Glossary

Maritime glossary, terms beginning with N

All maritime glossary terms that begin with the letter N, drawn from every subject section. 1500 entries.

Showing 250 of 1500 terms (page 1 of 6).

9% Nickel steel B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: ASTM A553 plate for LNG/liquid hydrogen tanks.
N Class Jackup X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Keppel FELS harsh-environment N Class jackup designed for Northern European waters.
N-2000 Floatel X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: GVA-derived semisubmersible accommodation unit design used in the North Sea.
n-Heptane addition X47. Marine Fuel Quality and ISO 8217: Reagent step in spot test or sediment procedures used to precipitate asphaltenes.
N-Hull Submarine X91. Submarines and Submarine Cable Systems: Sometimes-used reference to nuclear-powered hull types.
N-KOM X113. Drydock and Ship Repair Yards: Nakilat Keppel Offshore & Marine joint venture operating the Erhama Bin Jaber Al Jalahma Shipyard at Ras Laffan, Qatar.
N. B. Palmer X133. Polar Research Vessels and Polar Code Regimes: RVIB Nathaniel B. Palmer, USAP polar research icebreaker since 1992, ABS Polar Class.
N.O.S. X75. IMDG Code, Classes, Packing and Segregation: Not Otherwise Specified, qualifier for generic UN entries such as UN 1992 Flammable Liquid Toxic NOS.
N.O.S. Entry X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: A "Not Otherwise Specified" generic entry in the DGL requiring the technical name in parentheses after the PSN per special provision 274.
N*✠ X142. Classification Societies and Class Notations: RINA principal class symbol for hull classed by Registro Italiano Navale.
N2 D2. Hydrography, tides, waves, bathymetry and marine geology: Larger lunar elliptic semi-diurnal tidal constituent with period 12.66 hours.
N2 Generator X20. LNG Operations and Custody Transfer: Onboard membrane PSA nitrogen unit (Air Products, Generon) providing inter-barrier purge gas.
N2 Quality X20. LNG Operations and Custody Transfer: 97 percent minimum N2 purity for insulation space top-up per CCS designer recommendations.
N2O X111. Methanol, Ammonia and Alternative Marine Fuels: Nitrous oxide, an ozone-depleting greenhouse gas with global warming potential exceeding 200 times that of CO2 over 100 years per IPCC AR6, a concern in ammonia combustion.
N2O (Nitrous oxide) X34. Decarbonization, Alternative Fuels and Carbon Pricing: Greenhouse gas with GWP-100 of 265 under AR6; emitted from ammonia combustion and SCR.
Naantali X85. Ferries, Ro-Pax Operators and Routes: Finnish Turku-area port hosting Finnlines services to Kapellskar and Langnas.
NABL accredited laboratory X147. Ship Recycling, Hong Kong Convention, and Recycling Yards: An Indian-recognized lab analyzing onboard samples for IHM compilation.
NABOS X133. Polar Research Vessels and Polar Code Regimes: Nansen and Amundsen Basins Observational System, US-led Arctic Ocean cruise series.
NABU X57. Ocean Energy Beyond Wind: German conservation association that has commented extensively on offshore renewable and CCS environmental impacts.
NACE X45. Marine Paints, Coatings and Antifouling: National Association of Corrosion Engineers, now part of the Association for Materials Protection and Performance (AMPP).
NACE CIP X88. Marine Surface Preparation and Coatings Application: Coating Inspector Program administered originally by NACE International and now by AMPP, comprising Level 1, Level 2, Level 3, and Senior Certified Coating Inspector.
NACE Coating Inspector X43. Marine Surveying and Warranty Surveying: A coating inspection professional certified by the Association for Materials Protection and Performance (formerly NACE International) frequently engaged in newbuilding paint surveys.
NACE coatings X147. Ship Recycling, Hong Kong Convention, and Recycling Yards: Industrial coatings whose constituents may be listed in IHM Part I if they contain controlled substances.
NACE Inspector X5. Marine Surveying and Inspection: Coating inspector certified under NACE (now AMPP) program.
NACE International X88. Marine Surface Preparation and Coatings Application: Professional organization founded in 1943 as the National Association of Corrosion Engineers, merged with SSPC in 2021 to form AMPP.
NACE MR0175 (sour service) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Material standard relevant to FPSO retrofit.
NACE No. 1 / SSPC-SP 5 X45. Marine Paints, Coatings and Antifouling: White Metal Blast Cleaning, equivalent to ISO 8501-1 Sa 3.
NACE No. 2 / SSPC-SP 10 X45. Marine Paints, Coatings and Antifouling: Near-White Metal Blast Cleaning, equivalent to ISO 8501-1 Sa 2.5.
NACE No. 3 / SSPC-SP 6 X45. Marine Paints, Coatings and Antifouling: Commercial Blast Cleaning, equivalent to ISO 8501-1 Sa 2.
