Glossary

Maritime glossary, terms beginning with L (page 7)

All maritime glossary terms that begin with the letter L, drawn from every subject section. 1899 entries.

Showing 250 of 1899 terms (page 7 of 8).

Loll X3. Ship Handling, Seamanship and Deck Vocabulary: Slow steady inclination when stability has been lost.
LOLO X6. Container, Intermodal and Trade Codes: Same as LO/LO.
LOLO (Lift-On Lift-Off) X46. Container Terminal Operations: A vessel or operation mode in which cargo is loaded and discharged vertically by crane, as distinct from RoRo.
LoLo Heavy Lift X104. Project Cargo Forwarders and Heavy Transport: Lift on lift off heavy cargo operation using ship's gear or shore crane.
Lome X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A Togolese port on the Gulf of Guinea cited as an STS and bunkering point in Iran and Russia sanctions-evasion reporting.
Lomonosov Ridge X133. Polar Research Vessels and Polar Code Regimes: Submarine ridge bisecting Arctic Ocean, subject of overlapping CLCS submissions.
Lonavla Maritime Academy X55. Marine Simulators, Training and Maritime Academies: Term used informally for the Samundra Institute of Maritime Studies in Lonavla, Maharashtra.
Lond P&I X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets: London Steam-Ship Owners' Mutual Insurance Association, founded 1866, headquartered in London; International Group member.
London X106. Naval Surface Combatants: Royal Navy Type 26 City-class frigate.
London Arbitration X143. Landmark Maritime Law Cases and Doctrines: Dominant international forum for shipping disputes.
London Array X105. Offshore Wind Farm Installation and Vessels: 630 MW UK offshore wind farm in the Thames Estuary commissioned in 2013 by a consortium including E.ON, RWE, and Masdar.
London as seat X152. Maritime Arbitration and Dispute Resolution: Most common seat for maritime arbitration globally, supported by the English Arbitration Act 1996 and the Commercial Court.
London Convention D3. Marine environmental science, pollution and conservation: 1972 convention on the prevention of marine pollution by dumping of wastes.
London Convention 1894 (Seamen) X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Early instrument addressing destitute seamen abroad, the lineage of modern repatriation rules.
London Convention 1972 X143. Landmark Maritime Law Cases and Doctrines: IMO convention on prevention of marine pollution by dumping, with 1996 Protocol entering into force 24 March 2006.
London Convention Centres X102. Seafarer Welfare and Maritime Charities: ICMA and ITF conferences periodically held in London to coordinate welfare and labor strategy.
London Gateway X94. Port Machinery and Quay Equipment Makers: DP World deepwater container terminal on the Thames using Konecranes STS and automated stacking cranes.
London International Insurance and Reinsurance Market Association X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets: Now the International Underwriting Association.
London Loan Market X49. Ship Finance, Leasing and Maritime Capital Markets: Syndicated shipping loan market centered on London law facility agreements.
London Maritime Arbitrators Association C1. Commercial shipping, chartering, economics and finance: LMAA, specialised maritime arbitration body.
London Maritime Cluster F3. Seafaring Life, Education, Professions and Institutions: World-leading professional services hub.
London Market X117. Marine Insurance Markets, Captives and Reinsurance: The combination of Lloyd's and IUA company markets in the City of London, the leading global specialty insurance hub.
London Missionary Society Ship X39. Pre-1900 Maritime History: The vessel Duff sailed from London in 1796 carrying the first Protestant missionaries to the South Pacific.
London Museum of Docklands F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Branch of the Museum of London.
London Offshore Consultants X43. Marine Surveying and Warranty Surveying: See LOC Group, founded in 1979, providing warranty survey and engineering services across offshore oil, gas, and wind sectors.
London P&I X108. Marine Insurance and P&I Clubs: The London Steam-Ship Owners' Mutual Insurance Association, founded 1869, party to merger discussions with West of England in 2024 to form WestLondon.
London P&I Club X53. Marine Insurance, P&I and Hull Clauses: The London Steam-Ship Owners' Mutual Insurance Association Limited, an International Group P&I club founded in 1866.
London Protocol D3. Marine environmental science, pollution and conservation: 1996 protocol updating the London Convention with a reverse-list approach.
London Salvage Convention X99. Marine Salvage Awards and SCOPIC: Common name for the International Convention on Salvage 1989.
London Salvage Convention 1989 X60. Marine Salvage and Wreck Removal: Common name for the IMO International Convention on Salvage.
London Shipbroking Cluster X71. Shipbrokers and Brokerage Firms: Concentration of brokers in the City of London and St Katharine Docks area.
