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Glossary

Maritime glossary, terms beginning with U (page 2)

All maritime glossary terms that begin with the letter U, drawn from every subject section. 1137 entries.

Showing 250 of 1137 terms (page 2 of 5).

UN 1396 X75. IMDG Code, Classes, Packing and Segregation
Aluminium powder uncoated Class 4.3.
UN 1402 X75. IMDG Code, Classes, Packing and Segregation
Calcium carbide Class 4.3.
UN 1438 X75. IMDG Code, Classes, Packing and Segregation
Aluminium nitrate Class 5.1.
UN 1444 X75. IMDG Code, Classes, Packing and Segregation
Ammonium persulfate Class 5.1.
UN 1448 X75. IMDG Code, Classes, Packing and Segregation
Barium permanganate Class 5.1 PG II.
UN 1474 X75. IMDG Code, Classes, Packing and Segregation
Magnesium nitrate Class 5.1 PG III.
UN 1486 X75. IMDG Code, Classes, Packing and Segregation
Potassium nitrate Class 5.1 PG III.
UN 1495 X75. IMDG Code, Classes, Packing and Segregation
Sodium chlorate Class 5.1 PG II.
UN 1498 X75. IMDG Code, Classes, Packing and Segregation
Sodium nitrate Class 5.1 PG III.
UN 1547 X75. IMDG Code, Classes, Packing and Segregation
Aniline Class 6.1 PG II.
UN 1580 X75. IMDG Code, Classes, Packing and Segregation
Chloropicrin Class 6.1 PG I.
UN 1654 X75. IMDG Code, Classes, Packing and Segregation
Nicotine Class 6.1 PG II.
UN 1671 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to phenol, solid, with the molten state carried under proper shipping name provisions.
UN 1680 X75. IMDG Code, Classes, Packing and Segregation
Potassium cyanide solid Class 6.1 PG I.
UN 1689 X75. IMDG Code, Classes, Packing and Segregation
Sodium cyanide solid Class 6.1 PG I.
UN 1715 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to acetic anhydride under the UN Recommendations on the Transport of Dangerous Goods.
UN 1748 X75. IMDG Code, Classes, Packing and Segregation
Calcium hypochlorite dry Class 5.1.
UN 1779 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to formic acid under the UN Recommendations on the Transport of Dangerous Goods.
UN 1789 X75. IMDG Code, Classes, Packing and Segregation
Hydrochloric acid Class 8.
UN 1789 Hydrochloric Acid X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 8 PG II or III.
UN 1791 X75. IMDG Code, Classes, Packing and Segregation
Hypochlorite solution Class 8.
UN 1791 Hypochlorite Solution X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 8 PG II or III.
UN 1805 X75. IMDG Code, Classes, Packing and Segregation
Phosphoric acid solution Class 8 PG III.
UN 1805 Phosphoric Acid Solution X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 8 PG III.
UN 1813 X75. IMDG Code, Classes, Packing and Segregation
Potassium hydroxide solid Class 8 PG II.
UN 1823 X75. IMDG Code, Classes, Packing and Segregation
Sodium hydroxide solid Class 8 PG II.
UN 1824 X75. IMDG Code, Classes, Packing and Segregation
Sodium hydroxide solution Class 8.
UN 1824 Sodium Hydroxide Solution X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 8 PG II or III.
UN 1830 X75. IMDG Code, Classes, Packing and Segregation
Sulfuric acid with more than 51 percent acid Class 8 PG II.
UN 1832 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to spent sulfuric acid under the UN Recommendations.
UN 1845 X75. IMDG Code, Classes, Packing and Segregation
Carbon dioxide solid (dry ice) Class 9.
UN 1888 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to chloroform under the UN Recommendations on the Transport of Dangerous Goods.
UN 1897 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to tetrachloroethylene under the UN Recommendations.
UN 1902 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to diisooctyl acid phosphate under the UN Recommendations.
UN 1917 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to ethyl acrylate, stabilized, under the UN Recommendations.