NACE No. 4 / SSPC-SP 7 X45. Marine Paints, Coatings and Antifouling: Brush-Off Blast Cleaning, equivalent to ISO 8501-1 Sa 1.
NACE RP0387 X100. Marine Cathodic Protection and Anodes: The NACE practice for sacrificial anode casting quality.
NACE RP0492 X100. Marine Cathodic Protection and Anodes: The NACE recommended practice for marine cathodic protection maintenance.
NACE SP0169 X100. Marine Cathodic Protection and Anodes: The NACE standard practice giving cathodic protection criteria for buried or submerged metallic piping, including the -800 mV vs Ag/AgCl seawater criterion adopted for marine steel.
NACE SP0176 X100. Marine Cathodic Protection and Anodes: The NACE standard for corrosion control of submerged areas of permanently installed steel offshore structures.
NACE SP0188 X88. Marine Surface Preparation and Coatings Application: Standard practice for discontinuity (holiday) testing of new protective coatings on conductive substrates.
NACE SP0204 X100. Marine Cathodic Protection and Anodes: The NACE standard practice on marine cathodic protection design considerations.
NACE SP0387 X100. Marine Cathodic Protection and Anodes: The NACE standard on metallurgical and inspection requirements for cast sacrificial anodes.
NACE SP0408 X100. Marine Cathodic Protection and Anodes: The NACE standard for cathodic protection of reinforcing steel in buried or submerged concrete structures.
NACE/AMPP CIP X45. Marine Paints, Coatings and Antifouling: Coating Inspector Program offering certifications widely accepted for marine and offshore coatings inspection.
Nacelle X42. Offshore Wind Installation and Cable Lay: Housing on top of a wind turbine tower containing the drive train, generator, and converter.
Nacelle Lift X104. Project Cargo Forwarders and Heavy Transport: Heavy lift of a wind turbine nacelle onto its tower, typically 70 to 150 tonnes onshore.
NACGF X130. National Coast Guards and Cutter Fleets: North Atlantic Coast Guard Forum, founded 2007, includes USCG, Canadian CCG, French Garde-Cotes, Icelandic LHG and Norwegian Kystvakt.
NACOS X19. Engine Room Watchkeeping and UMS Operations: Wartsila navigation, automation, and control system suite.
NACOS Platinum X25. Maritime Cybersecurity, OT and IT: Wartsila SAM Electronics integrated bridge and automation platform.
Nacra 17 F4. Recreational Boating, Yachting and Sport: Foiling mixed catamaran, Olympic class from 2016.
NACS X83. ISO Container Manufacturing and Leasing: National Container Services, a US container depot and repair operator.
Nadezhda X128. Sail Training Ships and Tall Ship Associations: Russian three masted full rigged ship built 1991 at Gdansk, 108.6 m length, sixth and last B95 class sister, operated by Far Eastern State Technical Fisheries University Vladivostok.
NAFO D4. Fisheries, aquaculture, blue economy and marine resources: Northwest Atlantic Fisheries Organization.
NAFO Conservation and Enforcement Measures (CEM) X87. Fishing Vessels and Fisheries Management: Annual compilation of NAFO regulatory measures.
NAFO Division X87. Fishing Vessels and Fisheries Management: Statistical and management subdivision of the NAFO Convention area, designated by alphanumeric codes such as 3M and 3L.
NAFTA X6. Container, Intermodal and Trade Codes: Former North American Free Trade Agreement, succeeded by USMCA.
Naftiliaki X29. Ship Sale and Purchase, Management Contracts and Valuation: Greek maritime publication and market commentary source.
Naftomar Shipping X134. LNG and LPG Carrier Operators and Containment Systems: Greek LPG and chemical tanker operator, fleet of MGC and Handysize LPG carriers.
Nagasaki Shipyard X113. Drydock and Ship Repair Yards: Mitsubishi Heavy Industries shipyard at Nagasaki, Japan, historically active in cruise and naval shipbuilding.
Nagasaki Spirit (1992) X99. Marine Salvage Awards and SCOPIC: VLCC involved in a collision with the Ocean Blessing in the Malacca Strait whose arbitration prompted Article 14 reform and led to SCOPIC.
Nagasaki Spirit (The) X157. Marine Loss Adjusters, GA Practice, and Casualty Firms: 1997 House of Lords decision (Semco Salvage v Lancer Navigation) holding that special compensation under Salvage Convention Art 14 does not include a profit element.
Nagasaki Spirit, The [1997] AC 455 X143. Landmark Maritime Law Cases and Doctrines: House of Lords held that salvors' special compensation under article 14 Salvage Convention 1989 did not include a profit element, prompting SCOPIC.
Nagoya X92. Marine Steel Suppliers and Shipbuilding Plate: Nippon Steel Corporation integrated works in Aichi prefecture, Japan.