London Shipping Law Centre F3. Seafaring Life, Education, Professions and Institutions: London-based academic-professional body.
London Shipping Week Reception at IMO X119. Maritime Conferences, Trade Shows and Awards: Industry reception at IMO HQ during LISW.
Long Beach X64. Cruise Industry Operators, Brands and Ships: California cruise homeport hosting the permanently moored Queen Mary and Carnival's Carnival Firenze and Carnival Panorama.
Long Beach BCT X138. Global Container Terminal Operators and Port Equipment: Pier T and Pier J leased to Long Beach Container Terminal, operator owned by Macquarie since 2019.
Long Beach Bunker Service X72. Bunkering Hubs and Bunker Suppliers: Bunker supply at the Port of Long Beach by Vitol, Chemoil, and ExxonMobil through barge delivery.
Long Beach Carnival Terminal X164. Cruise Industry, Brands, Ship Classes, and Terminals: The Carnival Cruise Line homeport at the Queen Mary in Long Beach, California, operating from the iconic geodesic dome.
Long Beach Pilots X32. Marine Pilotage and Pilot Operations: California state pilots serving Port of Long Beach.
Long Beach Race Week F4. Recreational Boating, Yachting and Sport: California regional regatta.
Long Island X42. Offshore Wind Installation and Cable Lay: US Atlantic location adjacent to Empire Wind and Sunrise Wind projects.
Long John Silver F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Fictional pirate from Treasure Island by Robert Louis Stevenson.
Long lance torpedo X11. Naval Vessels, Warship Systems and Naval Architecture: IJN Type 93 oxygen-fueled heavyweight torpedo.
Long Life Milk X120. Marine Catering, Provisions and Ship Chandlers: IMPA 551003 UHT milk, 1 L Tetra Pak, ambient stable for 6 months.
Long oil alkyd X45. Marine Paints, Coatings and Antifouling: Slow-drying alkyd with high oil content used for brushable maintenance paints.
Long Run Hot Work Permit X50. Ship Recycling, Demolition and Hong Kong Convention: A multi-shift hot work authorization, common during major block separation phases.
Long Sea HSC X132. High-Speed Craft, Hydrofoils and Ferry Operators: HSC Code term for craft operating more than 4 hours from a place of refuge for passengers.
Long Service Award (MNWB) X102. Seafarer Welfare and Maritime Charities: Recognition scheme run by the UK Merchant Navy Welfare Board for chaplains and welfare workers.
Long splice X3. Ship Handling, Seamanship and Deck Vocabulary: Splice that joins two ropes without significant increase in diameter.
Long Stay Vessel Care X86. Port Agency, Husbandry and Disbursement: Husbandry support for vessels in extended stay or layup.
Long Stroke (L) X90. Marine Engine Specific Model Enumeration: MAN B&W two-stroke design family with conventional long stroke to bore ratios, intermediate between Super Long Stroke and Short Stroke types.
Long swell C4. Ports, terminals and coastal/marine civil engineering: Long period waves affecting moored ships.
Long Term Mooring System X167. Major Salvage Companies, Wreck Removals, and Equipment: Salvage rigged mooring used to hold a casualty in position during multi-month wreck removal projects.
Long term service agreement X59. Offshore Wind O&M, CTVs and SOVs: LTSA, multiyear contract under which the turbine OEM delivers scheduled and corrective maintenance to defined performance levels.
Long ton X6. Container, Intermodal and Trade Codes: 2,240 lb, occasional unit in older charter parties.
Long Tonne Heavy Cargo X104. Project Cargo Forwarders and Heavy Transport: 2,240 pound tonne occasionally used for heavy cargo statements alongside metric.
Long Towing Bridle X79. Tugs and Towage Industry: Bridle assembly used on long-distance ocean tows.
Long Xiang Ship Recycling X50. Ship Recycling, Demolition and Hong Kong Convention: A Chinese recycling facility name historically associated with the Jiangyin cluster.
Long-Line Current X100. Marine Cathodic Protection and Anodes: Stray or telluric current that flows along extended pipelines or hulls and influences CP requirements.
Long-period wave X175. Port Engineering, Dredging, Breakwaters, and Quays: Wave with period in the range of about 30 seconds to several minutes that can excite harbor resonance.
Long-Range Identification and Tracking (LRIT) A2. Maritime safety legislation: SOLAS and its codes: Required under SOLAS V/19-1.
Long-Tail Business X4. Marine Insurance, P&I and Claims: business where claims develop over many years, including marine liability.
Long-Term COA X17. Chartering, Shipbroking and Freight Trading: Multi-year contract of affreightment, common in iron ore, coal and LNG.