UN 1919 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to methyl acrylate, stabilized, under the UN Recommendations.
UN 1942 X75. IMDG Code, Classes, Packing and Segregation
Ammonium nitrate Class 5.1.
UN 1942 Ammonium Nitrate X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 5.1 PG III with <0.2 per cent combustible.
UN 1950 Aerosols X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 2 with division based on contents (2.1, 2.2, or 2.3).
UN 1965 Hydrocarbon Gas Mixture Liquefied NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 2.1 LPG mixture.
UN 1972 X75. IMDG Code, Classes, Packing and Segregation
Methane refrigerated liquid or LNG Class 2.1.
UN 1972 Methane Refrigerated Liquid (LNG) X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 2.1.
UN 1977 X75. IMDG Code, Classes, Packing and Segregation
Nitrogen refrigerated liquid Class 2.2.
UN 1977 Nitrogen Refrigerated Liquid X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 2.2 cryogenic.
UN 1978 Propane X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 2.1 flammable liquefied gas.
UN 1986 Alcohols Flammable Toxic NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 3 with subsidiary risk 6.1, PG I, II, or III.
UN 1993 X75. IMDG Code, Classes, Packing and Segregation
Flammable liquid NOS Class 3.
UN 1993 Flammable Liquid NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 3 generic entry.
UN 1999 X75. IMDG Code, Classes, Packing and Segregation
Tars liquid including road oils Class 3.
UN 2014 X75. IMDG Code, Classes, Packing and Segregation
Hydrogen peroxide aqueous solution above 20 percent and not more than 60 percent Class 5.1 with Class 8 subsidiary risk.
UN 2014 Hydrogen Peroxide Aqueous Solution 20-60 Per Cent X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 5.1 with subsidiary 8, PG II.
UN 2031 X75. IMDG Code, Classes, Packing and Segregation
Nitric acid other than red fuming Class 8 with Class 5.1 subsidiary risk for higher concentration.
UN 2031 Nitric Acid X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 8 with subsidiary 5.1 if greater than 65 per cent, PG I or II.
UN 2055 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to styrene monomer, stabilized, under the UN Recommendations.
UN 2059 X75. IMDG Code, Classes, Packing and Segregation
Nitrocellulose solution flammable Class 3.
UN 2187 X75. IMDG Code, Classes, Packing and Segregation
Carbon dioxide refrigerated liquid Class 2.2.
UN 2209 X75. IMDG Code, Classes, Packing and Segregation
Formaldehyde solution Class 8 if less than 25 percent and meeting Class 8 criteria.
UN 2218 X75. IMDG Code, Classes, Packing and Segregation
Acrylic acid stabilized Class 8 with Class 3 subsidiary risk.
UN 2348 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to butyl acrylates, stabilized, under the UN Recommendations.
UN 2447 X75. IMDG Code, Classes, Packing and Segregation
Phosphorus white molten Class 4.2 with Class 6.1 subsidiary risk.
UN 2480 X75. IMDG Code, Classes, Packing and Segregation
Methyl isocyanate Class 6.1 with Class 3 subsidiary risk.
UN 2672 X75. IMDG Code, Classes, Packing and Segregation
Ammonia solution Class 8 between 10 and 35 percent concentration.
UN 2729 X93. IBC Code and Chemical Tanker Operations
United Nations number assigned to hexachlorobenzene under the UN Recommendations.
UN 2735 Amines Liquid Corrosive NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 8 PG I, II, or III.
UN 2761 X75. IMDG Code, Classes, Packing and Segregation
Organochlorine pesticide solid toxic Class 6.1.
UN 2794 X75. IMDG Code, Classes, Packing and Segregation
Batteries wet filled with acid Class 8.
UN 2795 X75. IMDG Code, Classes, Packing and Segregation
Batteries wet filled with alkali Class 8.
UN 2796 X75. IMDG Code, Classes, Packing and Segregation
Sulfuric acid with not more than 51 percent acid or battery fluid acid Class 8.
