires crushers degumming crude soyabean oil to report the production of crude oil in terms of degummed weight. 
Degumming  All fats and oils contain small quantities of various non-glyceride entities. Included in this group are complex organo-phosphorus compounds referred to as phosphatides or more usually as gums. They are removed during processing by a variety of treatments collectively referred to as ""degumming"". The treatment applied varies but usually involves hydration with water, orthophosphoric acid, polybasic organic acids either singly or in combination, followed by centrifuging the precipitated material or by its adsorption on a bleaching earth or filter. 
Dehydrogenation  An organic chemical reaction in which a pair of hydrogen atoms are removed from a molecule. 
DEL or DELY  Delivery 
DEL or DLT  Delete 
Delayed coker  A coking unit (coker) which provides a drum where heated molecules crack and coke forms. 
Delayed lung injury  A condition in which there is a delay (usually hours or a few days) between acute exposure to a chemical and the subsequent development of lung injury. 
Delivery Instructions  Order to pick up goods at a named place and deliver them to a pier. Usually issued by exporter to trucker but may apply to a railroad, which completes delivery by land. Use is limited to a few major U.S. ports. Also known as shipping delivery order. 
DEM  Demurrage (Quay Rent) 
DEM-DESP  Demurrage and dispatch 
DEMDES  Demurrage/Despatch money. (Under vessel chartering terms, the amount to be paid if the ship is loading/discharging slower/faster than foreseen.) 
Demurrage  The cost of delaying a ship. Busy channels, occupied berths, commercial considerations, lack of shore tankage, pumping limitations, and a host of other eventualities related to how or where a charterer uses a vessel can prevent it from loading or unloading promptly. When they do, the ship's owner charges for a waiting time.

Shall mean an agreed amount payable to the owner in respect of delay to the Vessel once the Laytime has expired, for which the owner is not responsible. Demurrage shall not be subject to exceptions which apply to Laytime unless specifically stated in the Charter Party. 
Demurrage  (Quay Rent). Money paid by the shipper for the occupying port space beyond a specified _Free Time period. 
Density  The mass of a substance per unit volume. The density of a substance is usually compared to water, which has a density of 1. Substances which float on water have densities less than 1; substances which sink have densities greater than 1 
Density  A descripton of oil by some measurement of its volume to weight ratio. The industry usually relies on two expressions of oil's volume-weight relationship-specific gravity and API degrees. The larger a specific gravity number and the smaller an API number, the denser the oil. 
Density (liter weight in air)  Density is the mass of a unit volume of a substance. The density of an oil or fat is usually measured by determining its specific gravity. 
Density / Specific Gravity  Tank cleaning: Is the ratio of the mass of a volume of a product to the mass of an equal volume of freshwater (1.0). For a product with limited or no solubility in water the specific gravity indicates whether the product will float on water or sink. 
Deodorization  Deodorisation is the removal of those trace components, present in all edible oils, which give rise to odours and flavours. Accomplished by the application of heat, steam and vacuum, deodorisation should be the final stage of treatment before packing or despatch. 
Depot, Container  Container freight station or a designated area where empty containers can be picked up or dropped off. 
Depth  The depth to which a ship is immersed in water. 
DEQ  Previous terms eliminated from Incoterms 2000

DEQ – Delivered Ex Quay (named port of delivery)
This is similar to DES, but the passing of risk does not occur until the goods have been unloaded at the port of destination. 
DEQ (Delivered Ex Quay, [Duty Paid]) (...Named Port of Destination)  A Term of Sale which means the DDU term has been fulfilled when the goods have been available to the buyer on the quay (wharf) at the named port of destination, cleared for importa- tion. The seller has to bear all risks and costs including duties, taxes and other charges of delivering the goods thereto. 
DER or DR or DRK or DRRKS  Derrick(s) 
Dermatitis  An inflammation of the skin 
DES  Despatch 
DES  Previous terms eliminated from Incoterms 2000

DES – Delivered Ex Ship (named port of delivery)
Where goods are delivered ex ship, the passing of risk does not occur until the ship has arrived at the named port of destination and the goods made available for unloading to the buyer. The seller pays the same freight and insurance costs as he would under a CIF arrangement. Unlike CFR and CIF terms, the seller has agreed to bear not just cost, but also Risk and Title up to the arrival of the vessel at the named port. Costs for unloading the goods and any duties, taxes, etc… are for the Buyer. A commonly used term in shipping bulk commodities, such as coal, grain, dry chemicals - - - and where the seller either owns or has chartered, their own vessel. 