Long-Term Ecological Research (LTER) D5. Coastal processes, sea-level, cryosphere and ocean observation science: Programs maintaining decadal observations of ecosystems.
Long-Term Lease X83. ISO Container Manufacturing and Leasing: Lease of containers for a fixed period, often five to eight years, with defined per diem.
Long-Venturi Nozzle X88. Marine Surface Preparation and Coatings Application: Blast nozzle geometry with extended converging-diverging bore that accelerates abrasive to higher exit velocity than straight-bore designs of equivalent throat diameter.
Longboat X124. Dredging Industry and Reclamation Contractors: GLDD scow.
Longitude F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Angular distance east or west of the prime meridian.
Longitude Act 1714 X39. Pre-1900 Maritime History: British statute offering a prize of up to £20,000 for a practical method of determining longitude at sea.
Longitudinal X58. Shipbuilding Yards and Construction: Stiffener running fore and aft along shell, deck, or bulkhead plating.
Longitudinal Acceleration X9. Cargo Securing, Lashing and Stability Vocabulary: Fore-and-aft component; typically 0.2g at midships in CSS Annex 13 standard tables.
Longitudinal bulkhead block X58. Shipbuilding Yards and Construction: Section of longitudinal bulkhead with adjoining double bottom or hopper.
Longitudinal center of buoyancy (LCB) B1. Naval Architecture: Longitudinal centroid of underwater volume.
Longitudinal center of flotation (LCF) B1. Naval Architecture: Centroid of waterplane area.
Longitudinal center of gravity (LCG) B1. Naval Architecture: Longitudinal centroid of mass.
Longitudinal framing B1. Naval Architecture: Primary framing oriented along the length.
Longitudinal Lashing X9. Cargo Securing, Lashing and Stability Vocabulary: Lashing oriented along ship's centerline.
Longitudinal metacenter (ML) B1. Naval Architecture: Metacenter for trimming moments.
Longitudinal stability B1. Naval Architecture: Stability for trim, governed by GML.
Longitudinal Strength X8. IACS, Class Rules and Class Notations: hull-girder bending and shear capacity, governed by IACS UR-S11 and CSR-H Part 1 Chapter 5.
Longline D4. Fisheries, aquaculture, blue economy and marine resources: Fishing line with many baited hooks.
Longliner X87. Fishing Vessels and Fisheries Management: Vessel rigged with a line hauler and storage for the mainline and gangions, deployed in pelagic or demersal configuration.
Longship F1. Maritime History: Viking clinker-built oared sailing vessel of the eighth to eleventh centuries.
Longshore Current D5. Coastal processes, sea-level, cryosphere and ocean observation science: Wave-driven current parallel to shore in the surf zone.
Longshore Sediment Transport D5. Coastal processes, sea-level, cryosphere and ocean observation science: Sediment transport along the shore by waves and currents.
Longshore Worker F3. Seafaring Life, Education, Professions and Institutions: US term for dock workers.
Longshoreman X76. Stevedoring, Lashing and Cargo Securing: Dockworker engaged in loading and discharging cargo, the US term broadly equivalent to stevedore.
Longyearbyen X52. Polar Code, Arctic and Antarctic Shipping: Administrative center of Svalbard at 78 degrees 13 minutes North, the world's northernmost town with regular shipping calls.
Lonmar Global Risks X51. Maritime Arbitration, Law and BIMCO Clauses: A specialist broker active in marine reinsurance, occasionally referenced in subrogated claims.
Loodswezen X32. Marine Pilotage and Pilot Operations: Dutch pilots' organization providing pilotage in the Netherlands.
Look Angle X68. Maritime Satcom and Telecommunications: Combination of azimuth and elevation pointing a vessel antenna at the satellite.
Look-ahead sector (ECDIS) X16. Nautical Science, Navigation and COLREGs: ECDIS-defined sector ahead of own ship monitored against safety alarms.
Lookout X3. Ship Handling, Seamanship and Deck Vocabulary: Person stationed to watch for objects ahead.
Lookout absence X12. Maritime Casualties and Investigation: Watchkeeping deficiency under COLREGs Rule 5 cited in many collision reports.
Lookout Algorithm X109. Maritime Autonomous Surface Ships and MASS Code: A software implementation of the COLREGs Rule 5 lookout duty combining inputs from radar, AIS, cameras, and audio sensors.
Lookout Distance X80. Maritime Search and Rescue Coordination: Maximum range at which a survivor can be visually detected from an SRU.
Lookout Doubling X22. Piracy, Maritime Security and Armed Protection: BMP recommended posting of additional lookouts during HRA transit.