Naiad Dynamics X125. Superyacht Industry, Builders and Brokers: Manufacturer of zero speed stabilizers commonly fitted to superyachts.
Naijasa-class X77. Naval Mine Warfare and Mine Countermeasures: A Republic of Korea Navy minesweeper class.
NaiKun tidal site X57. Ocean Energy Beyond Wind: Reference name used in early Canadian Pacific coast tidal stream resource studies.
Nairobi Convention 2007 X4. Marine Insurance, P&I and Claims: Nairobi International Convention on the Removal of Wrecks, supported by P&I blue cards.
Nairobi International Convention on the Removal of Wrecks X141. Marine Salvage Industry and Wreck Removal Contractors: Adopted 2007, in force 14 April 2015, requires compulsory wreck removal insurance for ships above 300 GT.
Nairobi International Convention on the Removal of Wrecks 2007 X99. Marine Salvage Awards and SCOPIC: Convention in force 14 April 2015 establishing rights and duties of states and shipowners regarding wreck removal.
Nairobi WRC A4. Other IMO and ILO conventions and codes: Nairobi International Convention on the Removal of Wrecks, 2007.
Nairobi Wreck Removal Convention X158. IMO Conventions, Protocols, Codes, and Resolutions: Nairobi International Convention on the Removal of Wrecks, adopted 18 May 2007 and entered into force 14 April 2015.
Nairobi Wreck Removal Convention 2007 E1. Maritime security, geopolitics and risk: Liability and compulsory insurance for wreck removal.
Nakashima Propeller X38. Propellers, Stern Gear and Shaft Lines: Japanese propeller foundry (Okayama) producing FPP and CPP blades for merchant and naval vessels.
Naked charter C1. Commercial shipping, chartering, economics and finance: Bareboat charter.
Nakhoda's logbook B3. Nautical Science: Historic master's log.
Nakhodka X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A Russian Far East port near Kozmino, frequently in price-cap monitoring datasets.
Nakilat X56. LNG/LPG Carriers and IGC Code: Qatar Gas Transport Company, owner of the Q-Flex and Q-Max LNG carriers serving Qatari LNG exports.
Naloxone X36. Shipboard Medical, Telemedicine and Seafarer Health: Opioid antagonist for overdose reversal; IM or IN administration.
NAMA (National Association of Marine Surveyors) X120. Marine Catering, Provisions and Ship Chandlers: US trade association of marine surveyors, occasionally involved in stores cargo claims.
NAMAR X114. Maritime Arbitration and Shipping Law Firms: Norwegian Maritime Authority's reference in disputes.
Named Account X17. Chartering, Shipbroking and Freight Trading: Specific charterer named in the recap, often a major oil company or trading house.
Named Perils X4. Marine Insurance, P&I and Claims: cover responding only to perils specifically listed, as in ICC (B) and (C).
Named Perils Cover X117. Marine Insurance Markets, Captives and Reinsurance: Coverage limited to listed perils, as in ICC (B) and (C).
NAMEPA Annual Conference and Awards X119. Maritime Conferences, Trade Shows and Awards: North American Marine Environment Protection Association event held annually in New York since 2009.
Naming ceremony X58. Shipbuilding Yards and Construction: Formal ceremony at which a vessel receives its name and is christened.
NAMMA X102. Seafarer Welfare and Maritime Charities: North American Maritime Ministry Association, the regional ecumenical network for port chaplaincy in the US and Canada.
NAMMCO X87. Fishing Vessels and Fisheries Management: North Atlantic Marine Mammal Commission, established by the 1992 Agreement, distinct from RFMOs but interfacing on bycatch.
NAMS X155. Marine Surveying Practice and Cargo Inspection: The National Association of Marine Surveyors in the United States, granting the Certified Marine Surveyor (CMS) credential after examination and peer review.
Namura Shipbuilding X58. Shipbuilding Yards and Construction: Japanese shipbuilder at Imari and Saiki, focused on tankers and bulk carriers.
Namura Shipbuilding Imari X113. Drydock and Ship Repair Yards: Japanese shipbuilder at Imari, Saga Prefecture, producing very large tankers, bulkers, and container ships.
Nan Tian Long X124. Dredging Industry and Reclamation Contractors: CCCC CSD with 23,000 kW total power, the largest in Chinese fleet alongside Tian Kun Hao.
Nanchang X106. Naval Surface Combatants: People's Liberation Army Navy Type 055 Renhai-class destroyer, hull 101 and lead ship of the class.
Nanhai One F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Song dynasty merchant wreck raised intact in 2007.
Naniwa Pump X63. Marine Auxiliary Machinery and Pumps: Japanese manufacturer of marine centrifugal pumps for cooling, transfer, and cargo service.
Naniwa Self-Priming Pump X63. Marine Auxiliary Machinery and Pumps: Self-priming centrifugal pump series from Naniwa for bilge and ballast duty.