DES (Delivered Ex Ship) (...Named Port of Destination)  A Term of Sale where the seller fulfills his/her obligation to deliver when the goods have been made available to the buyer on board the ship, uncleared for import at the named port of destination. The seller has to bear all the costs and risks involved in bringing the goods to the named port destination. 
Desalination Pontoon, non propelled  A non propelled pontoon for the provision of desalination facilities 
Design Draft  The design draft of a vessel is the maximum draft a vessel could potentially reach fully loaded whereas the operating draft is the typical draft that is employed since it is rare that vessels will sail at their maximum design draft. 
DESP  Dispatch 
Despatch on all time saved  DESPATCH ON ALL TIME SAVED shall mean that Despatch Money shall be payable for the time from the completion of loading or discharging to the expiry of the Laytime including periods excepted from the Laytime. 
Despatch on all workding time saved or Despatch on all time saved  DESPATCH ON ALL WORKING TIME SAVED or ON ALL LAYTIME SAVED shall mean that Despatch Money shall be payable for the time from the completion of loading or discharging until the expiry of the Laytime excluding any periods excepted from the Laytime. 
Despatch or Despatch Money  DESPATCH MONEY or DESPATCH shall mean an agreed amount payable by the owner if the Vessel completes loading or discharging before the Laytime has expired. 
Destination  – The place to which a shipment is consigned.
– The place where carrier actually turns over cargo to consignee or his agent. 
Destination Control Statements  Various statements that the U.S. government requires to be displayed on export shipments. The statements specify the authorized destinations. 
Destroyer  A combat vessel, which is small, fast, highly manoeuverable. Armed with guns, torpedoes, depth charges, and guided missiles 
DET  Detention 
DET Detention  (See DAMFORDET) 
Det Norske Veritas  A Norwegian classification society which certifies seagoing vessels for compliance to standardized rules regarding construction and maintenance. 
DETA  Diethylenetriamine. See ethyleneamines 
Detention  A penalty charge against shippers or consignees for delaying carrier’s equipment beyond allowed time. Demurrage applies to cargo; detention applies to equipment. See Per Diem. 
Detergent  In simple terms a detergent is an aid to separation whether it be the separation of soil from a piece of cloth or the separation of olein from stearin in a fractionation plant. Alternatively classified as surface active agents, they work by lowering surface tension forces between two phases, in so doing allowing the more complete removal of the unwanted entity. 
Deterioration  Chemically, oils and fats are quite stable, neutral substances. However, during storage and transport two types of deterioration can occur - a. Oxidation by atmospheric oxygen. This reaction is accelerated by high temperature, strong light and the presence of catalytic trace metals. b. Hydrolysis, resulting in splitting of the neutral fat to give free fatty acids. This is accelerated by the presence of water, by high temperature and by microbiological agents such as moulds and yeasts. Deterioration causes colour and flavour changes (rancidity) which eventually renders an oil unsuitable for food use. 
DETS or DTLS  Details 
Devanning  The unloading of a container or cargo van. 
Developmental toxicity  Capable of causing abnormalities in the implantation of the developing conceptus and/or causing structural or injury to the foetus. 
DF  Dead Freight or Direction Finder 
DF Car  Damage–Free Car. Boxcars equipped with special bracing material. 
DFD  Demurrage, free dispatch 
DFDE propulsion  DFDE propulsion is a relatively new technology for LNG carriers. Utilising electrical generators to drive the propeller, DFDE vessels are more fuel efficient and have lower carbon emissions compared to the conventional steam propelled vessels. The DFDE propulsion system uses either oil or gas, depending on the situation. It uses an electric motor like large cruise ships and submarines, not a steam turbine, which is the traditional propulsion system for LNG carriers. The DFDE propulsion system improves fuel efficiency, reacts quickly, and provides a smooth voyage. 