Loom X3. Ship Handling, Seamanship and Deck Vocabulary: Glow above the horizon from a light beyond visual range; handle of an oar.
Loop currents X15. Ports, Terminals and Stevedoring: tidal currents affecting berth operations in certain ports.
Loop Set (Tuna Purse Seine) X87. Fishing Vessels and Fisheries Management: Setting maneuver in which the seiner encircles a school in a closed loop before pursing.
Loop Sling X104. Project Cargo Forwarders and Heavy Transport: Endless soft sling used in basket or choker hitches on project lifts.
Loop test X122. Submarine Cable Laying, Repair Vessels and Operators: PFE test injecting current through a cable loop to verify continuity and insulation resistance before commissioning.
Loop Tow X103. US Inland Waterway Towing and Barge: A tow configured to make a circuit of multiple loading and discharge points.
LOOP Trunkline X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Louisiana Offshore Oil Port pipeline system bringing crude oil from offshore SPM buoys to onshore caverns.
Loose X3. Ship Handling, Seamanship and Deck Vocabulary: Cast off; not made fast.
Loose Cargo X9. Cargo Securing, Lashing and Stability Vocabulary: Cargo not packaged into a unit; secured by blocking or general lashings.
Loose Gear X104. Project Cargo Forwarders and Heavy Transport: Slings, shackles, and accessories used between hook and load on a project lift.
Loose hatch report X76. Stevedoring, Lashing and Cargo Securing: Operator notification of containers found unsecured in port or at sea.
Loperamide X36. Shipboard Medical, Telemedicine and Seafarer Health: Antidiarrheal in shipboard chest.
Lophelia pertusa X10. Marine Biology, Fisheries and Oceanography: Cold-water reef-forming coral, now classified as *Desmophyllum pertusum*.
Loran-C B3. Nautical Science: Legacy hyperbolic radionavigation system.
LoRaWAN X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: A low-power wide-area network protocol used in some port asset tracking, with its own security caveats.
Lorazepam X36. Shipboard Medical, Telemedicine and Seafarer Health: Benzodiazepine alternative to diazepam where authorized.
Lord High Admiral X39. Pre-1900 Maritime History: Senior English naval office held by various royal personages and statesmen from the fourteenth century.
Lord Jim F2. Maritime Culture, Heritage, Archaeology, Art and Museums: 1900 novel by Joseph Conrad.
Lord Justice Males X114. Maritime Arbitration and Shipping Law Firms: Court of Appeal Lord Justice with a shipping background, hearing arbitration appeals.
Lord Justice Popplewell X114. Maritime Arbitration and Shipping Law Firms: Court of Appeal judge with extensive Commercial Court shipping experience.
Lord Mansfield X51. Maritime Arbitration, Law and BIMCO Clauses: The eighteenth century Chief Justice whose decisions shaped much of modern English commercial and maritime law.
Lord Mersey X163. Marine Accident Investigation Agencies and Landmark Inquiries: John Charles Bigham, Viscount Mersey, the Wreck Commissioner for the United Kingdom who presided over the formal investigations into the loss of the Titanic (1912) and the Lusitania (1915).
Lord Nelson (SV) X128. Sail Training Ships and Tall Ship Associations: UK Jubilee Sailing Trust three masted barque built 1986 at Wivenhoe, 49 m length, world's first purpose built tall ship for mixed ability crews, retired and sold 2020.
Lorelay X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Allseas pipelay vessel of about 184 m length, with S-lay capability in water depths to roughly 2,200 m.
Lorentzen & Stemoco X71. Shipbrokers and Brokerage Firms: Norwegian shipbroker with a long history in dry, tanker, gas, and S&P.
Lorentzen Stemoco X161. Shipbroking, Freight Derivatives, and Baltic Indices: Oslo-based shipbroker active in dry, wet, S&P, newbuilding, and project finance advisory.
Lorient Naval Yard X113. Drydock and Ship Repair Yards: Former STX France naval shipbuilding facility at Lorient producing surface combatants for the French Navy and export customers.
Lorraine X106. Naval Surface Combatants: French Navy FREMM-DA air-defense variant frigate D657, commissioned 2024.
LOS X31. Helicopter Operations on Ships: Limited Obstacle Sector.
Los Angeles X84. Yacht Racing, Regattas and Sailing Governance: Start port of the Transpacific Yacht Race to Honolulu since 1906.
Los Angeles Pilots X32. Marine Pilotage and Pilot Operations: Port of Los Angeles Pilot Service operating under the Port of Los Angeles Harbor Department.