UN 2800 X75. IMDG Code, Classes, Packing and Segregation
Batteries wet non spillable Class 8.
UN 2809 X75. IMDG Code, Classes, Packing and Segregation
Mercury Class 8 with Class 6.1 subsidiary risk.
UN 2810 Toxic Liquid Organic NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 6.1 PG I, II, or III.
UN 2814 X75. IMDG Code, Classes, Packing and Segregation
Infectious substance affecting humans Class 6.2 Category A.
UN 2814 Infectious Substance Affecting Humans X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 6.2 Category A.
UN 2900 X75. IMDG Code, Classes, Packing and Segregation
Infectious substance affecting animals only Class 6.2 Category A.
UN 2900 Infectious Substance Affecting Animals Only X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 6.2 Category A.
UN 2908 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material excepted package empty packaging Class 7.
UN 2909 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material excepted package articles manufactured from natural uranium Class 7.
UN 2910 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material excepted package limited quantity of material Class 7.
UN 2911 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material excepted package instruments or articles Class 7.
UN 2912 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material LSA-I Class 7.
UN 2915 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material Type A package Class 7.
UN 2916 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material Type B(U) package Class 7.
UN 2917 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material Type B(M) package Class 7.
UN 2978 X75. IMDG Code, Classes, Packing and Segregation
Uranium hexafluoride radioactive material fissile Class 7 with Class 8 subsidiary risk.
UN 3077 X75. IMDG Code, Classes, Packing and Segregation
Environmentally hazardous substance solid NOS Class 9.
UN 3077 Environmentally Hazardous Substance Solid NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9 marine pollutant entry.
UN 3082 X75. IMDG Code, Classes, Packing and Segregation
Environmentally hazardous substance liquid NOS Class 9.
UN 3082 Environmentally Hazardous Substance Liquid NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9 marine pollutant entry.
UN 3089 X75. IMDG Code, Classes, Packing and Segregation
Metal powder flammable NOS Class 4.1.
UN 3090 X75. IMDG Code, Classes, Packing and Segregation
Lithium metal batteries Class 9.
UN 3091 X75. IMDG Code, Classes, Packing and Segregation
Lithium metal batteries contained in or packed with equipment Class 9.
UN 3091 Lithium Metal Batteries Contained in Equipment or Packed with Equipment X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9.
UN 3164 X75. IMDG Code, Classes, Packing and Segregation
Articles pressurized pneumatic or hydraulic containing non flammable gas Class 2.2.
UN 3164 Articles Pressurized Pneumatic or Hydraulic X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 2.2.
UN 3166 Vehicle Flammable Liquid Powered or Flammable Gas Powered X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9 entry for motor vehicles.
UN 3171 X75. IMDG Code, Classes, Packing and Segregation
Battery powered vehicle or battery powered equipment Class 9.
UN 3171 Battery-powered Vehicle X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9 covering electric vehicles transported with installed batteries.
UN 3245 X75. IMDG Code, Classes, Packing and Segregation
Genetically modified microorganisms or organisms Class 9.
UN 3245 Genetically Modified Microorganisms or Organisms X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9.
UN 3257 X75. IMDG Code, Classes, Packing and Segregation
Elevated temperature liquid NOS at or above 100 degrees Celsius and below its flash point Class 9.
UN 3257 Elevated Temperature Liquid NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9, at or above 100 deg C and below its flashpoint.
UN 3258 X75. IMDG Code, Classes, Packing and Segregation
Elevated temperature solid NOS at or above 240 degrees Celsius Class 9.
UN 3258 Elevated Temperature Solid NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9, at or above 240 deg C.
UN 3268 X75. IMDG Code, Classes, Packing and Segregation
Safety devices electrically initiated Class 9.
UN 3291 X75. IMDG Code, Classes, Packing and Segregation
Clinical waste unspecified NOS or regulated medical waste NOS Class 6.2.
UN 3322 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material LSA-III Class 7.