DFT or DRFT  Draft (also spelt, draught) 
DH  Double hull 
DHD  Demurrage, half dispatch; Despatch money payable at half demurrage rate 
DHDATSBE  Dispatch Half Demurrage on All Time Saved Both Ends 
DHDATSBENDS  Demurrage Half Dispatch on All Time Saved Both Ends 
DHDLTSBENDS  Demurrage Half Dispatch on Laytime Saved Both Ends 
DHDWTSBE  Dispatch Half Demurrage on Working Time Saved Both Ends 
DHDWTSBENDS  Demurrage Half Dispatch on Working TIme Saved Both Ends 
DIA  Diameter 
Dibasic Acids  Refers to acids with two carboxyl groups, of which the most common have the general structure HOOC(CH2)nCOOH. They include (value of n in parenthesis): oxalic* (0), malonic* (1), succinic* (2), glutaric* (3), adipic* (4), suberic* (6), azelaic (7), sebacic (8), dodecanedioic* (10) and brassylic* (11). Systematic names such as nonanedioic acid indicate the presence of two carboxyl groups and the total number of carbon atoms in each molecule (in this case nine). Some of these are used in the production of polyesters and poly-amides. (*Azelaic, brassylic and sebacic are the only commercial dibasic acids from natural sources). 
Diethylene glycol  Diethylene glycol is a colorless liquid used as a solvent and in the manufacture of unsaturated polyester resins, polyurethanes and plasticizers. 
Diethylene glycol ether acetates  Glycol ethers are manufactured from either propylene oxide or ethylene oxide reacted with an alcohol. Glycol ethers and glycol ethers acetates are both hydrophilic (soluble in water) and lipophilic (soluble in oils). They are excellent co-solvents, enabling non-miscible substances to be mixed with each other. They are mainly used as solvents, plasticizers and brake fluids, and in the composition of products such as cleaning and household products, glues, inks etc..  
Diethylene glycol ethers  Glycol ethers are manufactured from either propylene oxide or ethylene oxide reacted with an alcohol. Glycol ethers and glycol ethers acetates are both hydrophilic (soluble in water) and lipophilic (soluble in oils). They are excellent co-solvents, enabling non-miscible substances to be mixed with each other. They are mainly used as solvents, plasticizers and brake fluids, and in the composition of products such as cleaning and household products, glues, inks etc..  
Differential  An amount added or deducted from base rate to make a rate to or from some other point or via an- other route. 
Digylceride  The ester resulting from the chemical combination of glycerol and two fatty acids. 
Dilation/Dilatometry  When an oil or fat is heated it expands and the expansion is called dilation. Dilation is the change in volume with varying temperature. The technique of observation is termed dilatometry. From the dilation observed on warming a solidified fat to a defined temperature, the solid's content at that temperature can be calculated. Dilatometry has been much used in the oils and fats industry for determining solid fat contents or indices of ingredients and blends in margarine and shortening manufacture. This technique has now been mainly replaced by solid fat content measurement using nuclear magnetic resonance spectrometry. 
DIM or DIMS  Dimension(s) 
Dipropylene glycol  One member of the propylene glycols family, the most important of which is monopropylene glycol. Dipropylene glycol is used primarily as an industrial intermediate, but is also used as a substance in consumer products, and as an ingredient in pesticidal formulations. Uses of dipropylene glycol as a substance capitalize on its superior performance as a plasticizer as well as properties that permit dipropylene glycol to act as a functional ingredient of fluids. 
Dipropylene glycol ether acetate  Glycol ethers are manufactured from either propylene oxide or ethylene oxide reacted with an alcohol. Glycol ethers and glycol ethers acetates are both hydrophilic (soluble in water) and lipophilic (soluble in oils). They are excellent co-solvents, enabling non-miscible substances to be mixed with each other. They are mainly used as solvents, plasticizers and brake fluids, and in the composition of products such as cleaning and household products, glues, inks etc.. 
Dipropylene glycol ethers  Glycol ethers are manufactured from either propylene oxide or ethylene oxide reacted with an alcohol. Glycol ethers and glycol ethers acetates are both hydrophilic (soluble in water) and lipophilic (soluble in oils). They are excellent co-solvents, enabling non-miscible substances to be mixed with each other. They are mainly used as solvents, plasticizers and brake fluids, and in the composition of products such as cleaning and household products, glues, inks etc.. 