Los Angeles-class X62. Naval Warships and Combat Systems: US Navy nuclear-powered attack submarine class, the largest SSN class ever built.
LOSC X126. Marine Oil Spill Response and OPRC Regimes: UN Convention on the Law of the Sea, providing the umbrella for IMO instruments on pollution.
Loss Adjuster X108. Marine Insurance and P&I Clubs: An independent professional appointed to investigate, quantify, and apportion marine claims.
Loss Adjuster Survey Liaison X43. Marine Surveying and Warranty Surveying: The interaction between the appointed marine loss adjuster and field surveyors providing technical evidence supporting an insurance claim.
Loss control X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Procedures and instrumentation to minimize quantity disputes.
Loss Control Survey X115. Marine Bunker and Cargo Surveying: Inspection focused on identifying loss prevention measures and risk exposures during cargo and bunker operations.
Loss of Communications X80. Maritime Search and Rescue Coordination: Alert phase triggered by unexplained communication failure with a vessel.
Loss of containment X19. Engine Room Watchkeeping and UMS Operations: Release of fluid from a system, triggering bilge or gas alarm.
Loss of Containment (LOC) X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: A defined hazardous incident category whose history is reviewed during vetting risk scoring.
Loss of Containment Risk (Dark Fleet) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: The spill-and-incident exposure highlighted by AIS-dark STS at sea using aged, uninsured tonnage.
Loss of Hire X108. Marine Insurance and P&I Clubs: A separate cover indemnifying owners for daily loss of earnings while a vessel is off-hire due to an insured peril, with daily indemnities typically between 30,000 and 100,000 United States dollars…
Loss of Hire (LOH) X53. Marine Insurance, P&I and Hull Clauses: Insurance compensating the owner for loss of charter hire during periods the vessel is off-hire due to insured damage, subject to deductible days and indemnity period limits.
Loss of Hire Insurance X4. Marine Insurance, P&I and Claims: cover for daily indemnity following insured damage causing the vessel to be off-hire or out of service.
Loss of life threshold X163. Marine Accident Investigation Agencies and Landmark Inquiries: Criterion under the Casualty Investigation Code that triggers the very serious marine casualty classification when a death of a person occurs in connection with the operations of a ship.
Loss Of Link X109. Maritime Autonomous Surface Ships and MASS Code: A defined event in MASS operation when the ship to shore data link is unavailable, triggering pre-planned safe behavior.
Loss of Profits Insurance X53. Marine Insurance, P&I and Hull Clauses: Cover for consequential financial losses arising from interruption of operations, sometimes written alongside LOH.
Loss of Propulsion Casualty X60. Marine Salvage and Wreck Removal: Vessel disabled by engine room failure, requiring towage to a place of safety.
Loss Prevention Bulletin X108. Marine Insurance and P&I Clubs: A safety circular issued by P&I clubs sharing claims experience and operational guidance with members.
Loss Reserve X4. Marine Insurance, P&I and Claims: amount set aside to meet estimated outstanding claims.
Loss Settlement X4. Marine Insurance, P&I and Claims: agreement and payment of an insured loss.
Lost Container Recovery X60. Marine Salvage and Wreck Removal: Sweep operations to locate and retrieve containers fallen overboard, exemplified by MSC Zoe response.
Lost Gear Recovery X87. Fishing Vessels and Fisheries Management: Operation to retrieve abandoned, lost, or otherwise discarded fishing gear, addressed by the Global Ghost Gear Initiative.
Lothal, Indus Valley Dockyard F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Bronze Age maritime structure in Gujarat.
Lothar Knutsen X110. LNG Bunkering Infrastructure and Vessels: Knutsen OAS Shipping LNG bunker vessel serving the US Gulf, including Houston and Galveston.
LOTO C2. Ship operations, crewing and technical management: Lockout tagout discipline for machinery isolation.
LOTOTO X14. Offshore Oil and Gas Marine Operations: Lock out, tag out, try out; isolation safety practice.
Lotsenbruderschaft X32. Marine Pilotage and Pilot Operations: German pilots' brotherhood organizing pilots into recognized fraternities.
Lotus Principle A6. Public international law of the sea: PCIJ doctrine of state sovereignty over flagged ships (Lotus, 1927), now qualified by UNCLOS.
Lotus Shipping X50. Ship Recycling, Demolition and Hong Kong Convention: A Mumbai-headquartered cash buyer active in the end-of-life vessel market.
Louis S. St-Laurent X52. Polar Code, Arctic and Antarctic Shipping: See CCGS Louis S. St-Laurent.
Louisville X103. US Inland Waterway Towing and Barge: The Kentucky city on the Ohio River served by the McAlpine Locks and Dam.