UN 3323 X75. IMDG Code, Classes, Packing and Segregation
Radioactive material Type C package Class 7.
UN 3373 X75. IMDG Code, Classes, Packing and Segregation
Biological substance Category B Class 6.2.
UN 3373 Biological Substance Category B X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 6.2, packed under P650.
UN 3480 X75. IMDG Code, Classes, Packing and Segregation
Lithium ion batteries Class 9.
UN 3480 Lithium-ion Batteries X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9, including lithium-ion polymer.
UN 3481 X75. IMDG Code, Classes, Packing and Segregation
Lithium ion batteries contained in or packed with equipment Class 9.
UN 3481 Lithium-ion Batteries Contained in Equipment or Packed with Equipment X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9.
UN 3500 X75. IMDG Code, Classes, Packing and Segregation
Chemical under pressure NOS Class 2.2.
UN 3528 X75. IMDG Code, Classes, Packing and Segregation
Engine internal combustion flammable liquid powered Class 3.
UN 3528 Engine, Internal Combustion, Flammable Liquid Powered X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 3 entry for standalone engines and machinery.
UN 3529 X75. IMDG Code, Classes, Packing and Segregation
Engine internal combustion flammable gas powered Class 2.1.
UN 3529 Engine, Internal Combustion, Flammable Gas Powered X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 2.1 entry for standalone engines.
UN 3530 Engine, Internal Combustion X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 9 for engines not falling under 3528/3529.
UN 3531 Polymerizing Substance Solid Stabilized NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 4.1.
UN 3532 Polymerizing Substance Liquid Stabilized NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 4.1.
UN 3533 Polymerizing Substance Solid Temperature Controlled NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 4.1.
UN 3534 Polymerizing Substance Liquid Temperature Controlled NOS X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Class 4.1.
UN 3536 X75. IMDG Code, Classes, Packing and Segregation
Lithium batteries installed in cargo transport unit Class 9.
UN 3537 to UN 3548 X75. IMDG Code, Classes, Packing and Segregation
Articles containing dangerous goods NOS series by class.
UN 3549 X75. IMDG Code, Classes, Packing and Segregation
Medical waste Category A affecting humans or animals only solid Class 6.2.
UN Convention against Transnational Organized Crime (UNTOC) E1. Maritime security, geopolitics and risk
Includes migrant-smuggling protocol.
UN Cylinder Mark X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Permanent mark on Class 2 cylinders per 6.2.2 indicating standard, manufacturer, working pressure, and approval.
UN ECE Code 1992 X155. Marine Surveying Practice and Cargo Inspection
The United Nations Economic Commission for Europe Code of Uniform Standards and Procedures for the Performance of Draught Surveys of Coal Cargoes, the global benchmark for draft survey method.
UN Fish Stocks Agreement (1995) X87. Fishing Vessels and Fisheries Management
Agreement for the Implementation of the Provisions of UNCLOS relating to the Conservation and Management of Straddling Fish Stocks and Highly Migratory Fish Stocks, in force from 11 December 2001.
UN Fish Stocks Agreement (UNFSA) D4. Fisheries, aquaculture, blue economy and marine resources
1995 treaty on conservation of straddling and migratory fish stocks.
UN Manual of Tests and Criteria X75. IMDG Code, Classes, Packing and Segregation
UN publication providing classification test methods referenced by IMDG.
UN number C3. Logistics, freight forwarding and multimodal trade
Number identifying dangerous goods under UN model regulations.
UN Ocean Conference X119. Maritime Conferences, Trade Shows and Awards
Multilateral conference convened in 2017, 2022, and 2025 to advance SDG 14.
UN Packaging X75. IMDG Code, Classes, Packing and Segregation
Packaging meeting UN Recommendations performance tests and bearing UN marking.
UN packaging code X6. Container, Intermodal and Trade Codes
Marking on UN-certified packagings for dangerous goods.
UN Portable Tank X75. IMDG Code, Classes, Packing and Segregation
Multimodal tank meeting IMDG Chapter 6.7 design and approval requirements.