Nanjing X124. Dredging Industry and Reclamation Contractors: CCCC inland dredging projects on the Yangtze.
Nanjing University Maritime Logistics Center X121. Maritime Education, Academies and Universities: Chinese university research outreach.
Nansen X124. Dredging Industry and Reclamation Contractors: Vox Nansen, Van Oord TSHD of 19,500 m3.
Nansen Bottle D1. Physical and chemical oceanography and marine meteorology: Classical water sampler used before electronic CTDs.
Nansen class X11. Naval Vessels, Warship Systems and Naval Architecture: Royal Norwegian Navy frigate with Aegis and SPY-1F.
Nansha Port X138. Global Container Terminal Operators and Port Equipment: Guangzhou Port's deep-water facility, China's third largest container port with 19.2 million TEU handled in 2023.
Nantong COSCO KHI Ship Engineering X58. Shipbuilding Yards and Construction: NACKS, Sino-Japanese joint venture yard at Nantong between COSCO and KHI.
Nantong Plant X83. ISO Container Manufacturing and Leasing: CIMC container manufacturing site in Nantong, Jiangsu Province.
Nantong Shipping College X121. Maritime Education, Academies and Universities: Chinese shipping technical college on the lower Yangtze.
Nantong Yard X113. Drydock and Ship Repair Yards: Reference shorthand for the COSCO Shipping Heavy Industry repair facility at Nantong, Jiangsu.
Nantucket Sound X123. Offshore Wind Installation Vessels and Operators: Massachusetts waters where Cape Wind was proposed and cancelled, currently no commercial offshore wind activity.
Nanyang Polytechnic School of Engineering X121. Maritime Education, Academies and Universities: See TMS School of Maritime Studies.
Nanyang Technological University Maritime Studies X160. Maritime Academies, Universities, and STCW Certification: NTU Singapore maritime studies offerings under its School of Civil and Environmental Engineering and the Maritime Energy and Sustainable Development Centre.
Nao Trinidad X128. Sail Training Ships and Tall Ship Associations: Spanish 16th century carrack replica built 2018 at Punta Umbria, 29 m length, operated by Fundacion Nao Victoria.
Nao Victoria X128. Sail Training Ships and Tall Ship Associations: Spanish replica of Magellan's flagship built 1991 to 1992 at Punta Umbria, 26 m length, sail training and heritage tours under Fundacion Nao Victoria.
NaOH (caustic soda) X149. Marine Fuels, Bunkering, and Alternative Fuels: The alkaline reagent used to neutralize wash water in closed-loop scrubbers.
NaOH Storage X69. EGCS Scrubbers, SCR and Marine Air Emissions: Caustic soda storage tank associated with closed-loop scrubber operation.
NAPA X54. Naval Architecture Software and IACS Rules: Naval Architecture Package, Finnish naval architecture software suite originally developed in 1971.
NAPA Designer X54. Naval Architecture Software and IACS Rules: NAPA module for hull and structural geometry definition.
NAPA Fleet Intelligence X74. AIS Data, Vessel Tracking and Maritime Intelligence: Finnish performance monitoring service combining noon reports and AIS-derived voyage data.
NAPA Loading Computer X54. Naval Architecture Software and IACS Rules: Onboard NAPA module for stability and strength monitoring approved by class societies.
NAPA Steel X54. Naval Architecture Software and IACS Rules: NAPA module for steel structural design supporting CSR-BC+OT rule calculations.
NAPA Trim X78. Voyage Optimization and Vessel Performance Software: A trim optimization application from NAPA that recommends best trim based on hydrodynamic models and operational data.
NAPA Voyage Optimization X78. Voyage Optimization and Vessel Performance Software: A weather routing and speed profile optimization product from NAPA used to plan and execute fuel efficient voyages.
NAPA Voyage Reporting X101. Vessel Brokerage Software and Chartering Platforms: Voyage performance and reporting module from NAPA, the Helsinki-based naval architecture and operations software firm.
Naphtha X1. Cargo Science, Commodities and Cargo Care: Light distillate, clean product.
Naphtha Solvent X75. IMDG Code, Classes, Packing and Segregation: UN 1256 or UN 2553 depending on composition, Class 3 flammable liquid.
Naphthalene X47. Marine Fuel Quality and ISO 8217: Two-ring aromatic compound contributing to combustion soot in residual fuels.
Naphthalene Crude X75. IMDG Code, Classes, Packing and Segregation: UN 1334, Class 4.1 flammable solid.
Naphthalene Molten X75. IMDG Code, Classes, Packing and Segregation: UN 2304, Class 4.1 flammable solid carried molten, may invoke elevated temperature mark depending on temperature.
Naphthalene Residue X118. Ship Recycling Yards, Beaches and Regulation: Tar-based residues in fuel oil tanks, hazardous in IHM Part II handling.