Low Air Temperature X133. Polar Research Vessels and Polar Code Regimes: Polar Code defined Mean Lower Daily Low Air Temperature MDLT used to derive Polar Service Temperature.
Low and Slow X22. Piracy, Maritime Security and Armed Protection: Vessel profile of low freeboard and speed below 18 knots historically associated with successful pirate attacks.
Low BN cylinder oil X61. Marine Lubricants and Cylinder Oils: Cylinder lubricant with Base Number between 25 and 40 formulated for very low sulfur fuel operation.
Low Carbon Fuel Standard D6. Decarbonization, emissions and alternative fuels: Policy requiring fuel suppliers to reduce carbon intensity.
Low duty compressor X56. LNG/LPG Carriers and IGC Code: BOG compressor with relatively low discharge pressure used for forwarding gas to engines or vapor return to shore.
Low Earth Orbit (LEO) Constellation E3. Technology, digitalization and smart shipping: Multi-satellite broadband network category.
Low Light Camera X109. Maritime Autonomous Surface Ships and MASS Code: A camera with high sensitivity used to maintain visual situational awareness at night for MASS perception stacks.
Low LO pressure alarm X19. Engine Room Watchkeeping and UMS Operations: Critical alarm shutting down engine if pressure falls below safety set point.
Low load operation X27. Polar Code, Ice Navigation and Polar Operations: Engines must run reliably at low load during station-keeping in ice.
Low Noise Block X68. Maritime Satcom and Telecommunications: See LNB.
Low NOx Burner X63. Marine Auxiliary Machinery and Pumps: Burner designed to limit nitrogen oxide formation in flue gas.
Low Pressure Cylinder X63. Marine Auxiliary Machinery and Pumps: First-stage cylinder of a reciprocating air compressor.
Low pressure dual fuel X56. LNG/LPG Carriers and IGC Code: Engine category that injects gas at low pressure into the cylinder during the compression stroke, including the Wartsila X-DF series.
Low Pressure SCR X69. EGCS Scrubbers, SCR and Marine Air Emissions: SCR reactor located downstream of the turbocharger for two-stroke engines.
Low Profile Chassis X83. ISO Container Manufacturing and Leasing: Chassis with lowered deck height for over-height container loads.
Low Risk Ship X7. Flag State, Port State Control and Detention Vocabulary: LRS under Paris MoU NIR, eligible for inspection every 24 to 36 months.
Low Risk Ship (LRS) X66. Port State Control and Regional MOUs: Ship Risk Profile category under Paris MOU NIR with inspection interval of 24-36 months.
Low salinity challenge X18. Ballast Water, Biofouling and Antifouling: Operating condition that reduces efficacy of UV (due to turbidity) and chlorine BWMS (due to low chloride).
Low Smoke Zero Halogen (LSZH) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Cable sheath material standard used in some shore-end submarine cables for fire safety.
Low solvent X165. Marine Coatings, Antifouling, and Hull Husbandry: Marine coating formulation reducing volatile organic compounds, often expressed as grams per liter of VOC.
Low Specific Activity X75. IMDG Code, Classes, Packing and Segregation: LSA, classification of Class 7 material in subcategories LSA-I, LSA-II and LSA-III under IMDG 2.7.1.5.
Low Specific Activity (LSA) X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: LSA-I, LSA-II, LSA-III subcategories of Class 7 material with limited specific activity per gram.
Low Speed Diesel (LSD) X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Slow-speed crosshead engine driving the propeller directly.
Low Suction Cutoff X63. Marine Auxiliary Machinery and Pumps: Automatic protection stopping a pump on loss of suction pressure or level.
Low sulfur fuel oil X47. Marine Fuel Quality and ISO 8217: Residual fuel meeting a defined sulfur cap below the global 0.50 percent limit but above the 0.10 percent SECA limit.
Low Sulfur Fuel Oil Sludge X50. Ship Recycling, Demolition and Hong Kong Convention: A residual category from MARPOL Annex VI compliance fuels requiring disposal at recycling.
Low sulfur marine gas oil (LSMGO) X47. Marine Fuel Quality and ISO 8217: Marine gas oil with sulfur content at or below 0.10 percent for SECA compliance.
Low Sulphur Fuel Oil (LSFO) D6. Decarbonization, emissions and alternative fuels: Marine fuel with 0.50 percent sulfur maximum.
Low Sulphur Fuel Residues X28. Ship Recycling and End-of-Life: Residual VLSFO requiring proper management during pre-recycling cleaning.
Low surface energy X45. Marine Paints, Coatings and Antifouling: Property of foul-release coatings that resists organism adhesion.