UN R134a, R404A etc. X26. Reefer Containers and Cold Chain Logistics
ASHRAE refrigerant numbers; UN dangerous goods numbers differ (e.g., UN 3159 for R134a).
UN R155 X48. Maritime Cybersecurity
United Nations Regulation No. 155 on cybersecurity for road vehicles, often referenced as a precedent for sector specific cyber regulation including discussions in maritime.
UN Recommendations on the Transport of Dangerous Goods X75. IMDG Code, Classes, Packing and Segregation
Orange Book published by UN ECOSOC, foundation for IMDG and other modal codes.
UN Recommendations on the Transport of Dangerous Goods (Model Regulations) X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
The basis for IMDG, ADR, RID, ICAO TI, and IATA DGR, ensuring multimodal harmonisation.
UN Sanctions A7. Compliance, certification and enforcement
Sectoral or country sanctions enforced through Security Council resolutions.
UN Sanctions Committee (1267, 1718, 2231) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes
UNSC subsidiary bodies administering Al-Qaeda/ISIL, DPRK, and Iran sanctions respectively, all with maritime implications.
UN Sanctions Committee (1718/1737/2206 etc.) E1. Maritime security, geopolitics and risk
Subsidiary UNSC bodies on country-specific regimes.
UN Security Council Resolution 1816 X22. Piracy, Maritime Security and Armed Protection
2008 resolution authorizing states cooperating with the Somalia TFG to enter Somali territorial waters in pursuit of pirates.
UN Security Council Resolution 1838 X22. Piracy, Maritime Security and Armed Protection
2008 call on states with naval forces to deploy against piracy off Somalia.
UN Security Council Resolution 1846 X22. Piracy, Maritime Security and Armed Protection
2008 extension of authorities for counter piracy operations off Somalia.
UN Security Council Resolution 1851 X22. Piracy, Maritime Security and Armed Protection
2008 authorization for land based operations against Somali pirates.
UN Security Council Resolution 1897 X22. Piracy, Maritime Security and Armed Protection
2009 renewal of counter piracy authorizations off Somalia.
UN Security Council Resolution 2316 X22. Piracy, Maritime Security and Armed Protection
2016 renewal of counter piracy authorizations.
UN Security Council Resolution 2634 X22. Piracy, Maritime Security and Armed Protection
2022 condemnation of piracy in the Gulf of Guinea.
UN Security Council Sanctions Committees X29. Ship Sale and Purchase, Management Contracts and Valuation
Bodies administering UN designations.
UN Specification Packaging Mark X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
A mark such as "UN 4G/Y15/S/24/D/BAM 1234" denoting packaging type, performance level, gross mass, year, country, and approval reference.
UN-GGIM X73. Marine Hydrography, Charting and ENC
United Nations Committee of Experts on Global Geospatial Information Management, partner of the IHO on marine geospatial data.
UN/CEFACT X15. Ports, Terminals and Stevedoring
UN Centre for Trade Facilitation and Electronic Business, source of port single window standards.
UN/EDIFACT E3. Technology, digitalization and smart shipping
Legacy EDI standard for shipping documents.
UN/LOCODE E3. Technology, digitalization and smart shipping
UN location codes for trade and transport.
UN/SCETDG X75. IMDG Code, Classes, Packing and Segregation
UN Sub Committee of Experts on the Transport of Dangerous Goods, develops the Model Regulations.
Unannounced Inspection X146. Port State Control Regimes, MoUs, and Inspection Systems
An inspection conducted without prior notice, increasingly the norm under the NIR.
Unapproved Yard X28. Ship Recycling and End-of-Life
Recycling facility lacking required HKC or EU SRR authorization for the vessel concerned.
Unattended Bridge X109. Maritime Autonomous Surface Ships and MASS Code
A concept in which the bridge is not continuously manned during certain periods of the voyage, an intermediate step toward higher autonomy degrees.