Naphthenic acid X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Carboxylic acid present in some crudes, contributing to TAN and corrosivity.
Naphthenic base oil X61. Marine Lubricants and Cylinder Oils: Mineral base stock high in naphthenes, valued for low pour point in refrigeration and selected marine applications.
Napier diagram X16. Nautical Science, Navigation and COLREGs: Graphical plot of compass deviation against heading.
Napier, Robert X39. Pre-1900 Maritime History: Glasgow marine engineer who supplied engines to Cunard's first paddle steamers in 1840.
Naples X64. Cruise Industry Operators, Brands and Ships: Italian cruise port serving the Bay of Naples and the Amalfi Coast.
Naples Cruise Terminal X164. Cruise Industry, Brands, Ship Classes, and Terminals: The Stazione Marittima at Molo Angioino in Naples, operated by Terminal Napoli.
Napoleonic Wars at Sea F1. Maritime History: Royal Navy campaigns 1803 to 1815 including Trafalgar.
NAPOMAR X72. Bunkering Hubs and Bunker Suppliers: Mexican bunker supplier active at Manzanillo, Lazaro Cardenas, and Veracruz.
Naproxen X36. Shipboard Medical, Telemedicine and Seafarer Health: NSAID analgesic where stocked as alternative to ibuprofen.
Narcosis X82. Saturation Diving and Offshore Diving Operations: Nitrogen narcosis, the anesthetic effect of nitrogen at elevated partial pressure.
Narrow channel rule X15. Ports, Terminals and Stevedoring: COLREGS rule 9 relevant to fairway navigation.
Narwhal X10. Marine Biology, Fisheries and Oceanography: *Monodon monoceros*, Arctic odontocete with a long spiraled tusk.
NAS (Nautical Survey) E4. Cruise, offshore energy and auxiliary/specialised fleets: Hydrographic survey vessel terminology.
NASA Worldview D5. Coastal processes, sea-level, cryosphere and ocean observation science: NASA browsing tool for satellite imagery.
NASDAQ Commodities X161. Shipbroking, Freight Derivatives, and Baltic Indices: Oslo-based derivatives exchange that listed freight contracts until exiting the freight derivatives business in 2018.
NASDAQ Shipping Listings X49. Ship Finance, Leasing and Maritime Capital Markets: Group of US listed shipping companies on NASDAQ, predominantly Greek controlled.
Nashville X103. US Inland Waterway Towing and Barge: The Tennessee city on the Cumberland River and headquarters of Ingram Marine Group.
Nashville District X103. US Inland Waterway Towing and Barge: The US Army Corps of Engineers district responsible for the Cumberland and a portion of the Tennessee River.
Nasopharyngeal airway X36. Shipboard Medical, Telemedicine and Seafarer Health: Soft airway adjunct in shipboard airway kit.
Nassau X35. Yacht and Superyacht Industry: Bahamian capital and gateway to Exumas cruising.
NASSCO Norfolk X113. Drydock and Ship Repair Yards: General Dynamics NASSCO ship repair facility in Norfolk, Virginia, supporting US Navy and commercial customers.
NASSCO San Diego X113. Drydock and Ship Repair Yards: General Dynamics NASSCO shipyard in San Diego, California, building commercial vessels and repairing US Navy ships.
NASTRAN X54. Naval Architecture Software and IACS Rules: NASA Structural Analysis program, ancestor of MSC Nastran and NX Nastran.
Natchez X103. US Inland Waterway Towing and Barge: A Mississippi river city on the Lower Mississippi.
National Action Plan X28. Ship Recycling and End-of-Life: State plan to implement HKC obligations within a jurisdiction.
National Action Plan for Ship Recycling X50. Ship Recycling, Demolition and Hong Kong Convention: The country-level implementation programs filed by HKC and EU SRR states.
National Association of Shipbrokers and Agents X86. Port Agency, Husbandry and Disbursement: National body affiliated to FONASBA in each member country.
National authority X32. Marine Pilotage and Pilot Operations: Statutory body responsible for pilotage administration within a nation.
National Authority for Recycling X28. Ship Recycling and End-of-Life: Designated competent authority for ship recycling under HKC Regulation 8.
National Counter-Piracy Centre E1. Maritime security, geopolitics and risk: State-level coordination body (e.g., NCAGS).
National Court Enforcement X114. Maritime Arbitration and Shipping Law Firms: Recognition and enforcement of arbitral awards by national courts under the New York Convention.
National Court intervention X152. Maritime Arbitration and Dispute Resolution: Limited assistance role under section 44 English Arbitration Act 1996 including witness summonses, preservation of evidence, and interim relief.
National Cyber Security Centre Maritime Guidance X48. Maritime Cybersecurity: Country specific cyber guidance such as the UK Department for Transport's Code of Practice for Cyber Security for Ships.