Low Temperature Carbon Steel (LT-CS) X20. LNG Operations and Custody Transfer: Fine-grain carbon steel for cargo deck piping and ballast tank steel exposed to LNG spills.
Low VOC X45. Marine Paints, Coatings and Antifouling: Coating formulated to reduce volatile organic compound content below regulatory limits.
Low Voltage Shore Connection X67. Marine Electrical Systems and Shore Power: Shore power supply below 1 kV, typically at 400 or 440 V, governed by IEC/IEEE 80005-3.
Low Water X73. Marine Hydrography, Charting and ENC: LW, the minimum tidal height in a tidal cycle, predicted in ATT and equivalent national tables.
Low water (LW) X16. Nautical Science, Navigation and COLREGs: Lowest level reached by a falling tide.
Low water alarm X19. Engine Room Watchkeeping and UMS Operations: Boiler drum low level alarm with separate low low cutout.
Low-Flashpoint Fuel A3. Marine environmental legislation: MARPOL and its annexes: Regulated through MARPOL/IGF interface.
Low-frequency wide-band sonar X77. Naval Mine Warfare and Mine Countermeasures: A class of sonars used for buried mine detection by exploiting penetration of the seabed.
Low-magnetic signature steel X77. Naval Mine Warfare and Mine Countermeasures: A specialty steel formulation used in some minehunter hulls and superstructures to limit magnetic anomaly.
Low-pressure cut-out X26. Reefer Containers and Cold Chain Logistics: Safety switch protecting compressor against loss of refrigerant charge.
Low-pressure dual fuel (LPDF) B2. Marine Engineering: Otto-cycle gas engine like Wartsila 31DF.
Low-Temperature Machine X41. Cruise Ship Public Health and VSP/USPH: Chemical sanitizing dishwasher relying on sodium hypochlorite at the manufacturer-specified concentration.
Low-Voltage Anode X100. Marine Cathodic Protection and Anodes: A sacrificial anode chemistry, such as zinc or aluminum, characterized by modest driving voltage relative to magnesium.
Low-Voltage Holiday Detector X88. Marine Surface Preparation and Coatings Application: Wet sponge instrument operating below 100 volts DC for detecting discontinuities in nonconductive coatings up to 500 micrometers thick per ASTM D5162 Type I.
Lowbed Trailer X104. Project Cargo Forwarders and Heavy Transport: Trailer with a low deck between gooseneck and rear bogie for tall loads.
Lower X3. Ship Handling, Seamanship and Deck Vocabulary: Slack down by easing a rope.
Lower Bend Section X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Stinger or sagbend region of an S-lay pipeline where curvature is highest above the touchdown point.
Lower Berth Capacity X164. Cruise Industry, Brands, Ship Classes, and Terminals: The double occupancy passenger count used as the standard reference for cruise ship size and crew to passenger calculations.
Lower discharge tube X175. Port Engineering, Dredging, Breakwaters, and Quays: Vertical pipe through the hull of a hopper dredger used for bottom or pump-ashore discharge of cargo.
Lower flammability limit (LFL) X149. Marine Fuels, Bunkering, and Alternative Fuels: The minimum vapor concentration that will burn in air; for methane it is around 5% v/v, a key safety parameter for LNG and methanol bunkering.
Lower High Water (LHW) D2. Hydrography, tides, waves, bathymetry and marine geology: Lower of two successive high waters of a tidal day.
Lower limb X16. Nautical Science, Navigation and COLREGs: Lower edge of the Sun or Moon's disc as observed in a sextant.
Lower Low Water (LLW) D2. Hydrography, tides, waves, bathymetry and marine geology: Lower of two successive low waters of a tidal day.
Lower Mississippi X33. Inland Navigation and Barge Operations: Mississippi River from Cairo to the Gulf of Mexico, unleveed natural channel.
Lower Mississippi River X103. US Inland Waterway Towing and Barge: The Mississippi River below the confluence with the Ohio at Cairo, Illinois.
Lower Performing RO X66. Port State Control and Regional MOUs: Recognized Organization with detention rates above the relevant threshold; contributes to higher SRP.
Lower Spreader X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Lowermost rigid spreader of the pilot ladder, required by SOLAS V/23 to be a minimum of 1.8 meters long and positioned per the regulations.
Lower Stack X14. Offshore Oil and Gas Marine Operations: Lower section of subsea BOP, contains the rams and wellhead connector.
Lower Wear X124. Dredging Industry and Reclamation Contractors: UK river maintenance dredging for Port of Sunderland.