Unattended Loading Letter X155. Marine Surveying Practice and Cargo Inspection
A protest issued when terminal procedures prevent the surveyor from witnessing all phases of cargo measurement.
Unattended machinery space (UMS) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary
Periodically unattended machinery space arrangements under SOLAS II-1/E with automation, alarms, and fire protection.
Unattended Self-service X41. Cruise Ship Public Health and VSP/USPH
Buffet or station without an attendant, subject to additional barrier and time control measures.
Unbend X3. Ship Handling, Seamanship and Deck Vocabulary
Cast off a rope from a spar; remove a sail.
Unberthing X15. Ports, Terminals and Stevedoring
process of moving a vessel away from the berth.
Unberthing Plan X86. Port Agency, Husbandry and Disbursement
Plan for unberthing maneuvers agreed with pilot and tugs.
Unbonded flexible X42. Offshore Wind Installation and Cable Lay
Reference to flexible pipe construction; conceptually related to dynamic cable construction.
Unbound broker X71. Shipbrokers and Brokerage Firms
Broker without exclusive mandate from any principal in the deal.
Uncertainty Area X80. Maritime Search and Rescue Coordination
Region of positional uncertainty around the datum.
Uncertainty Phase X80. Maritime Search and Rescue Coordination
First IAMSAR emergency phase reflecting concern about a vessel.
UNCITRAL X114. Maritime Arbitration and Shipping Law Firms
United Nations Commission on International Trade Law, drafter of the UNCITRAL Model Law and UNCITRAL Arbitration Rules.
UNCITRAL Arbitration Rules X51. Maritime Arbitration, Law and BIMCO Clauses
The UN procedural rules for ad hoc arbitration, frequently selected in offshore and shipbuilding contracts.
UNCITRAL Arbitration Rules (2013 revision) X152. Maritime Arbitration and Dispute Resolution
Incorporates the UNCITRAL Rules on Transparency for investor-state cases initiated under treaties concluded on or after 1 April 2014.
UNCITRAL Arbitration Rules 1976 X152. Maritime Arbitration and Dispute Resolution
Original ad hoc rules later revised in 2010.
UNCITRAL Arbitration Rules 2010 X152. Maritime Arbitration and Dispute Resolution
Revised ad hoc rules used widely in international and maritime references, including by parties on the LMAA Terms.
UNCITRAL Arbitration Rules 2013 X114. Maritime Arbitration and Shipping Law Firms
Rules used by ad hoc arbitrations including some maritime disputes.
UNCITRAL Model Law X51. Maritime Arbitration, Law and BIMCO Clauses
The model statute on international commercial arbitration adopted by Singapore, Hong Kong, and many other seats.
UNCITRAL Model Law (1985 amended 2006) X152. Maritime Arbitration and Dispute Resolution
Model legislative text adopted by over 80 jurisdictions, basis for Hong Kong, Singapore, German, and other arbitration laws.
UNCITRAL Model Law on Arbitration 1985 X143. Landmark Maritime Law Cases and Doctrines
Influential framework, adopted with modifications in Singapore and Hong Kong.
UNCITRAL Model Law on International Commercial Arbitration X114. Maritime Arbitration and Shipping Law Firms
Adopted on 21 June 1985 and amended in 2006, basis for arbitration statutes in 88 jurisdictions.
UNCITRAL Notes on Organising Arbitral Proceedings X152. Maritime Arbitration and Dispute Resolution
Soft-law guidance on procedural design.
UNCL X84. Yacht Racing, Regattas and Sailing Governance
Union Nationale pour la Course au Large, the French national offshore racing body and co-administrator of the IRC rule.
UNCLOS A6. Public international law of the sea
United Nations Convention on the Law of the Sea, 1982.
UNCLOS 1982 X22. Piracy, Maritime Security and Armed Protection
United Nations Convention on the Law of the Sea providing the piracy definition in Article 101.
UNCLOS Article 100 X127. Maritime Security, Anti-Piracy and PMSCs
Duty of all states to cooperate in the repression of piracy on the high seas.
