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 U
  • U-bend specimen 
    Horseshoe-shaped test piece used to detect the susceptibility of a material to stress corrosion cracking 
  • U.K.f.o. 
    United Kingdom for orders 
  • U.K.H.A.D. 
    United Kingdom and Le Havre-Antwerp-Dunkirk range 
  • U.K.H.H. 
    United Kingdom and Le Havre-Hamburg range 
  • U/C 
  • U/D 
    Under deck 
  • U/on deck 
    Under or on deck 
  • UAE 
    United Arab Emirates 
  • UBA 
    Umweltbundesambt (German Federal Environment Bureau) 
  • UCP 
    Uniform Customs and Practice for Documentary Credits: Published by the In- ternational Chamber of Commerce. This is the most frequently used standard for making payments in international trade; e.g., paying on a Letter of Credit. It is most frequently ref
  • UER 
    Undesired Event Report 
  • UFC 
    Uniform Freight Classification 
  • UH 
    Upper hold 
  • UHF 
    Ultra High Frequency Band Radio 
  • UK 
    United Kingdom 
  • UK/CONT 
    United Kingdom / continent range 
  • UK/Cont (B.H.) 
    United Kingdom or Continent (Bordeaux-Hamburg range) 
  • UK/Cont (G.H.) 
    United Kingdom or Continent (Gibraltar-Hamburg range) 
  • UK/Cont (H.H.) 
    United Kingdom or Continent (Le Havre-Hamburg range) 
  • UKC 
    Under Keel Clearance or United Kingdom / Continent 
  • UKCS 
    United Kingdom Continental Shelf 
  • ULBC 
    Ultra Large Bulk Carrier 
  • ULCC 
    Ultra large crude carrier. The largest tankers. AFRA defines them as 320,000 DWT and larger. Most folks use the term a little less precisely. They might use it for ships as small as 300,000 or even 280,000 tons. 
  • Ullage 
    The difference between the total volume of a tank and the volume of the material it is presently holding. 
  • Ultraviolet Radiation 
    The visible light is only a small fraction of the spectrum of electromagnetic waves. Waves with wavelength shorter than the visible violet are generally called ""ultraviolet radiation"". Ultraviolet radiation is the electromagnetic wave in the range betwe
  • UMS 
    Unmanned Machinery Space 
  • UMS 
    Unleaded Motor Spirits 
  • UN 
    Shaft Tunnel (OCIMF acronym) 
  • UN Number (United National Serial Number) 
    These are assigned to cargoes by the United Nations Committee of Experts on the Transport of Dangerous Goods. 
    United Nations EDI for Administration, Commerce and Transport. EDI Standards are developed and supported by the UN for electronic message (data) interchange on an international level. 
    United Nations’ Commission on International Trade Law 
  • Unclaimed Freight 
    Freight that has not been called for or picked up by the consignee or owner. 
    United Nations’ Commission on Trade and Development 
  • UND 
  • Under the Weather 
    If a crewman is standing watch on the weather side of the bow, he will be subject to the constant beating of the sea and the ocean spray. He will be under the weather. 
  • Undercharge 
    To charge less than the proper amount. 
  • Underkeel Clearance 
    the distance between the bottom of the ship and the sea or channel floor directly under the vessel 
  • Underwater System 
    An underwater system 
  • Underway 
    A vessel is underway when it is not at anchor, made fast to the shore, or aground. 
    United Nations Framework Convention on Climate Change 
  • Unicool 
    Barwil Unitor’s maritime refrigerants 
  • Uniform corrosion 
    Corrosion proceeding at almost the same rate over the whole surface of the metal exposed to the corrosive environment 
  • Uniform Customs and Practices for Documentary Credits (UCP) 
    Rules for letters of credit drawn up by the Commission on Banking Technique and Practices of the International Chamber of Commerce in consultation with the banking associations of many coun- tries. See Terms of Payment. 
  • Unit 
    A major piece of refining equipment. Any collection of machinery worthy of this title includes the complete set of hardware necessary to perform a process step. A crude distillation unit, for instance, incorporates a furnace, a fractionation tower, and al
  • Unit Load 
    Packages loaded on a pallet, in a crate or any other way that enables them to be handled at one time as a unit. 
  • Unit Train 
    A train of a specified number of railcars, perhaps 100, which remain as a unit for a designated destination or until a change in routing is made. 