LOWESS Smoothing D2. Hydrography, tides, waves, bathymetry and marine geology: Locally weighted regression used to smooth bathymetric or tidal data.
Lowest Astronomical Tide (LAT) X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Lowest tide level predicted to occur under average meteorological conditions, the standard IHO chart datum.
Lowestoft X42. Offshore Wind Installation and Cable Lay: UK port serving operations and maintenance bases for southern North Sea offshore wind farms.
Loxodrome B3. Nautical Science: Rhumb line.
Loyalist Naval Heritage F2. Maritime Culture, Heritage, Archaeology, Art and Museums: American Revolution-era Royal Navy auxiliaries.
LPD X11. Naval Vessels, Warship Systems and Naval Architecture: Landing Platform Dock, USN San Antonio class LPD-17.
LPG X1. Cargo Science, Commodities and Cargo Care: Propane, butane; carried fully refrigerated, semi-refrigerated, or pressurized.
LPG (Liquefied Petroleum Gas) X149. Marine Fuels, Bunkering, and Alternative Fuels: Propane or butane used as a marine fuel, primarily on LPG carriers with dual-fuel engines.
LPG broker desk X71. Shipbrokers and Brokerage Firms: Team focused on liquefied petroleum gas carrier chartering.
LPG carrier X56. LNG/LPG Carriers and IGC Code: Specialized ship designed to transport liquefied petroleum gas in bulk under the IGC Code.
LPG carrier (FR/SR/PR) B5. Ship Types and Individual Vessels: Fully refrigerated, semi-refrigerated, fully pressurized.
LPG Carrier Agency X86. Port Agency, Husbandry and Disbursement: Agency services tailored to LPG carriers and their terminal interfaces.
LPG Cylinder (Galley) X120. Marine Catering, Provisions and Ship Chandlers: IMPA 471102 cooking gas cylinder, refilled or exchanged at chandler depots.
LPG Freight Assessment X44. Shipping Indices, FFAs and Freight Markets: Baltic BLPG family covering very large gas carrier voyages such as Houston to Chiba and Ras Tanura to Chiba.
LPG hammer X42. Offshore Wind Installation and Cable Lay: Older pile driving technology largely superseded by hydraulic hammers in offshore wind.
LPG Specific Chapter X40. Tanker Vetting, SIRE and VIQ: VIQ Chapter 13 sub-section addressing LPG cargo systems on dedicated carriers.
LPG Tanker Specialist F3. Seafaring Life, Education, Professions and Institutions: STCW V/1-2 endorsement.
LPG terminal X15. Ports, Terminals and Stevedoring: liquefied petroleum gas import or export facility with refrigerated or pressurized storage.
LPH X11. Naval Vessels, Warship Systems and Naval Architecture: Landing Platform Helicopter, retired USN designation.
LPR Probe X100. Marine Cathodic Protection and Anodes: A linear polarization resistance probe installed in a process stream to give a continuous corrosion-rate signal.
LPS Method X54. Naval Architecture Software and IACS Rules: Load-Pressure-Stress workflow used in CSR-BC+OT direct strength analysis.
LPWAN (LoRa, NB-IoT) E3. Technology, digitalization and smart shipping: Low-power wide-area networks for port IoT.
LR X7. Flag State, Port State Control and Detention Vocabulary: See Lloyd's Register.
LR (Lloyd's Register) X5. Marine Surveying and Inspection: IACS member classification society.
LR (Lloyd's Register) Reports X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: Classification society reports that vetting personnel cross-reference against operator-supplied evidence.
LR 100A1 X8. IACS, Class Rules and Class Notations: Lloyd's Register principal class notation for ships built and maintained to LR Rules for unrestricted service.
LR ACS X19. Engine Room Watchkeeping and UMS Operations: Lloyd's Register notation for centralized control space.
LR Approval in Principle Ammonia X140. Ammonia as Marine Fuel and Hydrogen Shipping: Lloyd's Register AiPs issued to Hyundai, Samsung, Hanwha, Mitsui ENG NH3 designs.
LR ClassDirect X142. Classification Societies and Class Notations: LR online client portal.
LR Cyber AL1 to AL5 X25. Maritime Cybersecurity, OT and IT: Lloyd's Register Assurance Level scheme for cyber on ships, AL1 to AL5.
LR Cyber Security Capability Levels X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: Levels Mature, Performing, Secure, and Premium under the LR ShipRight framework.
LR ECO X8. IACS, Class Rules and Class Notations: LR environmental descriptive notation.
LR Escort 1 X137. Harbour Tugs, Towage Operators and Tug Builders: Lloyd's Register's lower escort notation rating tug for indirect work to defined limits.