UNCLOS Article 101 X127. Maritime Security, Anti-Piracy and PMSCs
Definition of piracy.
UNCLOS Article 102 X127. Maritime Security, Anti-Piracy and PMSCs
Piracy by warship, government ship or government aircraft whose crew has mutinied.
UNCLOS Article 103 X127. Maritime Security, Anti-Piracy and PMSCs
Definition of a pirate ship or aircraft.
UNCLOS Article 104 X127. Maritime Security, Anti-Piracy and PMSCs
Retention or loss of nationality of a pirate ship.
UNCLOS Article 105 X127. Maritime Security, Anti-Piracy and PMSCs
Seizure of a pirate ship, vesting universal jurisdiction in the courts of the seizing state.
UNCLOS Article 106 X127. Maritime Security, Anti-Piracy and PMSCs
Liability for seizure without adequate grounds.
UNCLOS Article 107 X127. Maritime Security, Anti-Piracy and PMSCs
Ships and aircraft entitled to seize on account of piracy.
UNCLOS Article 110 E2. Naval, defence and maritime law enforcement
Right of visit on the high seas.
UNCLOS Article 111 X127. Maritime Security, Anti-Piracy and PMSCs
Right of hot pursuit.
UNCLOS Article 112 X122. Submarine Cable Laying, Repair Vessels and Operators
Right to lay submarine cables and pipelines on the bed of the high seas beyond the continental shelf.
UNCLOS Article 113 X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
Provision requiring states to criminalize willful or negligent breaking of submarine cables and pipelines by persons under their jurisdiction.
UNCLOS Article 114 X122. Submarine Cable Laying, Repair Vessels and Operators
Liability of a cable owner who damages another cable while laying or repairing for the cost of the repairs.
UNCLOS Article 115 X122. Submarine Cable Laying, Repair Vessels and Operators
Compensation for vessels that sacrifice anchor, net or fishing gear to avoid damaging a submarine cable.
UNCLOS Article 217 X163. Marine Accident Investigation Agencies and Landmark Inquiries
UNCLOS provision on enforcement by flag States in respect of pollution from vessels including the obligation to investigate alleged violations.
UNCLOS Article 234 X27. Polar Code, Ice Navigation and Polar Operations
Permits coastal states to adopt non-discriminatory laws for ice-covered areas in EEZ; basis of Russian and Canadian Arctic legislation.
UNCLOS Article 76 D2. Hydrography, tides, waves, bathymetry and marine geology
Provision defining the outer limits of the continental shelf.
UNCLOS Article 79 X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
Provision granting coastal states the right to take reasonable measures concerning pipelines on their continental shelf, subject to other states' freedom to lay cables.
UNCLOS Article 88 E2. Naval, defence and maritime law enforcement
High seas reserved for peaceful purposes.
UNCLOS Article 91 X98. Ship Registries and Flag States
Provision requiring a genuine link between a flag state and the ships it registers.
UNCLOS Article 94 X163. Marine Accident Investigation Agencies and Landmark Inquiries
United Nations Convention on the Law of the Sea provision setting flag State duties including the duty in Article 94(7) to cause an inquiry into specified casualties.
UNCLOS Article 95 E2. Naval, defence and maritime law enforcement
Immunity of warships on the high seas.
UNCLOS Article 96 E2. Naval, defence and maritime law enforcement
Immunity of government non-commercial ships.
UNCLOS Linkage X158. IMO Conventions, Protocols, Codes, and Resolutions
Provisions throughout the United Nations Convention on the Law of the Sea referencing competent international organizations, generally understood to mean IMO for shipping matters.
UNCLOS Part V (EEZ) X87. Fishing Vessels and Fisheries Management
Provisions of the 1982 Convention establishing the regime of the Exclusive Economic Zone for fisheries.
UNCLOS Part VII (High Seas) X87. Fishing Vessels and Fisheries Management
Provisions of the 1982 Convention on high seas freedoms including fishing.