DIR  Direction 
DirectENC  DirectENC or dENC is a chart format which is specific to ECDIS or ECS systems that use the SevenCs EC2007 ECDIS Kernel AND that have been enabled by their manufacturer for SENC data. 
DIRTY  Crude black oil 
Dirty Tanker  MR 25-60
Panamax 60-80
Aframax 80-120
Suezmax 120-180
VLCC 180-350
ULCC 350 and up
 
DIS  Danish International Ship Register 
Disbursements  Expenses incurred in a port against the general expenses of the vessel these include wages , loading and /or discharging bunkers, water, provisions, customs clearance, port and quay dues, pilotage, tugs and other pertinent costs. 
DISCH  Discharge 
Discrepancy Letter of Credit  When documents presented do not conform to the requirements of the letter of credit (L/C), it is referred to as a “discrepancy.” Banks will not process L/C’s which have discrepancies. They will refer the situation back to the buyer and/or seller and await further instructions. 
DISP  Displacement 
Dispatch  See Despatch. 
Displacement  The weight, in tons of 2,240 pounds, of the vessel and its contents. Calculated by dividing the volume of water displaced in cubic feet by 35, the average density of sea water. 
Disponent Owner  Company that control the commercial operation of a vessel under a bareboat or Time charter party. The person who by reason of a contract or charter party assumes responsibility for a vessel as if he were the owner. 
DISPORT  Discharge port 
Distillate  The liquid obtained through distillation. 
Distillation  Process in oil refining where heat is used to separate the various components of crude oil. Because each component has a different boiling point, gradual heating allows them to be separated through evaporation and collection of the vapors. 
Distillation curve  The boiling temperature distribution of a material's component molecules. Tests report this characteristic as temperature at which various percentages of a sample have boiled or as the percentages which have boiled at various temperatures. 
Distillation unit  separation equipment that heats a mixture and divides its ingredients according to the temperature where they boil. 
Distiller  see DISTILLATION UNIT. A term most often used as shorthand for "crude oil distillation unit." 
Distributors  Inland wholesalers. 
Diversion  A change made either in the route of a shipment in transit (see Reconsignment) or of the entire ship. 
Diving Support Platform, semi submersible  A semi submersible diving support platform 
Diving Support Vessel  A vessel primarily equipped with decompression chambers for air dive operation. Does not include vessels which can only operate submersibles 
Diving Vessel, Naval Auxiliary  A naval auxiliary vessel designed and fitted with equipment to support diver operations. May have cranes for construction/maintenance work. 
Division  Carriers’ practice of dividing revenue received from rates where joint hauls are involved. This is usually according to agreed formulae. 
DK  Deck 
DLOP  Dropping last outward pilot 
DLOSP  Dropping last outward sea pilot 
DLY  Daily 
DNRCAOSLONL  Discountless and Non-Returnable Cargo and/or Ship Lost or Not Lost. (ie for the payment of voyage freight in the charter party) 
DNRSAOCLONL  Discountless and Non-Returnable Ship and/or Cargo Lost or Not Lost 
DNV  Det Norske Veritas (Norwegian Class Society) 
DO  Diesel Oil or Delivery Order 
DOC  Document of compliance (ISM) 
Dock  – For ships, a cargo handling area parallel to the shoreline where a vessel normally ties up.
– For land transportation, a loading or unloading platform at an industrial location or carrier terminal. 
Dock Gate  A dock gate 
Dock Receipt  A form used to acknowledge receipt of cargo and often serves as basis for preparation of the ocean bill of lading. 
Dockage  Refers to the charge assessed against the vessel for berthing at the facility or for morring to a vessel so berthed. 
Docket  Present a rate proposal to a conference meeting for adoption as a conference group rate. 
Doctor test  An indicator to detect the presence of significant amounts of mercaptan sulfur in light hydrocarbon mixture. Materials passing this test carry the designation, "Doctor negative." Doctor negative stocks have sufficiently low mercaptan levels for use in motor gasoline. Doctor positive materials do not necessarily have too much mercaptan, but may require a more quantitative test. 
Documents Against Acceptance (D/A)  Instructions given by a shipper to a bank indicating that documents transferring title to goods should be delivered to the buyer only upon the buyer’s acceptance of the attached draft. 