National Electrical Manufacturers Association X67. Marine Electrical Systems and Shore Power: NEMA standards used alongside IEC standards on US-flag and US Navy shipboard electrical equipment.
National Ensign F5. The Reference Layer: Glossary, Units, Signals and Information Sources: National flag flown by a ship at sea.
National Geographic Endeavour II X97. Polar Expedition Cruise and IAATO Operations: Lindblad Expeditions ship with 96 PAX, primarily used in the Galapagos.
National Geographic Endurance X97. Polar Expedition Cruise and IAATO Operations: Lindblad Expeditions expedition ship delivered in 2020 with 138 PAX and Polar Code 1A notation.
National Geographic Explorer X97. Polar Expedition Cruise and IAATO Operations: Lindblad Expeditions polar expedition ship delivered in 2008 with 148 PAX.
National Geographic Orion X97. Polar Expedition Cruise and IAATO Operations: Lindblad Expeditions expedition ship delivered in 2003 with 102 PAX.
National Geographic Quest X97. Polar Expedition Cruise and IAATO Operations: US-flagged Lindblad Expeditions coastal expedition ship.
National Geographic Resolution X97. Polar Expedition Cruise and IAATO Operations: Lindblad Expeditions ship delivered in 2021 with 126 PAX, sister to National Geographic Endurance.
National Geographic Sea Bird X97. Polar Expedition Cruise and IAATO Operations: US-flagged Lindblad Expeditions coastal expedition ship used in Alaska and the Pacific Northwest.
National Geographic Sea Lion X97. Polar Expedition Cruise and IAATO Operations: US-flagged Lindblad Expeditions coastal expedition ship used in Alaska and the Pacific Northwest.
National Geographic Venture X97. Polar Expedition Cruise and IAATO Operations: US-flagged Lindblad Expeditions coastal expedition ship.
National Green Tribunal NGT X28. Ship Recycling and End-of-Life: Indian environmental tribunal that has heard several Alang ship recycling cases.
National Green Tribunal Orders, India X50. Ship Recycling, Demolition and Hong Kong Convention: Tribunal decisions affecting Alang yard operations on environmental grounds.
National Grid X42. Offshore Wind Installation and Cable Lay: UK transmission system operator interfacing with offshore wind export cable connections.
National Grid ESO X57. Ocean Energy Beyond Wind: UK electricity system operator that handles grid integration of tidal, wave, and offshore hydrogen interconnections.
National Grid Ventures X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: UK subsidiary of National Grid plc developing and operating subsea HVDC interconnectors including NSL, Viking Link, and IFA.
National Hyperbaric Centre X59. Offshore Wind O&M, CTVs and SOVs: UK facility used for some specialist subsea intervention training relevant to cable repair campaigns.
National Ice Center X52. Polar Code, Arctic and Antarctic Shipping: US National Ice Center in Suitland, Maryland, a joint NOAA, US Navy, and US Coast Guard center producing ice analyses worldwide.
National Ice Center (NIC) X27. Polar Code, Ice Navigation and Polar Operations: US joint USN-NOAA-USCG ice service producing global ice analysis charts.
National Industrial Transportation League (NITL) X104. Project Cargo Forwarders and Heavy Transport: US shippers' association engaged in transport policy.
National Inspector X146. Port State Control Regimes, MoUs, and Inspection Systems: The shorthand for a PSC officer employed by a national maritime administration.
National Instruments PXI X96. Hull Integrity Monitoring and Strain Gauges: Modular instrumentation platform supporting strain and vibration measurement cards.
National Iranian Oil Company (NIOC) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A state oil company designated under U.S. sanctions, whose seaborne exports are tracked in NITC and proxy-fleet schemes.
National Iranian Oil Refining and Distribution Company (NIORDC) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: An NIOC subsidiary handling refined products, subject to U.S. designation.
National Iranian Tanker Company (NITC) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: The Iranian tanker operator, repeatedly designated and the subject of complex front-company restructurings to evade sanctions.
National Marine Fisheries Service (NMFS / NOAA Fisheries) X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: US federal agency under NOAA administering the Magnuson-Stevens Act.
National Marine Manufacturers Association X19. Engine Room Watchkeeping and UMS Operations: Industry body referenced for some auxiliary equipment standards.
National Marine Manufacturers Sample X115. Marine Bunker and Cargo Surveying: Term occasionally used in U.S. inland markets for retained reference samples retained by suppliers.
National Maritime Center (NMC) X36. Shipboard Medical, Telemedicine and Seafarer Health: US Coast Guard centre issuing medical certificates Form CG-719K.
National Maritime College of Ireland X55. Marine Simulators, Training and Maritime Academies: Cork-based college within Munster Technological University offering nautical and marine engineering degrees.