  • Unitization 
    – The consolidation of a quantity of individual items into one large shipping unit for easier handling. – Loading one or more large items of cargo onto a single piece of equipment, such as a pallet. 
  • UNL 
  • Unless Sooner Commenced 
    UNLESS SOONER COMMENCED shall mean that if turn-time has not expired but loading or discharging is carried out, Laytime shall commence. 
  • Unless sooner commenced, in which case actual time used to count 
    UNLESS SOONER COMMENCED, IN WHICH CASE ACTUAL TIME USED TO COUNT shall mean that actual time used during turn-time shall count as Laytime. 
  • Unless Used  
    UNLESS USED shall mean that if Laytime has commenced but loading or discharging is carried out during excepted periods, actual time used shall count as Laytime. 
  • Unloading 
    Removal of a shipment from a vessel. 
  • UNQT 
  • Unsaponifiable Matter 
    The term refers to material present in oils and fats which, after saponification of the oil or fat by alkali, is extractable by solvent and remains nonvolatile on drying. Unsaponifiable matter generally constitutes less than 1% in most oils and fats. It c
  • Unsaturated Fatty Acids 
    Fatty acids containing one or more double bonds. Oleic, linoleic and linolenic acids are the most common naturally occurring unsaturated fatty acids in animal and vegetable fats and oils. 
  • Unsaturated Gases 
    Light ends produced by refinery cracking units, particularly catalytic crackers and cokers. “Unsaturated” indicates the high olefins content of these gases. They ordinarily go to their own separation unit, plainly labeled an unsaturate gas plant, to avoid
  • Unsaturates 
    Hydrocarbons containing double or triple bonds. Olefins and aromatics which feature carbon-carbon double bonds have particular importance in the oil industry. 
  • Unseaworthiness 
    Unfitness of a ship for a particular voyage with a particular cargo. This can be a function of many variables, including but not limited to insufficient crew stores or fuel, machinery or equipment failure, or unfitness (unclean tanks) to receive or carry
  • uPES 
    Unsaturated Polyester Resins 
  • UPR 
    Unsaturated Polyester Resins. Durable, resinous polymers. They are used over a broad spread of industries, mainly the construction, boat building, automotive and electrical industries. In most applications they are reinforced with small glass fibers - hen
  • Upstream 
    A relative term which locates one point closer to origins than another. Crude distillation lies upstream of conversion processing, for example. The opposite of downstream. 
  • Urea Carrier 
    A single deck cargo vessel for the carriage of urea in bulk. May be self discharging 
  • US 
    United States 
  • US Consular Invoice 
    A document required on merchandise imported into the United States. 
  • USA 
    United States of America 
  • USAC 
    United States Atlantic Coast 
  • USC 
    Unless sooner commenced 
  • USCG 
    United States Coast Guard 
  • USCG Number (US Coast Guard Number) 
    These are cargo compatibility groups assigned by the US Coast Guard in Code of Federal Regulations CFR 46 Part 150. 
  • USD 
    United States Dollar 
  • USDA 
    United States Department of Agriculture 
  • USEC 
    United States East Coast 
  • USFWS 
    United States Fish and Wildlife Service 
  • USG 
    United States Gulf of Mexico 
  • USNH 
    United States North of Cape Hatteras 
    United States North Pacific 
  • USNP 
    United States North Pacific 
  • USP 
    US Pharmacopoeia 
  • USPE 
    Unsaturated Polyester Resins 
  • USPPI – United States Principal Party of Interest 
    The party that receives the primary benefit from an export transaction, usually the seller of the goods. 
  • USSA 
    United States Salvage Association 
  • USSH 
    United States South of (Cape) Hatteras 
  • USWC or USWE 
    United States West Coast 
  • UTC 
    Coordinated Universal Time (Greenwich Mean Time)  
  • Utility Vessel 
    A small multi functional response vessel not dedicated to a particular function 
  • UU 
    Unless Used 
    Unless Used/If used (in which Case) Actual Time Used To Count 
    Unless Used (Which Case) Actual Time Used To Count 
    Unless Used If Used Actual Time Used To Count 
    Unless Used In Which Case Time Actually Used To Count 
  • UW 
    Underwriter(s). The party(s) who agrees to compensate another firm, usually a cargo owner or shipowner, for loss from an insured peril in consideration of payment of a premium.