Documents Against Payment (D/P)  An indication on a draft that the documents attached are to be released to the drawee only on pay- ment. 
DOHP  Dropping outward harbor pilot 
Dolly  A set of wheels that support the front of a container; used when the automotive unit is disconnected. 
DOLSP  Dropping Off Last Sea Pilot (Norway) 
Door–to–Door  Through transportation of a container and its contents from consignor to consignee. Also known as House to House. Not necessarily a through rate. 
DOP  Dropping outward pilot 
DOS  Declaration of Security 
DOS  Declaration of Security 
DOSP  Dropping outward sea pilot 
DOT  Department of Transportation 
Double bond  The chemical bond between two carbon atoms can involve one, two or three pairs of electrons, producing a single (C-C), double (C=C) or triple (C≡C) bond. While the extra pairs of electrons give the bond more energy they also make it more chemically reactive. 
Downstream  A relative term, which indicates greater removal from origins than some point of reference. For example, a petrochemical plant which cracks naphtha lies downstream from a refinery. Money made by marketing products constitutes downstream profits compared to earnings on crude sales. The opposite of upstream. 
DP  Dynamic Positioning - DP allows a vessel to remain in the same location, even in harsh weather, through the combined use of rudders, thrusters, propellers, a position reference system and a computer. 
DP or DYNPOS  Dynamic Positioning 
DPA  Designated person ashore (ISM) 
DPD  Discharge port disbursements 
DPGEE  Dipropylene Glycol Ethyl Ether 
DPGME  Dipropylene Glycol Methyl Ether 
DPK  Dual-purpose kerosene. Product suitable for use as burning kerosene and aviation turbine fuel. 
DPOR  Division of Parks and Outdoor Recreation (ADNR) 
DPP  Dirty petroleum products 
Draft  The distance between a ship's keel and waterline. The lowest part of a vessel lies this far below the surface of the water. Every ship's draft changes with the amount of cargo aboard it, its trim and the temperature and salt content of the water in which it floats. A ship reaches its deepest draft when fully laden in warm fresh water. The shipping industry calls that distance "tropical fresh" or "TF" draft. "Fresh" (F),"tropical"(T), "summer" (s), and "winter"(W) report increasingly shallow drafts for a vessel; reflecting denser and denser water. 
DRAFT  Depth to which a ship is immersed in water. The depth varies according to the design of the ship and will be greater or lesser depending not only on the weight of the ship and everything on board, but also on the density of the water in which the ship is lying 
Draft or Draught  The draft (or draught) of a vessel is one of the most common pieces of information used in Corps navigation studies and can be defined as the distance between the waterline and the bottom of the ship’s hull (keel) (see Figure A-1). In other words, it is the amount of water needed to for a ship to navigate safely. Channel deepening projects generally require a thorough analysis of vessel drafts. There is an important distinction between a vessel’s design draft and its operating draft. The design draft of a vessel is the maximum draft a vessel could potentially reach fully loaded whereas the operating draft (as required for most Corps studies) examines the typical draft that is employed since it is rare that vessels will sail at their maximum design draft 
DRAFT or DRAUGHT  Depth of water from waterline to lowest point of vessel's hull 
Draft, Bank  An order issued by a seller against a purchaser; directs payment, usually through an intermediary bank. Typical bank drafts are negotiable instruments and are similar in many ways to checks on checking accounts in a bank. 
Draft, Clean  A draft to which no documents are attached. 
Draft, Date  A draft that matures on a fixed date, regardless of the time of acceptance. 
Draft, Discounted  A time draft under a letter of credit that has been accepted and purchased by a bank at a discount. 
Draft, Sight  A draft payable on demand upon presentation. 
Draft, Time  A draft that matures at a fixed or determinable time after presentation or acceptance. 
DRATE  Discharge rate 
Drawback  A partial refund of an import fee. Refund usually results because goods are re–exported from the country that collected the fee. 
Drawee  The individual or firm that issues a draft and thus stands to receive payment. 
Drayage  Charge made for local hauling by dray or truck. Same as Cartage. 