National Maritime Day (India) X119. Maritime Conferences, Trade Shows and Awards: Annual April 5 observance honoring the maiden voyage of SS Loyalty in 1919.
National Maritime Day (United States) X119. Maritime Conferences, Trade Shows and Awards: Annual May 22 observance by US Congress since 1933, honoring the SS Savannah voyage.
National Maritime Day (US) X102. Seafarer Welfare and Maritime Charities: Observed 22 May, recognized by the AMMV and US maritime industry organizations.
National Maritime Historical Society F2. Maritime Culture, Heritage, Archaeology, Art and Museums: US-based organization publishing Sea History magazine.
National Maritime Inquiry Committee (Brazil) X163. Marine Accident Investigation Agencies and Landmark Inquiries: Brazilian internal naval inquiry body operating under the DPC framework.
National Maritime Museum, Greenwich F2. Maritime Culture, Heritage, Archaeology, Art and Museums: World's largest maritime museum, founded 1937.
National Maritime Polytechnic Philippines X121. Maritime Education, Academies and Universities: NMP in Tacloban, founded 1978, the official Philippine maritime training research and assessment centre under MARINA.
National Maritime Research Institute (NMRI Japan) X38. Propellers, Stern Gear and Shaft Lines: Japanese research institute publishing propeller and ESD studies.
National Maritime Services X141. Marine Salvage Industry and Wreck Removal Contractors: USCG-recognised salvor and OPA-90 SMFF provider in US Southeast.
National Maritime Union (NMU) X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Former US merchant-marine union, absorbed by SIU North America in 2001.
National MASS Authority X109. Maritime Autonomous Surface Ships and MASS Code: The national maritime administration that grants and oversees MASS trial permissions in its waters.
National Museum of the United States Navy F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Washington Navy Yard institution.
National NAVTEX X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: NAVTEX service in national languages on 490 kHz.
National Oceanic and Atmospheric Administration (NOAA) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: US agency overseeing nautical charting and ocean management activities that interface with submarine cables and pipelines.
National Pilotage Service X86. Port Agency, Husbandry and Disbursement: National service supplying pilots to ports, booked through the agent.
National Plan of Action (NPOA-IUU) X87. Fishing Vessels and Fisheries Management: National document implementing the FAO IPOA-IUU 2001.
National Plan of Action (NPOA) D4. Fisheries, aquaculture, blue economy and marine resources: Plan to address issues such as seabird bycatch or IUU.
National Polytechnic University of Odesa X55. Marine Simulators, Training and Maritime Academies: Ukrainian university whose Odesa National Maritime Academy trained deck and engine officers.
National port master plan C4. Ports, terminals and coastal/marine civil engineering: Government port system plan.
National register X7. Flag State, Port State Control and Detention Vocabulary: First or traditional ship register of a State, often with nationality and crew requirements.
National Response Center (NRC) X126. Marine Oil Spill Response and OPRC Regimes: US 24/7 spill reporting line operated by USCG at 1-800-424-8802.
National Response Corporation (NRC) X126. Marine Oil Spill Response and OPRC Regimes: US OPA 90 OSRO owned by NRC Group (formerly SEACOR) with bases nationwide, distinct from the National Response Center.
National Response Team (NRT) X126. Marine Oil Spill Response and OPRC Regimes: US 16-agency federal team chaired by EPA and USCG under the NCP.
National Risk Management Center (NRMC) X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: A US CISA capability that includes maritime transportation systems analysis.
National Sailing Hall of Fame F4. Recreational Boating, Yachting and Sport: US sailing recognition body.
National Sanitation Foundation (NSF) X120. Marine Catering, Provisions and Ship Chandlers: US public health body whose NSF H1 lubricants are mandated for food contact in galleys.
National SAR Plan X80. Maritime Search and Rescue Coordination: National document defining domestic SAR organization and procedures.
National Security Cutter X130. National Coast Guards and Cutter Fleets: USCG 4,500-ton flagship class, Legend-class, 418 feet, 28-knot speed, MH-60T capable hangar.
National Shipbuilding Research Program X54. Naval Architecture Software and IACS Rules: US industry-government collaboration influencing CAD/CAM standards.
National Snow and Ice Data Center (NSIDC) D5. Coastal processes, sea-level, cryosphere and ocean observation science: US data center for cryospheric data.
National Stock Exchange of India (NSE) X161. Shipbroking, Freight Derivatives, and Baltic Indices: Indian exchange not currently a major freight derivatives listing venue, distinct from NCDEX.
National Strike Force X130. National Coast Guards and Cutter Fleets: USCG environmental response unit with strike teams Atlantic (Fort Dix), Gulf (Mobile) and Pacific (Novato).
National Sun Yat-sen University Department of Marine Engineering X121. Maritime Education, Academies and Universities: Kaohsiung, Taiwan, marine engineering school.