Uncompliant Fuel Notification X115. Marine Bunker and Cargo Surveying
Communication to flag state or port state when fuel sulfur exceeds the applicable cap.
Unconfirmed Booking X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA
The SIRE 2.0 booking state pending confirmation of inspector availability.
Uncrewed Surface Vehicle (USV) D5. Coastal processes, sea-level, cryosphere and ocean observation science
Autonomous surface vessel for observation.
UNCTAD Draught Survey Procedure X115. Marine Bunker and Cargo Surveying
Procedure for performing draft surveys published by the United Nations Conference on Trade and Development.
UNCTAD port performance indicators C4. Ports, terminals and coastal/marine civil engineering
KPIs for port performance benchmarking.
UNCTAD Review of Maritime Transport F5. The Reference Layer: Glossary, Units, Signals and Information Sources
Annual UN reference publication.
UNCTAD Review of Maritime Transport Launch X119. Maritime Conferences, Trade Shows and Awards
Annual Geneva launch event for the flagship UNCTAD shipping report.
Under bare poles X3. Ship Handling, Seamanship and Deck Vocabulary
Running before a gale with no sail set.
Under deck X3. Ship Handling, Seamanship and Deck Vocabulary
Below the weather deck.
Under Keel Clearance Pilot X159. Marine Pilotage, Pilot Districts, and Pilots' Associations
Pilot endorsement issued where dynamic UKC management is critical, particularly Pilbara iron-ore ports.
Under pilotage X32. Marine Pilotage and Pilot Operations
Status of a vessel from pilot embarkation to pilot disembarkation.
Under way X3. Ship Handling, Seamanship and Deck Vocabulary
Not moored, at anchor, or aground.
Under-deck lashing X76. Stevedoring, Lashing and Cargo Securing
Securing of containers within holds, generally relying on cell guides and base twistlocks rather than rods.
Under-ice fauna X10. Marine Biology, Fisheries and Oceanography
Organisms inhabiting the underside of sea ice.
Under-keel clearance X32. Marine Pilotage and Pilot Operations
UKC, key safety margin verified during pilotage of deep-draft vessels.
Under-Protection X100. Marine Cathodic Protection and Anodes
A condition of less negative potential than the CP criterion, indicating insufficient protective current.
Underdeck Cargo X157. Marine Loss Adjusters, GA Practice, and Casualty Firms
Cargo stowed below deck, attracting full Hague-Visby protections; deck cargo may be excluded.
Underdeck Cleaning X118. Ship Recycling Yards, Beaches and Regulation
Manual cleaning of underdeck stiffeners before hot work, often a labor-intensive pre-cutting step.
Underdeck Clearance X14. Offshore Oil and Gas Marine Operations
See Air Gap.
Underdeck Inspection X155. Marine Surveying Practice and Cargo Inspection
A close visual examination of structural members under the main deck, including beam knees and bracket toes.
Underdeck Longitudinal Gauge X96. Hull Integrity Monitoring and Strain Gauges
Strain gauge bonded to a longitudinal stiffener beneath the main deck for hull girder bending measurement.
Underdeck piping X56. LNG/LPG Carriers and IGC Code
Cargo piping routed inside a trunk deck or under deck on some LPG vessels for thermal protection.
Underdeck Sealing X13. Marine Salvage and Wreck Removal
Inserting patches under deck plating to recover buoyancy.
Underdeck shaft tunnel X38. Propellers, Stern Gear and Shaft Lines
Compartment housing the intermediate shaft on some RoRo and naval ships.
Underdeck stow X26. Reefer Containers and Cold Chain Logistics
Reefer slot in vessel hold, generally lower ambient and shielded from solar gain.
Underdeck Stowage X9. Cargo Securing, Lashing and Stability Vocabulary
Cargo carried below the weather deck.
Underdeck Stowage Project X104. Project Cargo Forwarders and Heavy Transport
Stowage of project units in the holds of a heavy lift vessel.