DRC  Daily running cost 
Dredger (unspecified)  A vessel equipped to obtain material from the sea bed by an unspecified means. The material may be carried on board, transferred to other vessels, pumped ashore or deposited elsewhere using a spray 
Dredging Pontoon, unknown dredging type  A non propelled pontoon with an unknown dredging mechanism 
Dredging, Inland Waterways  A vessel designed for dredging operations. Not designed for operation in open sea 
Dressing Down  Thin and worn sails were often treated with oil or wax to renew their effectiveness. This was called "dressing down". An officer or sailor who was reprimanded or scolded received a dressing down. 
DRFS  Destination Rail Freight Station. Same as CFS at destination, except a DRFS is operated by the rail carrier participating in the shipment. 
DRFT  Draft 
DRI  Direct reduced iron 
Drilling  Process of boring a hole into the earth to remove oil and gas. 
Drilling Rig, jack up  A jack up offshore drilling rig 
Drilling Rig, semi submersible  A semi submersible offshore drilling rig. 
Drilling Ship  A vessel primarily equipped for offshore drilling operations. May also be able to obtain cores for research purposes 
DRK  Derrick Materials of various types, often timber or matting, placed among the cargo for separation, and hence 
Drop Point  The drop point is an analysis related to the melting point of oils and fats. The sample is solidified in a small cup with a hole. As the cup is warmed and as the fat starts to melt a drop is formed. The drop point is the temperature at which the drop falls freely. 
DRX  Hellenic Drachma (currency) 
Dry Cargo  Cargo that is not liquid and normally does not require temperature control. 
Dry Cargo Barge  Dry cargo barges, or hopper barges, transport solid cargo commodities like grain, coal, sugar, sand, gravel, etc. Depending on the cargo, dry cargo barges may be open or covered. For example, sugar would likely be transported in a covered hopper barge, while sand could be carried in an open dry cargo barge. 
Dry chemical  A preparation designed for fighting fires involving flammable liquids, pyrophoric substances and electrical equipment. Common types contain sodium bicarbonate or potassium bicarbonate. 
Dry–Bulk Container  A container constructed to carry grain, powder and other free–flowing solids in bulk. Used in conjunction with a tilt chassis or platform. 
Drydock  Dock area that is drained of water so a ship can be repaired or serviced below the waterline. Ships are also built in drydocks. 
Drying Oils  Oils that have the ability to polymerize or "dry" by oxidation after they have been applied to a surface to form tough, adherent, impervious and abrasive resistant film. Their film forming properties are closely related to their degree of unsaturation. Typical commercial drying oils are linseed oil and tung oil. 
DS  Double Side 
DSC  Digital Selective Calling 
DSC  Dangerous Goods, Solid Cargoes and Containers 
DSL  Direct Shuttle Loading - Use of two submerged turret loading systems for direct loading of oil, eliminating the need for a storage vessel. 
DSRK  Deutche-Schiffs-Revision Und-Klassifkation 
DSU  Delay in Startup Insurance is a policy to protect the seller of a construction project from penalties if the project is not completed on time. See “Liquidated Damages.” 
DSV  Diving System 
DT  Deep Tank 
Dumping  Attempting to import merchandise into a country at a price less than the fair market value, usually through subsidy by exporting country. 
Dunnage  Protection from damage, for ventilation and, in the case of certain cargoes, to provide space in which the types of a fork lift truck may be inserted. 
DUR  Duration 
Dutch Courage  Dates to the 1600s Anglo-Dutch wars and was likely British propaganda claiming that the Dutch troops were so cowardly they wouldn’t fight unless fortified with copious amounts of schnapps. The term has come to mean false courage induced by drink, or the drink itself. 
Dutiable Value  The amount on which an Ad Valorem or customs duty is calculated. 
DWA  Dock water allowance 
DWAT (or DWT)  Deadweight. Weight of cargo, stores and water, i.e. the difference between lightship and loaded displacement 
DWAT or DWT  DeadWeight All Told or DeadWeight Tonnage of a vessel. Weight of cargo, stores and water, i.e. the difference between lightship and loaded displacement 
DWCC  Deadweight cargo capacity 
DWCT  Deadweight cargo tons 
DWOC  Decline without counter 
DWT  Deadweight Tonnage-the carrying capacity of a vessel in tons (most references now show metric tons). It is the difference between the light and loaded displacement (weight of the ship itself vs. ship plus cargo, fuel, stores and water).