National Taiwan Ocean University X121. Maritime Education, Academies and Universities: NTOU in Keelung, founded 1953, Taiwan's premier maritime university with the Department of Merchant Marine and Department of Marine Engineering.
National Tidal Datum Epoch D2. Hydrography, tides, waves, bathymetry and marine geology: 19-year period used to compute tidal datums.
National Transmission System X42. Offshore Wind Installation and Cable Lay: UK onshore high voltage network into which offshore wind power is exported.
National Union of Seafarers of India (NUSI) X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Indian ratings union and ITF affiliate.
National Union of Seamen (NUS) X102. Seafarer Welfare and Maritime Charities: Historic UK seafarers' union, founded 1887, which merged into the RMT in 1990.
National University of Singapore Centre for Maritime Studies X121. Maritime Education, Academies and Universities: See Center for Maritime Studies NUS.
National Variation X1. Cargo Science, Commodities and Cargo Care: National additions to IMDG (e.g., US 49 CFR).
National Vessel Documentation Center X98. Ship Registries and Flag States: NVDC, US Coast Guard office in Falling Waters, West Virginia, responsible for documentation of US-flag commercial vessels.
National Vetting X40. Tanker Vetting, SIRE and VIQ: Charterer screening conducted by state-owned oil companies such as Saudi Aramco, Petrobras, ADNOC, KPC, and Sonangol.
National Vetting Programme E1. Maritime security, geopolitics and risk: Government-led oil-major vetting backstop.
National Waterway 1 (NW-1) X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The Ganges-Bhagirathi-Hooghly system from Haldia to Varanasi, 1,620 km, India's flagship inland waterway with terminals at Varanasi, Sahibganj, and Haldia.
National Waterway 2 (NW-2) X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The Brahmaputra from Dhubri to Sadiya, 891 km.
National Waterway 3 (NW-3) X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The West Coast Canal in Kerala from Kollam to Kottapuram, 205 km, including the Champakara and Udyogamandal canals.
National Waterway 4 (NW-4) X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The Krishna-Godavari corridor in Andhra Pradesh and Telangana, 1,078 km.
National Waterways Act 2016 X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The Indian Parliament Act that declared 106 additional waterways (NW-4 through NW-111) bringing the total to 111 National Waterways.
National Yacht Club F4. Recreational Boating, Yachting and Sport: Various clubs of that name, including Ireland's at Dun Laoghaire.
Nationality of Ships A6. Public international law of the sea: Determined by flag state under UNCLOS Article 91.
Native Potential X100. Marine Cathodic Protection and Anodes: The free-corrosion potential of a structure prior to application of any cathodic protection current.
Native species X18. Ballast Water, Biofouling and Antifouling: Species occurring naturally in a defined biogeographic region.
NATO Mine Countermeasures Group X77. Naval Mine Warfare and Mine Countermeasures: A standing NATO maritime force, designated SNMCMG1 and SNMCMG2, dedicated to multinational MCM operations and exercises.
NATO Operation Ocean Shield X22. Piracy, Maritime Security and Armed Protection: Alliance counter piracy operation in the Horn of Africa from 2009, terminated December 2016.
NATO STANAG E2. Naval, defence and maritime law enforcement: Standardization agreement for interoperability.
NATO Submarine Rescue System (NSRS) X91. Submarines and Submarine Cable Systems: Trinational rescue system serving France, Norway, and the United Kingdom.
Natura 2000 D3. Marine environmental science, pollution and conservation: EU network of protected areas under the Birds and Habitats Directives.
Natural Boil-Off X20. LNG Operations and Custody Transfer: BOG produced by heat ingress alone, used as fuel on DFDE/MEGI vessels.
Natural Fibre Rope X9. Cargo Securing, Lashing and Stability Vocabulary: Rope of manilla, sisal or hemp; MSL = 0.33 x BL.
Natural gas X56. LNG/LPG Carriers and IGC Code: Hydrocarbon gas mixture, primarily methane, that is liquefied for transport as LNG.
Natural Gas Liquids (NGL) X1. Cargo Science, Commodities and Cargo Care: Mix of light hydrocarbons.
Natural Gas Slip D6. Decarbonization, emissions and alternative fuels: Methane emissions from gas-fueled engines.
Natural justice X152. Maritime Arbitration and Dispute Resolution: Common law principle of fair hearing reflected in section 33 English Arbitration Act 1996 and protected by Article V(1)(b) of the New York Convention.
Natural Resource Damage Assessment (NRDA) D3. Marine environmental science, pollution and conservation: US process for quantifying damages from pollution incidents.
NaturaLINE X26. Reefer Containers and Cold Chain Logistics: Carrier Transicold reefer unit using R744 (CO2) natural refrigerant.
Naturalist X97. Polar Expedition Cruise and IAATO Operations: Subject-matter expedition staff member delivering interpretation on wildlife, ecology, and geology.